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IS 14254-2 (2006): Programmable controllers, Part 2: Eqipment

1. Requirements of this subclause are verified in accordance with 6 2 3 4 3 Transport and storage conditions and requirements The following requirements apply to PLC units placed within manufacturer s original packaging Transport and storage of unpackaged portable equipment should not exceed the requirements of 4 2 17 IS 14254 Part 2 2006 IEC 61131 2 2003 When components are included in the equipment that have particular limitations for example CMOS components batteries etc the manufacturer shall specify the arrangements to be made for transport and storage 4 3 1 Temperature The allowable temperature range is 40 C to 70 C The temperature range 25 C to 70 C is acceptable but is not recommended for future designs Requirements of this subclause are verified in accordance with 6 1 1 The relative humidity range is 10 to 95 non condensing Requirements of this subclause are verified in accordance with 6 2 3 4 3 2 Relative humidity The relative humidity range is 10 to 95 non condensing Requirements of this subclause are verified in accordance with 6 1 3 4 3 3 Altitude The design atmospheric pressure for transportation shall be equivalent to 0 3 000 m altitude minimum 70 kPa No test required 4 3 4 Free falls PLC units in manufacturer s original packaging Withstand requirements for PLC units within manufacturer s original packaging are given in Table 5 below After th
2. Radio Damped frequency oscillatory interference wave surge Basic standard IEC 61000 4 4 IEC 61000 4 5 IEC 61000 4 6 IEC 61000 4 12 Test set up Table 39 Table 40 Tabie 41 Table 42 Performance criteria B Normativeitome T oo Interface Port Figure 2 Specific interface port designation Data communication Communication Aland Ar for I O racks Shielded cable 1 kV 5 0 5 kV CM and Be Bi and E for Unshielded cable 1 kV 5 No test 10 V 5 No test peripherals 7 z A _ AC 1 0 2 kV 5 2 kV CM 10 V 5 2 5 kV CM a Greve ew Analogue or 1kV CM 1 kV CM DC 1 0 2 kV 5 0 5 kV DM 10 V 5 0 5 kV DM unshielded All shielded lines 2 kV 5 2 kV CM 10 V 5 0 5 kV CM emer ff a AC power 4kV 4kV CM 10V 2 5 kV CM DC power 2 kV 4 2kV CM 10V 2 5 kV CM Protective earthing G No test Notet 1 O power J I O and 2 kV 2 kV CM 10 V 2 5 kV CM 1 0 and 2 kV 4 1 kV CM 10 V 1 kV CM 1 Not applicable to d c power ports intended for connection to a battery or a rechargeable battery that must be removed or disconnected from the equipment for recharging The test is applicable to d c power ports unless cables are specified lt 10 m a c Power ports to be tested regardless of specified length Fast transient burst Environmental phenomenon High energy Digital and analogue lOs C amp D Mains power F
3. Technical 5 External power supply data if required echaical data 6 Common points between channel if any Twisted pair 50 m max Month years 7 Type length of cable installation rules recommended to provide interference immunity 8 Calibration or verification to maintain rated accuracy 9 Terminal arrangements 10 Typical exampie s of external connections 11 Effect of incorrect input terminal connection 49 IS 14254 Part 2 2006 IEC 61131 2 2003 7 10 4 Information on analogue input miscellaneous characteristics Miscellaneous characteristics Units and examples 1 Monotonicity with no missing codes Yes no 2 Crosstalk between channels at d c a c 50 Hz and a c 60 Hz dB 3 Non linearity of full scale 4 Repeatability at fixed temperature after specified stabilization time Lifetime of electromagnetic relay multiplexers if applicable of full scaie Number of cycles of hours 7 11 Information on analogue outputs Besides the type and standard range the manufacturer shall provide the following information 7 11 1 Information on analogue output static characteristics Static characteristics Units and examples g 1 Output impedance in signal range manufacturer should specify if this is in the Q on or off state 2 Analogue output error maximum error at 25 C of full scale which scale of full scale K of full scale
4. 12 1 2 Operator accessibility tests Table 57 Operator accessibility tests 1 Reference tests IEC 60529 Selection of sample s Enclosed equipment Number of samples One equipment of each type Preconditioning Clean and new Details of mounting support According to manufacturer s specifications Drain ventilation holes Configuration used in operating conditions Moving parts test Equipment energized and operating Electrical shock test Equipment de energized Test description The jointed test finger IP2X and where applicable the test pin shall not make contact with any hazardous live part or any moving part except smooth rotating shafts 1 For open equipment no test is required and the user is responsible for the safety of the equipment 89 IS 14254 Part 2 2006 IEC 61131 2 2003 Unless obvious determination of whether a part is operator accessible shall be made as specified in 12 1 3 The jointed test finger Figure C 1 and test pin Figure C 2 shall be applied without force unless a force is specified Parts are considered to be accessible if they can be touched with a jointed test finger or test pin or if they could be touched in the absence of any covering which is not considered to provide suitable insulation For equipment accepting plug in modules parts are not considered to be accessible if they cannot be touched with the jointed test finger see 12 1 3 up to a depth of 180 mm from the
5. appear referring to this standard they should be read as Indian Standard b Comma has been used as a decimal marker while in Indian Standard the current practice is to use a point as the decimal marker In this adopted standard reference appears to certain International Standards for which Indian Standards also exist The corresponding Indian Standards which are to be substituted in their places are listed below along with their degree of equivalence for the editions indicated International Standard Corresponding Indian Standard Degree of Equivalence IEC 60068 2 1 1990 IS 9000 Part 2 1977 Basic environmental Technically Evironmental testing Part 2 testing for electronic and electrical items Equivalent Tests Tests A Cold Part 2 Cold test IEC 60068 2 2 1974 1S 9000 Part 3 1977 Basic environmental do Environmental testing Part 2 testing for electronic and electrical items Tests Tests B Dry heat Part 3 Dry heat test IEC 60068 2 6 1995 Environ IS 9000 Part 8 1981 Basic environmental do mental testing Part 2 Tests testing for electronic and electrical items Tests Fc Vibration sinusoidal Part 8 Vibration sinusoidal test IS 14254 Part 2 2006 IEC 61131 2 2003 International Standard IEC 60068 2 14 1984 Environmental testing Part 2 Tests Tests N Change of temperature IEC 60068 2 27 1987 Environmental testing Part 2 Tests Tests Ea and
6. auxiliary power output K 2 For non mains power ports with cables specified lt 30 m no test is needed 3 If this port is used for shield returns this port would be tested as a consequence of the shielded cable test Otherwise no specific test of this port is required 4 For ports with cables specified lt 10m no test is needed 5 For ports with cables specified lt 3m no test is needed The requirements of this subclause are verified in accordance with 9 5 9 6 9 7 9 8 9 9 9 10 and 9 11 105 IS 14254 Part 2 2006 IEC 61131 2 2003 Annex E informative Overvoltage example Figure E 1 shows which requirements apply to each part of a typical design of a power supply The following assumptions are made in this example overvoltage category li pollution degree 2 material group II no overvoltage protection all values are interpolated for 230 V r m s unless otherwise noted Switch mode Power supply Mains power input 120 230 V a c r m s 50 60 Hz DC output Recurring SELV Peak voltage 1 6 KV Working voltage Ue 450 V t 1 i I 1 Zone 1 Zone 2 Zone 3 1 i i i t I i I I i 1 6 kV Recurring peak voltage Working voltage Ue Working voltage Ue Recurring peak voltage Figure E 1 Creepage distances of circuits where recurring peak voltages are generated Zone 1 At the field wiring terminals the 1 6 mm interpolated from T
7. to provide energy for sensors and actuators processing unit s Open communication signals interface port internal communications also open to third party devices Auxiliary power supply optional Limit of the scope of this standard 4 interfaced devices and signals Communication interface port for local I O Communication interface port for remote I O station Open communication interface port also open to third party devices for example personal computer used for programming instead of a PADT 7 Internal communication interface port for peripherals Interface port for digital and analogue input signals Interface port for digital and analogue output signals Serial or parallel communication interfaces ports for data communication with third party devices Mains power interface port Devices with F ports have requirements on keeping downstream devices intelligent during power up power down and power interruptions Port for protective earthing Port for functional earthing I O power interface port used to power sensors and actuators Auxiliary power output interface port Figure 2 Typical interface port diagram of a PLC system 20 IS 14254 Part 2 2006 IEC 61131 2 2003 5 1 Functional power supply and memory back up requirements 5 1 1 AC and d c power supply Requirements of this subclause are verified in accordance with 6 3 1 6 3 2 and 6 3 3 5 1 1 1 Rated values and operating ranges Incoming po
8. stated by the manufacturer according to 5 1 1 1 25 IS 14254 Part 2 2006 IEC 61134 2 2003 Table 8 Rated values and operating ranges for current sourcing digital a c outputs Rated current state 1 N Normative items Current range for state 1 Min mA 10 5 1 2 continuous at max voltage Max A 0 28 1 1 1 Voltage drop Us for state 1 Non protected output Max V Protected and short circuit proof Max V Leakage current for state 0 Solid state outputs Max mA Max mA Electromechanical outputs Repetition rate for temporary Operating overload see Figure 5 cycle time s Max Max Solid state outputs Relay based outputs 1 2 Figures in square brackets apply to a module not equipped with RC network or equivalent surge suppressers All other values apply to modules with suppression RMS currents and voltages 3 Leakage current for solid state outputs greater than 3 mA imply the use of additiona external loads to drive Type 2 digital inputs Current A Relay Output 8 10s Solid state output 0 25A 13 1s 0 5 2A 3 25s wwe eww meee ee ew eee wee eee 3 Time s t1 2 cycles at Fn Fn rated line frequency t2 ON time t3 t2 OFF time OFF time ON time t3 Operation time Figure Temporary overload waveform for digital a c outputs 26 IS 14254 Part 2
9. 2006 IEC 61131 2 2003 2 2 2 Additional requirements 2 2 2 1 Output indicators Each output channel shall be provided with a lamp or equivalent means to indicate the output state 1 condition when the indicator is energized 2 2 2 2 Protected outputs For outputs stated by the manufacturer to be protected the output shall either withstand and or the associated protective device shall operate to protect the output for all steady state values of output current greater than 1 1 times the rated value after resetting or replacement of the protective device alone as applicable the PLC system shail return to normal operation optional restart capabilities may be selected among the 3 following types e automated restart protected output a protected output which automatically recovers after the overload is removed e controlled restart protected output a protected output which is reset through signals for example for remote control e manual restart protected output a protected output which implies a human action to recover the protection may be fuses electronic interlocks etc Requirements of this subclause are verified in accordance with 6 4 3 2 NOTE 1 Operation under overload condition for an extended period of time may affect the operating life of the module NOTE 2 The protected outputs will not necessarily protect the external wiring It is the user s responsibility to provide that protection when it
10. Class i equipment may have an internal functional bonding conductor but shall not be provided with a protective earthing terminal or a protective earthing conductor in the mains power input cord 11 9 2 Protective earthing terminal If the PLC system is provided with a protective earthing terminal Class equipment the following requirements also apply in addition to the previous general connection specifications The protective earthing terminal shall be readily accessible and so placed that the connection of the equipment to the protective earthing conductor is maintained when the cover or any removable part is removed Products which are intended for cord connected use such as peripherals shall be provided with a protective earthing terminal integral to the plug cap or socket if removable cord set The protective earthing terminal shall be of screw stud or pressure type and shall be made of a suitable corrosion resistant material The clamping means of protective earthing terminals shall be adequately locked against accidental loosening and it shall not be possible to loosen them without the aid of a tool Protective earthing terminals and earthing contacts shall not be connected direct to the neutral terminal within the PLC system This does not prevent the connection of appropriately rated devices such as capacitors or surge suppression devices between the protective earthing terminal and neutral The protect
11. lt time interval lt 10 s Number of trials Time interval between trials DC supply interruption Duration PS1 gt 1 ms PS2 10 ms 2 l 20 1 s lt time interval lt 10s According to PFVP 2 5 Number of trials Time interval between trials Measurement and verification during loading Normal operation shall be maintained 3 Verification after tests According to PFVP 2 5 1 Optionally the manufacturer may elect to interrupt supply at a random phase angle 2 The manufacturer may state longer interruptions 3 Fast responding inputs energized by the same power supply may be affected temporarily during the disturbance but shall resume normat operation after the disturbance 10 Electromagnetic compatibility EMC information to be provided by the manufacturer Information to be made available can be in other than printed form General rules of installation are noted in IEC 61131 4 Specific installation information shall be provided by the manufacturer The manufacturer shall state if its devices are intended to be used under normal service conditions or in a less severe environment for example office environment If the PLC is intended for other than Zone B which encompasses Zone A the manufacturer shall state the intended zone The test report shall describe all the tests the rationale for the selection of the typical representative configuration of the EUT and the test
12. part of the enclosure which is accessible when the equipment is used and which could cause a hazard if distorted For equipment with a non metallic enclosure the test is performed at an ambient temperature of 40 C Verification shall be in accordance with criteria 12 1 2 during and after the application of the force 12 1 8 Clearance and creepage verification Clearance and creepage requirements of 11 4 shall be verified by mechanical measurement where possible Manufacturer s specifications drawings etc may be used in lieu of product samples 12 1 9 Field wiring terminals constructional verification Terminals shall be designed to the requirements of 11 8 This shall be verified by fully inserting a stranded conductor with an 8 mm length of insulation removed with 1 of the strands free The strand shail not touch parts of different polarity or accessible conductive parts when bent in every possible direction without tearing back the insulation or making sharp bends around barriers 12 2 Safety related electrical tests CAUTION It may be necessary to install an external impedance a filter to protect the test equipment that is connected to the basic PLC system being tested 91 IS 14254 Part 2 2006 IEC 61131 2 2003 12 2 1 Dielectric withstand verification test Dielectric withstand testing is performed on an equipment sample preconditioned for 48 h at 40 C 2 C and 92 5 RH 2 5 RH The dielectric with
13. state 0 Uuinax Equals Uumin tO Jrmin and equals Urmin above Itmin Ue Ue max AND Us min are the rated voltage and its limits for the external power supply voltage Figure 4 U I operation regions of current sinking inputs 24 IS 14254 Part 2 2006 IEC 61131 2 2003 2 1 2 Standard operating ranges for digital inputs current sinking Current sinking digital inputs shall operate within the limits presented in Table 7 Table 7 Standard operating ranges for digital inputs current sinking Rated Rated Type Type 1 timits 7 Type 2 limits 7 Note Type 3 limits 7 voitage of EE ae fmm a etn te ee ae eet Sia UL eal IT UH uc ut ir UH r ae HA ie eee DC 24V zr 15 g ma 1 30 ws 1s 11 45 45 4 2 4 ba i a io m ELS esel r Se aaka ee 15 60 ee Fa 30 10 15 15 4 2 4 EEE BE ele Se ee seer ee aia 5 HOHH JERNES lejeje e AC 48 50 60 Fd iad HAH ana 30 10 15 1 3 Pen ARARSA 1 1 Ue 15 74 20 Hil B Ue 74 20 1 3 4 6 164 40 1 1 Ue 159 40 1 1 U 30 159 40 1 1 Ua 15 1 3 4 50 60 6 0 o 40 164 0 159 7 o o 40 159 5 All logic signals are in positive logic Open inputs shail be interpreted as state 0 signal See Annex B for equations and assumptions used in devetoping values in this table and for additional comments 2 The given voltage limits include all alternating voltages components 3 Static switches may affect the tota r m s
14. which scale Number of bits Binary BCD etc mV mA e temperature coefficient 3 Maximum error over full temperature range 4 Digital resolution 5 Data format returned of the application programme 6 Value of a LSB least significant bit 7 11 2 Information on analogue output dynamic characteristics Dynamic characteristics Units and examples 1 Settling time for full range change ms 2 Overshoot 3 of full scale Maximum temporary deviation during each specified electrical interference test of full scale 50 IS 14254 Part 2 2006 IEC 61131 2 2003 7 11 3 Information on analogue output general characteristics General characteristics Units and examples Type of protection Opto isolator etc Isolation potentials between channel and other circuits including V ground and between channels under normal operation External power supply data if required i Technical data For current outputs with external supply the maximum and minimum v voltage drop across the output terminals in the full output range Type length of cable installation rules recommended to provide f f interference immunity Twisted pair 50 m max Calibration or verification to maintain rated accuracy Month years Terminal arrangements Common points between channels if any Allowed type s of loads Floating grounded Maximum capacitive load for voltage outputs pF Maximum inductive l
15. 1150 2 500 1350 1900 4 000 2 200 3 100 6 000 3 250 4 600 1 Working voltage at all the operator accessible terminals of the device or circuit Working voltage of circuit 1 AC Vr m s or d c V Ue 30 30 lt Ue 50 3 50 lt Ua S 100 4 100 lt U s 150 150 lt U S 300 300 lt U S 600 600 lt U lt 1000 2 Three positive and 3 negative impulses at least 1 s between each 3 For d c products this range ends at 60 V For d c products this range begins at 60 V No test is needed for SELV PELV circuits units 13 3 Protective earthing test A simple continuity test shall be made between the protective earthing interface port and all operator accessible metal parts intended to be earthed The test shall be performed on all non SELV PELV rated voitage units The resistance shall not exceed 0 1 Q 97 IS 14254 Part 2 2006 IEC 61131 2 2003 14 Safety information to be provided by the manufacturer The manufacturer s data shall include the following information as a minimum Protective earthing requirements and recommendations concerning personnel safety circuits Requirements for the maintenance of protective devices such as protective earthing circuits overcurrent protective devices and batteries utilized for memory back up etc if the PLC system is provided as open equipment a suitable enclosure is required to provide th
16. 13 2 shall only be performed on equipment that has operator accessible hazardous live parts Unless it can be shown that subsequent manufacturing cannot invalidate the results of these tests these tests shall be performed on fully assembled modules or equipment 96 IS 14254 Part 2 2006 IEC 61131 2 2003 2 Verification that all isolating components used in the production of modules or equipment are 100 dielectric withstand tested as components or are supplied as meeting the component requirements of 11 12 When this method is chosen it must be used in conjunction with a verification by type tests that dielectric strength requirements of 11 1 4 are met b verification that creepage and clearance distances of 11 4 are met by the product during design c automated assembly and quality controlled manufacturing processes that assure consistency of the manufactured product 13 2 Dielectric withstand verification test The test voltage specified in Table 62 shall be applied between hazardous live terminals and circuits and all accessible conductive parts including terminals intended to be connected to circuits of other equipment which are not hazardous live but which are accessible One of the tests in Tabie 62 shall be carried out Table 62 Routine dielectric withstand test 5 Test voltages for 0 2000 m 2 V 1 2 50 us impulse peak 2 No test required No test required No test required 500 350 500 800 490 700 1500 820
17. 3 45 2 pollution degree 2 normally only non conductive pollution occurs Occasionally however a temporary conduc tivity caused by condensation must be expected 3 45 3 poliution degree 3 conductive pollution occurs or dry non conductive pollution occurs which becomes conductive due to condensation which is expected 13 IS 14254 Part 2 2006 IEC 61131 2 2003 3 46 port interface NOTE Most commonly used with respect to EMC 3 47 portable equipment enclosed equipment that is moved while in operation or which can easily be moved from one place to another while connected to the supply NOTE Examples are programming and debugging tools PADTs and test equipment TE 3 48 protective conductor conductor provided for purposes of safety for example protection against electric shock IEV 60195 02 09 3 49 protective extra low voltage PELV circuit electrical circuit in which the voltage cannot exceed a c 30 Vr m s 42 4 V peak or d c 60 V in normal and single fault condition except earth faults in other circuits A PELV circuit is similar to an SELV circuit that is connected to protective earth 3 50 protective impedance single component regarded as fault free a combination of components or a combination of basic insulation and a current or voitage limiting device the impedance construction and reliability of which are such that when connected between parts which are hazardous live and accessible c
18. 32 or Tabie D 2 ai NOTE The repeatability of this test is closely related to the number and relative position of wires within the capacitive coupling clamp 64 IS 14254 Part 2 2006 IEC 61131 2 2003 9 9 High energy surges Table 40 High energy surge immunity test EUT configuration According to manufacturer s specifications initial ee i According 5 PFVP 2 5 Details of A EET According to ETTE PE specifications Severity level 3 rated voltage See Table 31 aie 32 or Table D 2 Number eee Five each in positive w negative polarities er ae rate 1 min SE Application EA Direct coupling by ne capacitance method Shielded communication a Ar Be Bi and E and 2Q 10nF between nee and reference ground shielded I O C and D Unshielded communication Al Ar Be Bi and E and 420 0 5 uF CM 420 0 5 pF DM unshielded 1 O C and D 1 O Power J and auxiliary power output K AC DC power F 12 Q 9 uF CM 29 18uF DM According to PFVP 2 5 See Table 31 Table 32 or Table D 2 Measurement and verification during loading Performance criteria 65 IS 14254 Part 2 2006 IEC 61131 2 2003 9 10 Conducted radiofrequency interference Table 41 Conducted RF immunity test Reference test EUT configuration Initial measurements Details of mounting support Severity level at rated voltage Frequency range to be swept ee aed Test level anaes ere points Communication Ai Ar Be Bi and
19. Fast transient burst High energy surge Radiofrequency phenomenon interference Basic standard IEC 61000 4 4 IEC 61000 4 5 IEC 61000 4 6 Table 39 Table 40 Table 41 Performance criteria Normatvenems mT CCS Interface Port Figure Specific 2 designation interface port 1 kv 5 1kV CM 3 V 5 1 kV 5 No test 3 V 5 Data communication Communication Al and Ar for VO Shielded cable racks AC I O 2 kV 5 2 kV CM 3V 5 umaa aw Analogue or 0 5 kV CM DC I O 1 kV 5 0 5 kV DM 3 V 5 unshielded to shield os AC power 2 kV 2 kV CM 3V a a oi O DC power 2 kV 4 1kV CM 3v G H 3 and Be Bi and E for peripherals Unshielded cable Digital and analogue I Os C and D Mains power F I O power J VO and 1kV 2kV CM a c auxiliary power 1 kV DM VO and 1 kV 4 0 5 kV CM d c auxiliary power 0 5 kV DM 1 Not applicable to d c power ports intended for connection to a battery or a rechargeable battery that must be removed or disconnected from the equipment for recharging The test is applicable to d c power ports unless cables are specified lt 10 m a c Power ports to be tested regardiess of specified length and auxiliary power output 2 For non mains power ports with cables specified lt 30 m no test is needed 3 If this portis used for shield returns this port would be tested as a consequence of the shielded cable test Otherwise no specific
20. Figure 3 NOTE 2 A PLC system may be offered with interfaces that are not covered in this standard i e interfaces for TTL and CMOS circuits etc In such a case the manufacturer s data shall give all relevant information to the user 5 2 1 Digital inputs current sinking Requirements of this subclause are verified in accordance with 6 4 2 5 2 1 1 Terminology U I operation regions Figure 4 represents graphically the limits and operating ranges which are used herein to characterize current sinking digital input circuits The operating region consists of on region transition region and off region It is necessary to exceed both UT min and IT min to leave the off region and to exceed IH min before UH min to enter the on region all input U I curves shall remain within these boundary conditions The region below zero volts is a valid part of the off region for d c inputs only 23 IS 14254 Part 2 2006 IEC 61131 2 2003 A min NOTE Utimax and Unmin Imax and Inumin Utmax and Utmin Ftmax and Emin Umax and Uumin Tumax ANE Femin Transition region are the voltage limits for the on conditions state 1 are the current limits for the on conditions state 1 are the voltage limits for the transition state on or off are the current limits for the transition state on or off are the voltage limits for the off conditions state 0 are the current limits for the off conditions
21. air temperature The equipment shall be suitable for the operating temperature ranges given by the following Table 2 Table 2 Operating ambient air temperature of PLC systems Enclosed equipment x ventilated non ventiiated Temperature range a Permanent Non permanent Permanent installation installation installation 40 C 55 C in 5 C 5 C IS 14254 Part 2 2006 IEC 61131 2 2003 For enclosed non ventilated equipment that is cooled by natural air convection the equipment ambient air temperature is the room temperature 1 m away from the surface of the enclosure on a horizontal piane located at the vertical mid point of the enclosure For enclosed ventilated equipment the equipment ambient temperature is the temperature of the incoming air For open equipment the ambient air temperature is the temperature of the incoming air immediately below the equipment No forced external cooling is assumed Open peripherals which are intended to be permanently installed as part of the PLC system shall meet the operating temperature range of the PLC l Some types of equipment for example panel mounted HMI etc can use a combination of open and enclosed characteristics Requirements of this subclause are verified in accordance with 6 1 1 and 6 1 2 4 1 2 Relative humidity The equipment shall be suitable for a relative humidity level from 10 to 95 non condensing Requirements of this subclause are verif
22. be mounted in its normal use position in a test ambient temperature equal to its maximum rated operating air temperature see Table 2 However the equipment may be at lower test ambient if the measured temperatures are increased by the difference between the equipment s maximum rated operating temperature and the actual test ambient Steady state conditions shall be achieved The test ambient shall be monitored either at a point not more than 50 mm from the plane of the equipment s air flow entry point or at 1 point not more than 25 mm above and 1 point not more than 25 mm below the equipment with the ambient equal to the average of the 2 monitored temperatures The environment surrounding the equipment under test shall not be subject to air movement caused by sources not part of the equipment under test Wiring should be the smallest size suitable for the maximum current rating of the equipment and manufacturer s instructions The temperature test shall be followed by the dielectric withstand test 12 2 1 12 1 6 Protective coating test The test shall be conducted in accordance with the Type A coating requirements in IEC 60664 3 or shall be approved by a recognized testing authority for conformity with applicable safety requirements 12 1 7 Rigidity test The equipment shall be held firmly against a rigid support and subjected to a force of 30 N applied by the hemispherical end of a hard rod of 12 mm diameter The rod is applied to any
23. can be carried out on individual modules with the remaining modules removed All mechanical switches shall be in the on closed position Any accessible insulating part of an enclosure shall be covered with metal foil and the foil considered an accessible conductive part There shall be no unintentional flashover or breakdown of the insulation during the test an intentional flashover is one which might be the result of the normal action of a surge suppression device incorporated in the equipment Eventual operation of protecting devices provided on the units shall not be considered as a failure 92 IS 14254 Part 2 2006 IEC 61131 2 2003 Dielectric withstand testing need not be performed between a SELV PELV circuits and accessible parts or b SELV circuits and other SELV circuits Exceptions These tests need not be done on units parts of the basic PLC system which have been tested separately according to the relevant standards provided the values given in Table 58 or Table 59 have been met and their dielectric strength is not impaired by assembly Table 58 Dielectric withstand voltages for impulse a c power frequency and d c tests for basic supplementary insulation 5 Working voltage of circuit 1 Test voltages for 0 2000 m AC V r m s or d c V V 500 1 2 50 us Impulse For basic and supplementary Insulation peak 2 0 lt Ue s 50 3 50 lt U S 100 4 100 lt U s 150 150
24. conditions Under controlled conditions prescribed in IEC 60068 2 30 1 Power supply Power supply disconnected 1 Final measurements PFVP according to 2 5 performed after recovery 1 All external and internal condensation shall be removed by airflow prior to reconnecting the basic PLC system to a power supply 6 2 Mechanical tests 6 2 1 Vibration type test associated with normal service conditions Table 15 immunity vibration test Preconditioning According to manufacturer s specifications According to PFVP 2 5 According to manufacturer s specifications for portable and hand held equipment Initial measurements Details of mounting support Motion Sinusoidal Vibration amplitude acceleration 5 Hz lt f lt 9 Hz 9 Hz lt f lt 150 Hz 3 5 mm amplitude 1 0g Vibration type Sweeping at a rate of 1 octave min 10 Vibration duration 10 sweep cycles per axis on each of 3 mutually perpendicular axes Measurement and verification during loading According to PFVP 2 According to PFVP 2 5 Verification after tests 34 IS 14254 Part 2 2006 IEC 61131 2 2003 6 2 2 Shock type test associated with normal service conditions Table 16 Immunity shock test IEC 60068 2 27 test Ea According to manufacturer s specifications According to PFVP 2 5 Reference test Preconditioning Initial measurements Details
25. conducted in a well defined and reproducible manner All EMC tests are type tests It may be determined from consideration of the electrical characteristics and usage of a particular apparatus that some tests are inappropriate and therefore unnecessary In such cases it is required that the decision and justification not to test is recorded in the test report 60 IS 14254 Part 2 2006 IEC 61131 2 2003 9 2 Test environment The EUT is located in the specified test site and any auxiliary equipment shall be located outside the influence of the test environment For certain environments it is appropriate to expect that potential interference victims will be located at least a minimum distance from the radiator In the industrial environment the expected distance is 30 m All input output cables can be normally looped back for monitoring and testing and or can be terminated with a representative load In general for multi channel I O 1 circuit may be tested to represent all channels On and off states and or points representing the range of allowed loads must be tested 9 3 Measurement of radiated interference Table 34 Radiated emission measurement Reference test Test configuration in accordance with CISPR 11 and CISPR 16 1 2 See Tabie 27 Distance and method 1 Details of mounting support Installed according to manufacturer s specification Frequency range See Table 27 Clas
26. guidance Shock IEC 60068 2 30 1980 Environmental testing Part 2 Tests Tests Db and guidance Damp heat cyclic 12 12 hour cycle IEC 60068 2 32 1975 Environmental testing Part 2 Tests Tests Ed Free fall Procedure 1 IEC 60529 1989 Degrees of protection provided by enclosures IP Code IEC 60664 1 1992 Insulation coordination for equipment within low voltage systems Part 1 Principles requirements and tests IEC 60695 2 1 all sheets Fire hazard testing Part 2 Test methods Section 1 Glow wire test and methods IEC 60707 1999 Flammability of solid non metallic materials when exposed to flame sources List of test methods IEC 60947 5 1 1997 Low voltage switchgear and controlgear Part 5 1 Control circuit devices and switching elements Electromechanical control circuit devices Corresponding Indian Standard IS 9001 Part 3 1978 Guidance for environmental testing Part 3 Change of temperature IS 9001 Part 17 Sec 1 to 4 2000 Guidance for environmental testing Part 17 Impact test Section 1 Shock test first revision IS 9000 Part 5 Sec 1 and 2 1981 Basic environmental testing for electronic and electrical items Part 5 Damp heat cyclic test IS 9000 Part 7 Sec 1 to 5 1979 Basic environmental testing for electronic and electrical items Part 7 Impact test IS 12063 1987 Classification of degrees of protection provided by encl
27. materials transformers and opto isolators b enclosures or barriers c protective impedance see 11 1 7 3 Enclosures and barriers shall meet the rigidity requirements of 11 7 2 2 If enclosures or barriers provide protection by insulation it shall meet the requirements for basic insulation 72 IS 14254 Part 2 2006 IEC 61131 2 2003 Clearances creepage distances and insulation between accessible parts and hazardous live parts shall meet the requirements of 11 4 and the applicable dielectric strength requirements for basic insulation Compliance is checked a by the determination of 12 1 2 b by the requirements of 11 1 4 for dielectric strength of basic insulation c by the tests of 12 1 7 for rigidity of enclosures and barriers NOTE Materials which can easily be damaged are not considered to provide suitable insulation for example lacquer enamel oxides anodic films Non impregnated hygroscopic materials such as paper fibres and fibrous material are also not considered to provide suitable insulation 11 1 7 Protection in single fault condition Additional protection shall be provided to ensure that operator accessible conductive parts are_prevented from becoming hazardous live when a single fault occurs This additional protection shall be provided by one or more of the following means protective earthing and bonding see 11 1 7 1 supplemental insulation see 11 1 7 2 or protective impedance see 11 1 7
28. may result in increased risk of fire or electric shock and that have previously been investigated and found suitable for the application 12 3 2 Single fault condition Protective impedance test If a protective impedance is formed by combination of components each component shall be short circuited or open circuited whichever is less favourable lf a protective impedance is formed by the combination of basic insulation and a current or voltage limiting device both the basic insulation and the current or voltage limiting device shall be subjected to single faults applied 1 at a time Basic insulation shall be short circuited and the current or voltage limiting device shall be short circuited or open circuited whichever is less favourable 12 3 3 Single fault condition Mains transformers test The secondary windings of mains transformers shall be short circuited 1 winding at a time Current limiting impedances or overcurrent protection devices which are directly connected to any secondary winding shall be connected during this test 13 Safety routine tests 13 1 Dielectric withstand test Safety of insulation and or barriers is established according to the requirements of Clause 11 Manufactured quality of the insulation and or barriers must also be established according to one of the following methods 1 Routine dielectric withstand testing of the product in accordance with 13 2 When this method is chosen the tests of
29. of mounting support According to manufacturer s specifications for portable and hand held equipment Type of shock Half sine Shock severity 15 g peak 11 ms duration Application Three shocks in each direction per axis on 3 mutually perpendicular axes total of 18 shocks According to PFVP 2 5 According to PFVP 2 5 Measurement and verification during loading Verification after tests 6 2 3 Free fall type test associated with normal service conditions Table 17 Free fall immunity withstand tests portable and hand held equipment Reference tests Random and flat drops IEC 60068 2 32 procedure 1 Supported drops IEC 60068 2 31 3 2 1 Preconditioning According to manufacturer s specifications According to PFVP 2 5 Initial measurements Details of mounting support EUT equipped with manufacturer s standard cable s if any According to PFVP 2 5 According to PFVP 2 5 6 2 4 Free fall type test associated with transport and storage conditions Measurement and verification during loading Verification after the tests Table 18 Free fall withstand test units within manufacturer s original packaging Selection of samples Each type of manufacturer s original packaging with the heaviest unit using it Initial measurements According to PFVP 2 5 Details of mounting support EUT equipped with manufacturer s
30. of the programming languages supported by the PLC system combination of the PADT and the main processing unit s to what extent the languages defined in IEC 61131 3 are supported including the differences if any objects instructions semantic and syntactic rules etc 51 IS 14254 Part 2 2006 iEC 61131 2 2003 calculation methods to determine every memory utilization user s application programme and data firmware programme and data where applicable and average values of every relevant time scan time s system response time s transfer time s execution time s mechanisms in which I Os are processed i e use of I O image registers periodically refreshed by the system immediate get put type instructions interrupt and event driven programmes etc and their effect on the following subjects e system response time s e restart capabilities i e cold warm hot restart e detailed times for inputs outputs processing etc e effect of non permanently installed peripherals on every relevant time see item 8 of this subclause when they are plugged unplugged connected disconnected to their PLC system interface e PLC system status information concerning cold warm and hot restart if applicable Description and usage of programmable timers usable to determine the process dependent difference between warm and hot restart e self test and diagnostic functions implemented see 5 8 7 14 Information on re
31. operation or go to a predefined state and have a clearly specified behaviour until normal operation is resumed NOTE Outputs and fast responding inputs energized by the same supply ies will respond to these power supply variations i Table 33 Voltage drops and interruptions Maximum Time interval Low voltage interruption between drops Time DC supply Severity level PS1 ims Any voitage under lower operational limit Ue min _ 2 Severity level PS2 10 ms AC supply 0 5 period 1 Any arbitrary phase angle see 9 12 Ue min iS the Ue at minimum tolerance in Table 6 PS1 applies to PLC systems supplied by battery PS2 applies to PLC systems energized from rectified a c supplies and or long d c lines Voltage interruptions are from Ue min Requirements of this subclause are verified in accordance with 9 12 8 4 Requirements for EMC tests and verifications Test and verifications for EMC shall be performed by the manufacturer in accordance with Clause 9 8 5 Requirements for information on EMC Information on EMC shall be provided by the manufacturer in accordance with 10 9 Electromagnetic compatibility EMC type tests and verifications For EMC type tests also refer to pass fail criteria Table 29 9 1 Electromagnetic compatibility related tests The conducted and radiated emissions and immunity of the PLC system must be tested according to the manufacturer s installation guideline All EMC tests shall be
32. product as installed Since the PLC system is only 1 component of the overall automated system this standard does not deal with the EMC compatibility of the overall automated system 53 IS 14254 Part 2 2006 IEC 61131 2 2003 If an optional EMC enclosure for example cabinet or other protection device for example filter is specified by the manufacturer it shall be included as part of the equipment under test EUT The EMC enclosure port is the physical boundary of the PLC system through which electromagnetic fields may radiate or impinge See 3 46 8 2 Emission requirements 8 2 1 General requirements for emission For emissions the objective of the requirements given in Table 27 is to ensure protection of the radiofrequency spectrum 8 2 2 Emission limits in the low frequency range Since the PLC system is not connected to the public mains there is no requirement up to 150 kHz 8 2 3 Emission limits in the high frequency range Table 27 Emission limits pot Frequency range sph a rena Basic standard Measured at 10 m distance Measured at 30 m distance Enclosure port a i n radiated 30 230 MHz 40 dB uV m quasi peak 30 dB uV m quasi peak 230 1 000 MHz 47 dB uV m quasi peak 37 dB uV m quasi peak 0 15 0 5 MHz 79 dB uV quasi peak 66 dB uV average AC power port CISPR 11 CISPR 11 Class A Group 1 conducted Class A Group 1 0 5 30 MHz 73 dB uV quasi peak a 60 dB uV average NOTE Emission
33. protected output and for protected outputs operating characteristics beyond 1 1 including the current s level s at which the protecting device energizes the current behaviour beyond and the time s involved for short circuit proof outputs information for replacement or resetting the protective device as required 47 IS 14254 Part 2 2006 IEC 61131 2 2003 for non protected outputs specification for protective device to be provided by the user as required output delay time for state 0 to state 1 and state 1 to state 0 transitions commutation characteristics and turn on voltage with respect to zero voltage crossing existence of common points between channels terminal arrangements typical example s of external connections number and type of outputs for example NO NC contacts solid state individually isolated channels etc for electromechanical relays the rated current and voltage complying with 5 2 2 2 5 output ratings for the other loads such as incandescent lamps tota output current for multi channel modules see 3 38 characteristics of suppresser networks incorporated into the output circuit against voltage peaks due to inductive kickback type of external protective networks if required effects of incorrect output terminal connection isolation potentials between channel and other circuits including ground and between channels under norma
34. results The EUT software used during the test shall be documented 68 IS 14254 Part 2 2006 IEC 61131 2 2003 11 Safety requirements This section specifies safety requirements for PLC systems equipment i e MPU RIOSs permanentiy non permanently installed peripherals Components connected to the mains power supply of the installation such as power supplies I O modules communication interfaces and memory subsystems are also subject to the applicable provisions of this clause 11 1 Protection against electrical shock Protection against electric shock of the PLC system shall be maintained in normal and single fault condition Accessible parts of equipment shall not be or in the case of a single fault become hazardous live Although they are principally directed at enclosed equipment these requirements also apply to open equipment When applied to open equipment the equipment shall be considered to be installed according to the manufacturer s instructions Protection shall be by compliance with the dielectric strength requirements in 11 1 4 the operator accessibility requirements of 11 1 5 the normal condition requirements of 11 1 6 the single fault requirements in 11 1 7 and the clearance and creepage requirements in 11 4 SELV PELV circuits do not pose a risk of electric shock and do not require additional evaluation 11 1 1 Permissible limits for accessible parts To ensure that accessible parts are not haza
35. shall not exceed 3 times the distance from the enclosure surface to the control shaft or 100 mm whichever is smaller 12 1 4 Wire flexing test The flexing test applies to wiring subject to flexing during operation or maintenance and where conductors are solid or insulation is less than 0 8 mm thick Test procedure The flexing test consists of flexing the wire cable assembly between the 2 extreme points of travel for the cable Number of flexing cycles 500 if flexing occurs under normal use 25 if flexing occurs only during maintenance operations Pass fail criteria The wiring shall be considered acceptable if after this test the insulation passes the application of the dielectric withstand test 12 2 1 and the following insulation breakdown test method Insulation breakdown test method The wiring being tested is removed from the equipment and the portion of the cable having been flexed is wrapped with a conductive foil The applicable test voltage as given in Table 58 or Table 59 as appropriate is then applied between each conductor in turn and the common connection of all other conductors and this conducting foil l 90 IS 14254 Part 2 2006 IEC 61131 2 2003 12 1 5 Temperature test Temperatures shall be measured while the equipment is generating its maximum dissipation This dissipation may be caused by some combination of load current input voltage input frequency I O duty cycle etc The equipment shall
36. standard cable s if any Measurement and verification during loading None Verification after the test According to PFVP 2 5 35 IS 14254 Part 2 2006 IEC 61131 2 2003 6 2 5 Plugging unplugging of removable units Table 19 Insertion withdrawal of removable units Description of the test 50 insertions withdrawals are performed without power for permanently installed units then the equipment shall pass the PFVP 2 5 Description of the test 500 insertions withdrawals are performed while the basic for non permanently installed units PLC system is performing functional test programmes as required for PFVP 2 5 Insertions and withdrawals shall not affect the proper operation of the basic PLC system Communication on the physical link during the test is not required 6 3 Verification of special functional requirements for power ports and memory back up Special immunity limits for power ports Perform the proper functional verification procedure of 2 5 during tests under 6 3 1 and 6 3 2 Power ports are mains power input port port F Figure 2 6 3 1 Verification of functional mains power input port a c or d c 6 3 1 1 Voltage range voltage ripple and frequency range test Table 20 Voltage ripple and frequency range immunity test 1 EUT configuration According to manufacture s specifications Initial measurements According to PFVP 2 5 Description of tests 1 Gradual shut down Fast varia
37. test After completion of the overload test in 12 2 4 the switching device is to close and open a test circuit having the current voltage and power factor values given in Table 61 A total of 6 000 cycles consisting of 1 closing and 1 opening shall be completed The cycie timing shall be 1 s on and 9 s off except for the first 1 000 cycles of the pilot duty test The first 1 000 cycles of the pilot duty test shall be at a rate of 1 cycle per second except that the first 10 to 12 cycles are to be as fast as possible The endurance test need not be conducted on solid state output devices for general or resistive use Table 61 Endurance test circuit values C menoa Curent von O Pomorai C oc generaus raea OO rea Cd e a T 1 The test circuit is identical to the overload test circuit except that the voltage is the rated voltage Pass fail is determined by test completion without electrical dielectric mechanical breakdown of the equipment 12 3 Single fault condition test General Equipment and its circuit diagram shall be examined to determine fault conditions that are liable to result in hazards These fault conditions shall be applied while the equipment is operating under least favourable normal conditiond Some of the specific single fault condition tests are covered in 12 3 1 12 3 2 and 12 3 3 The equipment shall be operated until further change as a result from the applied fault is unlikely This is norm
38. test of this port is required 4 For ports with cables specified lt 10 m no test is needed 5 For ports with cables specified lt 3 m no test is needed Zone A levels apply where installation practices reduce industrial environmental levels below those of Zone B Referring to Figure 11 these may be installation of protection networks a c d c converters isolation transformers surge suppressers etc 58 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 32 Conducted immunity zone A Environmental Fast transient burst High energy surge Radiofrequency phenomenon interference IEC 61000 4 4 IEC 61000 4 5 IEC 61000 4 6 Table 39 Table 40 Table 41 Performance criteria Normative items Specific interface port Communication Interface Port Figure 2 designation Data communication Al and Ar for I O racks Shielded cable 0 5 kV 5 0 5 kV CM 3 V 5 and Be Bi and E for peripherals Unshielded cable No test AC O 1 kV 5 1 kV CM 3 V 5 unshielded 0 5 kV DM Analogue or d c I O 0 5 kV 5 3 V 5 unshielded All shielded lines 0 5 kV 5 1 kV CM 3 V 5 to shield D AC power 1 kV 1 kV CM 3V 0 5 kV DM Protective earthing Protective earth G Functional earthing Functional earth 0 5 kV 5 3v gt H 3 0 5 kV 5 Digital and analogue I Os C and D Mains power F 1
39. the following conditions 1 Output voltage is measured in no load condition 2 Output current and available power are measured after 60 s of operation with any over current protective devices short circuited with a resistive load including short circuit which produces the highest value of current and power respectively 74 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 45 Limits of output current and output power for inherently limited power sources Open circuit output voltage U Maximum output current Maximum output power AC V r m s DC V A VxA lt 20 lt 20 lt 8 0 lt 5 x U 20 lt U lt 30 lt 8 0 20 lt U lt 30 30 lt U lt 60 lt 150 U For non sinusoidal a c and for d c with ripple exceeding 10 the peak voltage shall not exceed 42 4 V peak Table 46 Limits of output current output power and ratings for over current protective devices for non inherently limited power sources Rated current value of over current protective device Maximum output current Maximum output power Open circuit output voltage U VxA A 20 lt U lt 30 20 lt U lt 60 lt 1 000 U lt 100 U Rated current values for over current protective devices are for fuses and circuit breakers which break the current within 120 s at a current value of 210 of the value in the last column of the table 11 4 Clearance and creepage distances requirements Clearance
40. 0 power J 1 0 and 0 5 kV 1 kV CM K d c auxiliary power 1 Not applicable to d c power ports intended for connection to a battery or a rechargeable battery that must be removed or disconnected from the equipment for recharging The test is applicable to d c power ports unless cables are specified lt 10 m AC power ports to be tested regardless of specified length 2 For non mains power ports with cables specified lt 30 m no test is needed 3 If this port is used for shield returns this port would be tested as a consequence of the shielded cable test Otherwise no specific test of this port is required 4 For ports with cables specified lt 10 m no test is needed 5 For ports with cables specified lt 3 m no test is needed Conditions of use may require installation in Zone C The manufacturer may elect to provide equipment for this installation by utilizing the levels given in Annex D Requirements of this subclause are verified in accordance with 9 5 9 6 9 7 9 8 9 9 and 9 10 59 IS 14254 Part 2 2006 IEC 61131 2 2003 8 3 4 Voltage drops and interruptions power ports These limits apply to the mains power interface port F in Figure 2 For short disturbances of the supply as defined in Table 33 the PLC system including RIOSs see 5 6 and non permanently installed peripherals shall maintain normal operation For longer interruptions of the supply ies the PLC system shall either maintain normal
41. 00 Part 4 Sec 4 1999 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 4 Electrical fast transient burst immunity test IS 14700 Part 4 Sec 8 1999 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 8 Power frequency magnetic field immunity test IS 14700 Part 4 Sec 12 1999 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 12 Oscillatory waves immunity test IS 14254 Part 1 2006 Programmable controllers Part 1 General information first revision IS 6873 Part 4 1999 Limits and methods of measurements of radio disturbance characteristics Part 4 Industrial scientific and medical ISM radio frequency equipment first revision IS 10052 Part 1 1999 Specification for radio disturbance and immunity measuring apparatus and methods Part 1 Radio disturbance and immunity measuring apparatus first revision Degree of Equivalence Identical do do do do do do do do IS 14254 Part 2 2006 IEC 61131 2 2003 International Standard Corresponding Indian Standard Degree of Equivalence CISPR 16 2 1996 IS 10052 Part 2 1999 Specification for identical Specification for radio disturbance radio disturbance and immunity measuring and immunity measuring apparatus and methods Part 2 Methods apparatus and methods of measurement of disturbances and Part 2 Methods
42. 1 1 Impact withstand test Table 56 Impact withstand test 1 Reference test IEC 60950 Selection of sample s Enclosed equipment with voltage greater than SELV PELV Exceptions Test performed neither on hand held equipment nor on displays nor lamps Description of the test See Figure 13 Number of trials One per surface Verification after the test Perform the operator accessibility test 12 1 2 and 12 1 3 Perform the dielectric withstand test 12 2 1 1 The unit may be non functioning before and after the test i 88 IS 14254 Part 2 2006 IEC 61131 2 2003 The impact is imparted to the sample by a solid smooth steel sphere approximately 50 mm in diameter and with a mass of 500 g 25 g see Figure 12 Top surface The sphere is to fall freely from rest through a vertical distance of 1 300 mm to the top surface Vertical surfaces The sphere is suspended by a cord and swings as a pendulum dropping through a vertical distance H of 1300 mm to the sphere impact position NOTE H 1300mm For the ball pendulum impact test the sphere is to contact the test sample when the cord is in the vertical position as shown Sphere start position m m Sphere impact position os Rigid backing support Test Sample Rigid supporting surface Figure 12 Impact withstand test procedure Test sample be ee impact position Rigid supporting surface
43. 1000 4 4 1995 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 4 Electrical fast transient burst immunity test IEC 61000 4 8 1993 Electro magnetic compatibility EMC Part 4 8 Testing and measurement techniques Power frequency magnetic field immunity test IEC 61000 4 12 1995 Electro magnetic compatibility EMC Part 4 12 Testing and measurement techniques Oscillatory waves immunity test JEC 61131 1 2003 Programmable controllers Part 1 General information CISPR 11 1997 Industrial scientific and medical ISM radio frequency equipment Electromagnetic disturbance characteristics Limits and methods of measurement CISPR 16 1 1993 Specification for radio disturbance and immunity measuring apparatus and methods Part 1 Radio disturbance and immunity measuring apparatus 1 Since revised in 1999 IS 14254 Part 2 2006 IEC 61131 2 2003 Corresponding Indian Standard IS 13252 2003 Information technology equipment Safety General requirements first revision IS 14700 Part 4 Sec 2 1999 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 2 Electrostatic discharge immunity test IS 14700 Part 4 Sec 3 2005 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 3 Radiated radio frequency electromagnetic field immunity test IS 147
44. 2 2006 IEC 61131 2 2003 2 3 Digital outputs for direct current current sourcing Requirements of this subclause are verified in accordance with 6 4 3 5 2 3 1 Rated values and operating ranges d c Digital outputs shall comply with the ratings given in the following Table 9 at the output voltage s stated by the manufacturer according to 5 1 1 1 Table 9 Rated values and operating ranges d c for current sourcing digital d c outputs Normative Current range for state 1 at maximum voltage continuous Voltage drop Uy Non protected output Protected and short circuit _proof E ele oie ee at Temporary overload Max A See Figure 6 or as specified by manufacturer fe 1 For 1A and 2A rated currents if reverse polarity protection is provided a 5 V drop is allowed This makes the output incompatible with a type 1 input of the same voltage rating 2 The resulting compatibility between d c outputs and d c inputs without additional external load is as follows Rated output current A 0 1 0 25 0 5 1 2 Type 1 yes yes yes no no Type 2 yes yes yes yes yes Type 3 yes yes yes yes yes 3 With adequate external load all d c outputs may become compatible with all Type 1 Type 2 and Type 3 d c inputs Current A t1 12 3 Time s t1 surge time 10ms 12 ON time t3 2 OFF time OFF time ON time 13 operation time 1s Figure 6 Temporary overload waveform for digital
45. 3 A single fault shall be considered to occur when a single component providing protection is unable to continue providing that protection Fault tests shall be performed on protective impedances parts intended for short term or ntermittent operation mains connected transformers outputs cooling provisions and insulation The testing shall consist of shorting opening blocking etc the part as appropriate while the equipment is operating under least favourable test conditions Tests shall be applied one at a time f After the application of the faults the equipment shall be verified not to have any operator accessible parts hazardous live and to satisfy the dielectric withstand verification of 12 2 1 without pre conditioning If a fault is terminated by the opening of a fuse and if the fuse does not open within approximately 1 s the equipment shail be operated for a period corresponding to the maximum specified fuse opening time Requirements of this subciause are verified in accordance with 12 3 141 1 7 1 Protective earthing and bonding Operator accessible conductive parts shall be bonded to the protective conductor terminal if they could become hazardous live in case of a single fault of the primary protective means specified in 11 1 6 Alternatively such accessible parts shall be separated from parts that are hazardous live by a conductive protective screen or barrier bonded to the protective conductor terminal Operator acc
46. 61000 4 8 Hz 60 Table 38 2 3 Power frequency Aim 30 magnetic fields Hz 50 Table 38 2 3 A m 30 1 The ESD test shall be applied to 1 operator accessible devices for example HMI PADT and TE 2 enclosure ports 3 service accessible parts for example switches keyboards protective functional earth module packaging communications ports with connectors in place and metai connectors which are not protected from casual access The ESD test shall not be applied to communications ports without connectors in place I O ports or power ports 2 This test is meant to test equipment sensitivity to magnetic fields normally occurring on the factory floor The test is only applicable to equipment containing devices susceptible to magnetic fields such as Hall effect devices CRT displays disk drives magnetic memories and similar equipment The PLC system does not normally contain such devices however other devices such as HMI may The test is not meant to duplicate high intensity magnetic fields such as those for example associated with welding and induction heating processes 3 There will be no deviation up to 3 A m Above 3 A m the manufacturer will specify the allowed deviation for CRT display interfaces 4 This level does not represent the field emitted by a transceiver in close proximity to the PLC system 104 IS 14254 Part 2 2006 IEC 61131 2 2003 Table D 2 Conducted immunity Zone C
47. ARIDABAD GHAZIABAD GUWAHATI HYDERABAD JAIPUR KANPUR LUCKNOW NAGPUR NALAGARH PATNA PUNE RAJKOT THIRUVANANTHAPURAM VISAKHAPATNAM Printed at Simco Printing Press Delhi
48. Ak k k k k Oe Oe Oe Oe k Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities in order to promote transparency and accountability in the working of every public authority and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public particularly disadvantaged communities and those engaged in the pursuit of education and knowledge the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public Saat aT afan SAA T afa Tad Bl ae AT h ACh Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru The Right to Information The Right to Live Step Out From the Old to the New iom4a4 2 2006 Programmable controllers Part 2 Egipment requirements and tests ETD 18 Industrial Process Measwimaement and Control Satyanarayan Gangaram Pitroda Bhartrhari Nitisatakam kkk kkk kkk kk kk kkk BLANK PAGE PROTECTED BY COPYRIGHT May 2006 IS 14254 Part 2 2006 IEC 61131 WRG ATP Toa are frase WT 2 gnn Uae send sie wlan eit gaer Indian Standard PROGRAMMABLE CONTROLLERS PART 2 EQUIPMENT REQUIREMENTS AND TESTS First Revision ICS 25 040 40 35 240 50 BIS 2006 BUREAU
49. Clauses 5 8 or 11 Compliance with a portion of this Part of IEC 61131 is provided to facilitate efforts with respect to particular conformity assessment requirements for example Clause 8 as the compliance requirement for the EU electromagnetic compatibility directive or Clause 11 as the compliance requirement for the EU tow voltage directive Compliance with constructional requirements and with requirements for information to be provided by the manufacturer shall be verified by suitable examination visual inspection and or measurement All requirements not tested according to the clauses on tests and verifications shall be verifiable under a procedure to be agreed to by the manufacturer and the user The manufacturer shall provide on request compliance verification information for all require ments referenced in the claims of compliance with all or a portion of this Part of IEC 61131 It is the manufacturer s responsibility to ensure that delivered PLC equipment and associated peripherals are equivalent to the sample s which have been type tested according to this Part of IEC 61131 and therefore that they comply with all requirements of this part Significant modifications shall be indicated through the use of suitable revision level indexes and markings see 5 11 and 11 15 and shall comply with this Part of IEC 61131 NOTE A new type test may be required to confirm compliance Where the manufacturer is allowed to select among sev
50. E VO C and D a c d c power F functional earthing H 1 O power J and auxiliary power output K IEC 61000 4 6 2 Note1 According to manufacturer s specifications According to PFVP 2 5 The EUT shall be such as to eliminate the radiated EMI received on O wiring by the specified magnetic coupling See Table 31 Table 32 or Table D 2 150 kHz 80 MHz 1 Note 2 80 AM by a 1 kHz sinusoidal 1 5 x 10 decade s See Table 31 3 Table 32 3 or Table D 2 All cable between EUT and clamp or CDN is as short as possible max 0 3 m CDN EM or current coupling clamp Measurement and verification during loading According to PFVP 2 5 Performance criteria See Table 31 Table 32 or Table D 2 NOTE 1 See also Annex H IEC 61000 4 3 1 There are no new radiators below 26 MHz Additionally history has shown no difficulty below 26 MHz So no test is necessary below 26 MHz The 0 15 26 MHz band is exempted from test 2 Conducted Immunity requirements for 26 80 MHz may be satisfied by utilizing the radiated electromagnetic field immunity test over the 26 80 MHz range See Table 37 3 For the 3 V open circuit test tevel if 2 is exercised a 10 V m field strength should be used NOTE 2 Notes on test level selection and Annex B of IEC 61000 4 6 66 IS 14254 Part 2 2006 IEC 61131 2 2003 Damped oscillatory wave for zone C only Table 42 Damped oscillatory
51. ELV circuit peia 9 vi AMP accessible metal part Method A Method B Method C Test between each Toar paeen aan F Test between each isolated circuit sequentially accessible conductive part SELV circuit and and the others together and each non SELV circuit SELV circuits separately Figure 13 Dielectric withstand test procedures 12 2 2 Protective earthing continuity test Test description A constant current of 30 A for at least 2 min shall be injected between the earthing terminal or contact and each of the accessible metal parts intended to be earthed The current shall be maintained or adjusted accordingly during the test to 30 A Any convenient low voltage not exceeding 12 V can be used The voltage drop shall be measured between the points of current flow care being taken that the contact resistance between the tip of the measuring probe and the metal part underneath does not influence the test results Pass fail criteria The calculated resistance shall not exceed 0 1 Q 12 2 3 Stored energy injury risk test Equipment shall be so designed that at an external point of disconnection of the mains supply there is no risk of electric shock from stored charge on capacitors connected to the mains circuit Compliance is checked by inspection of the equipment and relevant circuit diagrams taking into account the possibility of disconnection of the supply with the on off switch in either position if present Equipment shall be consi
52. OF INDIAN STANDARDS MANAK BHAVAN 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 2 2003 Price Group 19 IS 14254 Part 2 2006 IEC 61131 2 2003 Industrial Process Measurement and Control Sectional Committee ET 18 NATIONAL FOREWORD This Indian Standard Part 2 First Revision which is identical with IEC 61131 2 2003 Programmable controllers Part 2 Equipment requirements and tests issued by the international Electrotechnical Commission IEC was adopted by the Bureau of Indian Standards on the recommendation of the Industrial Process Measurement and Control Sectional Committee and approval of the Electrotechnical Division Council This part of the standard constitutes a series of standards on Programmable Controllers and their associated peripherals and should be read in conjunction with the other parts of the series Other parts of this series are as follows Part 1 General information Part 3 Programming languages Part 4 User guidelines Part 5 Communications Part6 Reserved Part 7 Fuzzy control programming Part 8 Guidelines for the application and implementation of programming languages for programmable controllers The text of the IEC Standard has been approved as suitable for publication as an Indian Standard without deviations Certain conventions are however not identical to those used in Indian Standards Attention is particularly drawn to the following a Wherever the words International Standard
53. The device shall pass the PFVP see 2 5 Protective devices such as fuses may be reset prior to verification 6 4 2 3 Verification of other requirements Verify that the general requirements for digital I Os under 5 2 and the requirement of 5 2 1 3 are met 41 IS 14254 Part 2 2006 IEC 61131 2 2003 6 4 3 Verification of digital outputs 6 4 3 1 Operating range test Verify that ail requirements are met Test procedures Current range To be agreed upon by the user and manufacturer Voltage drop To be agreed upon by the user and manufacturer Leakage current Devices circuits intended for output protection shall not be removed Temporary overload According to IEC 60947 5 1 AC 15 or DC 13 as applicable For short circuit proof outputs the current values shall be respectively 2 J to 20 J as given in 5 2 2 2 3 6 4 3 2 Test of protected not protected and short circuit proof outputs Table 26 Overload and short circuit tests for digital outputs Reference test EUT configuration According to manufacturer s specifications Details of mounting support According to manufacturer s specifications Loading It is sufficient to check one I O channel of each type under test Initial measurements According to PFVP 2 5 Prospective currents k x Je 1 2 1 3 1 1 5 e oe oe Order of trials First series at Tmin 1 2 Second series at Tmax 6 7 Time intervals between tests 10 min lt time i
54. Verify the requirements of 5 11 by visual inspection 7 General information to be provided by the manufacturer The manufacturer shal provide users with information required for the application design installation commission operation and maintenance of the PLC system In addition the manufacturer may provide user training Information to be made available can be in other than printed form 7 1 Information on type and content of documentation Three types of documentation are defined catalogues and datasheets user s manuals and technical documentation NOTE For the preparation of the instructions see IEC 62079 and IEC 61506 7 1 1 Information on catalogues and datasheets These documents shall contain the description and the specifications of the PLC system and its associated peripherals Additionally they shall contain any other relevant information to aid in understanding the application and use of these products including functional characteristics equipment configuration rules normal service conditions physical dimensions and weights and list compliance with standards and certifications 45 IS 14254 Part 2 2006 IEC 61131 2 2003 7 1 2 Information on user s manuals These documents shall include the necessary information for the proper installation wiring troubleshooting user programming and commissioning of the PLC system by the user They shall include as a minimum installation and commis
55. abie 49 dominates the 1 98 mm creepage distance from Table 52 Therefore a minimum of 1 6 mm clearance and creepage distance must be maintained Beyond field wiring terminals basic clearances must be 1 03 mm or greater according to Table 47 and creepage distances must be 1 98 mm or greater according to Table 52 Zone 2 On a printed circuit board a minimum basic clearance of 2 25 mm must be maintained according to Table 47 for the working voltage of 450 V and a creepage of 2 85 mm from Table 54 because of the 1 600 V recurring peak At the isolation boundary to the SELV circuit the 2 3 mm clearance from Table 48 dominates the 1 85 mm creepage calculated by multiplying the interpolated vaiue of 0 925 from Table 53 by 2 per O for double insulation Therefore a 2 3 mm minimum clearance and creepage distance must be maintained Zone 3 For SELV circuits recurring peak voltages are not present therefore only general safety requirements apply 106 IS 14254 Part 2 2006 IEC 61131 2 2003 Bibliography IEC 60038 1983 EC standard voltages IEV 60050 151 2001 International Electrotechnical Vocabulary IEV Part 151 Electrical and magnetic devices IEV 600050 161 1990 International Electrotechnical Vocabulary IEV Chapter 161 Electromagnetic compatibility IEV 600050 195 International Electrotechnical Vocabulary IEV Part 195 Earthing and protection against electric shock IEC 60112 1979 Method for determ
56. al symbols for use on equipment IEC 60529 1989 Degrees of protection provided by enclosures IP Code IEC 60664 1 1992 Insulation coordination for equipment within low voltage systems Part 1 Principles requirements and tests IEC 60664 3 1992 Insulation coordination for equipment within low voltage systems Part 3 Use of coatings to achieve insulation coordination of printed board assemblies IEC 60695 2 1 all sheets Fire hazard testing Part 2 Test methods Section 1 Glow wire test and methods IEC 60707 1999 Flammability of solid non metallic materials when exposed to flame sources List of test methods IEC 60947 5 1 1997 Low voltage switchgear and controlgear Part 5 1 Control circuit devices and switching elements Electromechanical control circuit devices IEC 60947 7 1 2002 Low voltage switchgear and controlgear Part 7 1 Ancillary equipment Terminal blocks for copper conductors IEC 60950 1 2001 Information technology equipment Safety Part 1 General requirements IEC 61000 4 2 1995 Electromagnetic compatibility EMC Part 4 2 Testing and measure ment techniques Electrostatic discharge immunity test IEC 61000 4 3 2002 Electromagnetic compatibility EMC Part 4 3 Testing and measure ment techniques Radiated radio frequency electromagnetic field immunity test IEC 61000 4 4 1995 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Sectio
57. ally limited to 1 h If at the end of 1 h there is an indication that there is a risk of spread of fire electric shock or injury to persons the test shall be continued until 1 of these hazards does occur or for a maximum period of 4 h For open equipment a wire mesh cage that is 1 5 times the size of the device may be provided to simulate the intended enclosure The outer enclosure or wire mesh cage if any and any grounded or exposed dead metal parts are to be connected through a 3 A fast acting non time delay fuse to the supply circuit pole least likely to arc to ground 95 IS 14254 Part 2 2006 IEC 61131 2 2003 The fault conditions shall be applied only 1 at a time in any convenient order Multiple simultaneous faults shall not be applied After application of each fault condition there shall be a no emission of flame or molten material nor ignition of cotton loosely placed around the item under test b no accessible hazardous live parts and c no opening of the 3 A fuse 12 3 1 Single fault condition Breakdown of components test Individual components such as capacitors diodes or other solid state components shall be short or open circuited Exception The test is not required if circuit analysis indicates that no other component or portion of the circuit will be seriously overloaded as a result of the assumed open circuiting or short circuiting of another component for components whose failure
58. and creepage distances shall be designed in accordance with this clause Creepage values are primarily directed at accommodating pollution concerns Clearance values are primarily directed at accommodating overvoltage concerns Clearance and creepage distances between circuits shall meet the requirements associated with the higher of the voltages of the circuits There are no requirements for clearance and creepage distances for the inner layers of multi layer printed circuit boards The actual clearance and creepage distances requirements shall be based 1 on the working voltages for the circuit under evaluation and 2 on the pollution degree specified by the manufacturer The clearance and creepage distances within a particular circuit which serve only to permit the functioning of the device and which do not serve to meet the requirements for galvanic isolation need only be of a size to prevent faults from occurring which would lead to a risk of fire Linear interpolation of creepage distance is permissible Interpolation of clearance is only permissible for a circuit or part that has no direct connection to the mains but is powered from a transformer converter or equivalent isolation device For voltage values less than or greater than those tabulated below the tables in IEC 60664 1 may be used Components mounted to printed circuit boards shall not degrade the galvanic isolation characteristics of the circuit under consideration T
59. ansmission in the best most likely and worst cases terminating devices if required physical characteristics of the communication interface including isolation characteristics maximum acceptable common mode voltage built in short circuit protections etc type of standard link interface i e RS 232 RS 422 RS 485 etc functional and safety earthing specifications 7 16 Information on self tests and diagnostics The manufacturer shall provide the following information through convenient documentation and marking description of tests and diagnostics which are implemented and when they are executed i e permanently periodically upon user s application programme request during start up procedure etc correct functioning state and driving conditions of the alarm output s see 5 8 8 Electromagnetic compatibility EMC requirements 8 1 General As potential radiating equipment the installed PLC system and other devices may emit conducted and radiated electromagnetic interference As potential receiving equipment the PLC system may be effected by externally generated conducted interference radiated electromagnetic fields and electrostatic discharges The requirements of 8 2 and 8 3 are intended to characterize the EMC performance of the PLC system equipment and are the responsibility of the manufacturer The user advised by the manufacturer is responsible for the electromagnetic compatibility of the
60. ch compatibility is such that a high percentage of proximity switches having Type 2 compatibility wiit also have Type 3 compatibility IS 14254 Part 2 2006 IEC 61131 2 2003 3 15 digital output device which converts a single bit binary number to a 2 state signal 3 16 earth conducting mass of the Earth whose electric potential at any point is conventionally taken as zero 3 17 EMC electromagnetic compatibility ability of an equipment or system to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbances to anything in that environment HEV 60161 01 07 3 18 enclosed equipment equipment which is enclosed on all sides with the possible exception of its mounting surface to prevent personnel from accidentally touching live or moving parts contained therein and to protect the equipment against ingress of medium size solid foreign bodies and meeting requirements of mechanical strength flammability and stability where applicable Protection degree must be 2 IP20 3 19 enclosure housing affording the type and degree of protection suitable for the intended application HEV 60195 02 35 3 20 equipment class class numbers designate the means by which electric shock protection is maintained in normal condition and single fault conditions of the installed equipment IEC 61140 3 21 equipment under test EUT representative configuration s as define
61. cludes all factors influencing the insulation such as climatic electromagnetic pollution etc IEC 60664 3 37 module part of the PLC system containing an identified function s MPU analogue input etc which may plug into a backplane or base 3 38 multi channel module module containing multiple input and or output signal interfaces These signal interfaces could be isolated or not isolated from each other 3 39 normal use operation including stand by according to the instructions for use or for the obvious intended purpose NOTE Normal service conditions are stated in Clause 4 12 IS 14254 Part 2 2006 IEC 61131 2 2003 3 40 normal condition condition in which all means for protection against hazards are intact that is a fault free condition 3 41 open equipment equipment that may have live electrical parts accessible for example a main processing unit Open equipment is to be incorporated into other assemblies manufactured to provide safety 3 42 operator person commanding and monitoring a machine or process through an HMI connected to the PLC The operator does not change the PLC hardware configuration software or the application programme A PLC is not intended for use by untrained personnel The operator is assumed to be aware of the general hazards in an industrial environment 3 43 overvoltage category of a circuit or within an electrical system classification based on limiting or contr
62. content of true harmonics of the input signals and therefore affect the compatibility of the input interface with proximity switches especially for Type 2 a c 24 Vr m s See 5 1 1 1 for requirements 4 Recommended for common usage and future designs 5 The minimum external power supply voltage for Type 2 d c 24 V inputs connected to 2 wire proximity switches should be higher than d c 20 V or UH min tower than d c 11 V to allow sufficient safety margin 6 As allowed by current technology and to encourage the design of single input modules compatible with all commonly used rated voitages limits are absolute and independent of rated voltage except UH max and based on equations given in Annex B and respectively a c 100 Vr m s and a c 200 V r m s 7 See definitions 3 12 3 13 and 3 14 Normative items 50 60 1 NOTE Compatibility with 2 wire proximity switches according to IEC 60947 5 2 is possible with Type 2 See also 3 ND Not defined 5 2 1 3 Additional requirements Each input channel shall be provided with a lamp or equivalent means to indicate the state 1 condition when the indicator is energized 5 2 2 Digital outputs for alternating currents current sourcing Requirements of this subclause are verified in accordance with 6 4 3 5 2 2 1 Rated values and operating ranges a c Digital a c outputs shall comply with the ratings given in Table 8 at the output voltage s
63. d be in accordance with the design equation given in Annex B Digital outputs shall comply with the requirements of the standard ratings given in 5 2 2 1 for a c or 5 2 3 1 for d c It shall be possible to interconnect inputs and outputs by means of a correct selection of the above digital I Os resulting in proper PLC system operation Additional external load shall be specified by the manufacturer if necessary it shall be possible to feed isolated multi channel a c input modules from different phases and the modules shall then comply with the maximum voltage difference likely to occur between phases or the user manual shall include a note indicating that all channels must be fed from the same phase If a multi channel a c circuit is intended for multi phase use the circuit shall comply with the clearance and creepage distance requirements and the dielectric test corresponding to the voltage between phases NOTE 1 Current sourcing inputs and current sinking outputs which may be required for certain applications are not covered in this Part of IEC 61131 Special care should be exercised in their use Where positive logic current sinking inputs and current sourcing outputs are used any short circuit to the reference potential and wire breakage are interpreted by the inputs and loads as the off state on the other hand for current sourcing inputs and current sinking outputs earth faults are interpreted as the on state See
64. d by the manufacturer used for type tests see Clause 2 3 22 external wiring wiring of the PLC system equipment which is installed by the user 3 23 field wiring external wiring 3 24 functional earthing conductor conductor that is in electrical contact with for example Earth for purposes of interference immunity improvement 3 25 hand held equipment equipment which is intended to be held in one hand while being operated with the other hand 10 IS 14254 Part 2 2006 IEC 61131 2 2003 3 26 hazardous live capable of rendering an electric shock or electric burn in normal condition or single fault condition NOTE See 11 1 1 1 for values applicable to normal condition and 11 1 1 2 for the values applicable to single fault condition 3 27 immunity to a disturbance ability of a device equipment or system to perform without degradation in the presence of an electromagnetic disturbance HEV 60161 01 20 NOTE Not used exclusively to refer to EMC in this standard It may also refer for example to vibration humidity etc 3 28 immunity type test immunity test type test verifying that the basic PLC system operation is not altered by the application of specified influencing quantities that are intended to approximate normal operation 3 29 insulation l NOTE 1 insulation can be a solid a liquid a gas for example air or any combination IEV 60151 03 30 NOTE 2 To insulate To prevent conduction bet
65. d c outputs 28 IS 14254 Part 2 2006 IEC 61131 2 2003 2 3 2 Additional requirements Other requirements are the same as for current sourcing outputs for a c as defined in 5 2 2 2 except for protected outputs the limit is 1 2 J instead of 1 1 Te electromechanical relay outputs AC 15 is replaced by DC 13 5 3 Analogue I Os Requirements of this subclause are verified in accordance with verification of analogue I Os test in 6 4 4 3 1 Analogue inputs Rated values of signal range and impedance for analogue inputs to PLC systems shall be as specified in the following Table 10 Table 10 Rated values and impedance limits for analogue inputs Signal range input impedance limits Normative Items 1 Not recommended for future designs Analogue inputs may be designed to be compatible with standard thermocouples or standard resistive temperature devices RTDs such as PT100 sensors Thermocouple analogue inputs shall provide a method for cold junction compensation 5 3 2 Analogue outputs Rated values of signals range and load impedance for analogue outputs of PLCs shall be as specified in Table 11 Table 11 Rated values and impedance limits for analogue outputs Signal range Load impedance limits Normative items 21 000 Q 1 21 000 Q 1 2500 Q 1 lt 600 Q 2 lt 600 Q 2 3 1 Voltage analogue outputs shal withstand any overload down to short circuit 2 Current analogue ou
66. dered to comply if any capacitor having a rated capacitance exceeding 0 1 uF and connected to the external mains circuit has a means of discharge resulting in a time constant not exceeding 1s for pluggable equipment 10s for permanently connected equipment The relevant time constant is the product of the effective capacitance in microfarads and the effective discharge resistance in megohms Where it is difficult to determine the effective capacitance and resistance values a measurement of voltage decay may be used In 1 time constant the voltage will have decayed to 37 of its original value 12 2 4 Overload test Switching devices shall close and open a test circuit having the current voltage and power factor values given in Table 60 Fifty cycles each consisting of 1 closed and 1 open action shall be completed using a timing of 1 s on 9 s off After completion of the 50 cycles the equipment shall be subjected to the endurance test in 12 2 5 if required by 11 11 94 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 60 Overload test circuit values 1 Unless otherwise specified the inrush current shall be 10 times the steady state current 2 Set up the EUT at its rated voltage and current and then increase the voltage by 10 without further adjustment of the load Pass fail is determined by test completion without electrical dielectric mechanical breakdown of the equipment 12 2 5 Endurance
67. ding to IEC 60947 5 1 or equipment utilizing them shall be subjected to the overload and endurance tests specified in 12 2 4 and 12 2 5 respectively The same sample shall be subjected first to the overload test and then the endurance test The dielectric withstand test specified in 12 2 1 shali immediately follow the endurance test or the overload test when conducted alone The endurance test shall not be conducted on solid state output devices for general or resistive use 11 12 Components Components shall comply with the applicable safety requirements of the relevant IEC product standard s or shall have been approved by a recognized testing authority for conformity with applicable safety requirements and need not be re tested 85 IS 14254 Part 2 2006 IEC 61131 2 2003 Where no relevant IEC component standard exists or where components are used in circuits not in accordance with their specified ratings the components shall be tested under the worst case conditions occurring in the equipment NOTE Components are parts of PLC system units for example capacitors resistors printed circuit boards relays transformers switches 11 13 Battery requirements Battery cases or compartments shall be designed to protect against accumulation of flammable gases or damage from spilling of corrosive liquid as applicable Rechargeable and non rechargeable batteries if used in the PLC shall be provided with suitable protection i
68. does not exceed a c 1 000 V r m s 50 60 Hz or d c 1 500 V if PLCs or their associated peripherals are applied in overvoltage category Ill installations then additional analysis will be required to determine the suitability of the equipment for those applications This standard does not deal with the functional safety or other aspects of the overall automated system PLCs their application programme and their associated peripherals are considered as components of a contro system Since PLCs are component devices safety considerations for the overall automated system including installation and application are beyond the scope of this standard However PLC safety as related to electric shock and fire hazards electrical interference immunity and error detecting of the PLC system operation such as the use of parity checking self testing diagnostics etc are addressed Refer to IEC 60364 or applicable national local regulations for electrical installation and guidelines The object of this standard is to establish the definitions and identify the principal characteristics relevant to the selection and application of PLCs and their associated peripherals to specify the minimum requirements for functional electrical mechanical environmental and construction characteristics service conditions safety EMC user programming and tests applicable to PLCs and the associated peripherals This Part also specifies a service stora
69. e process may be interrupted during ms etc as applicable 30 IS 14254 Part 2 2006 IEC 61131 2 2003 the peripheral shall ask the operator Do you really want to carry out this action or some similar words and execute the command only after a positive reply has been given by the operator It shall be possible to upload the new application programme to the manufacturer s supplied data media and verify on line that the record is functionally equivalent to it and means shail be provided to prevent unauthorized use of these functions hardware or software Requirements of this subclause are verified in accordance with 6 8 5 8 PLC system self tests and diagnostics requirements The manufacturer shall provide means for self tests and diagnostics of the PLC system operation Such means shall be built in services of the PLC system and or recommended ways to implement the intended application The following shall be provided a means for monitoring the user s application programme i e watchdog timer etc a hardware or software means to check the memory integrity a means to check the validity of the data exchanged between memory ies processing unit s and I O modules such as an application loop back test a means to check that the power supply unit s do es not exceed the current and voltage limits allowed by the hardware design ameans to monitor the status of MPU The permanently ins
70. e A 1 illustrates the hardware in the PLC system as defined for the purposes of IEC 61131 1 and IEC 61131 2 Non permanent peripherals Main Remote processing input output unit stations Permanent peripherals Not on line On line pluggable pluggable Non transpgrtable ae ew eee TETTETETT ee wee we ew ee eee ee wee wee eee ee ee ee Programmable controller lt _________ Peripherals Si Tue Permanent installation ee Non Permanent installation i TERE Programmable controller system PLC system es Figure A 1 Programmable controller system PLC system Portable and hand held peripherals have specific requirements and have to be distinguished from permanently installed peripherals see 4 2 3 99 IS 14254 Part 2 2006 IEC 61131 2 2003 Annex B informative Digital input standard operating range equations The following equations were used to generate Table 7 with some exceptions explained in the notes DC equations Uu max 1 25 U Uy min 0 8 Un Ua 1V Uy max 7 Uy min UL max Uni min for I lt TT min UT min 9 2 Un UL max UT min fOr Z gt Fy min UL min 3 V DC 24 V UL min 8 V DC 48 V li min ND Not defined Type 1 inputs Ty max IT max h max 15 mA lu min TT min 1 MA IT min Ux max Z Ua 3 V Table 9 Type 2 inputs TH max FT max 1 max 30 MA Ih min Zm t1MA 6 MA IT min 4 1 5 MA Ua d c 8 V Type 3 inputs IH
71. e necessary level of safety and environmental protection and guidelines for mounting Spacing and or internal barriers or shields if needed for safety Precautionary instructions if removal of any module while the equipment is in operation can affect safety related to electrical shock fire hazard and electrical damage A statement of the intended use of the PLC system relative to overvoltage category as defined in 3 43 Isolation potentials between channel and other circuits including ground and between channels under normal condition Information to be made available can be in other than printed form 14 1 Information on evaluation of enclosures for open equipment power dissipation The manufacturer s documents shail provide information to allow the evaluation of the power dissipation of every PLC configuration subassembly and module and provide information regarding minimum spacing required to assure adequate cooling under normal service conditions 14 2 Information on mechanical terminal connection The manufacturer shall provide the following information through convenient documentation and or marking Type cross sectional area and material of the conductors that may be connected to the PLC system Recommendations for use of shielded cables and how they are to be connected and earthed 98 IS 14254 Part 2 2006 IEC 61131 2 2003 Annex A informative illustration of PLC system hardware definitions Figur
72. e test they shall be fully functional and shall show no evidence of physical damage Table 5 Free fall on concrete floor in manufacturer s original packaging Shipping weight with Random free fall drop height packaging kg mm With shipping package With product package a ee el oww o w ee w S S ae ee a a em Requirements of this subclause are verified in accordance with 6 2 4 Number of falls 4 3 5 Other conditions The user should reach agreement with the manufacturer for any mechanical conditions that are not specified in this standard This may include items such as extra low temperature storage higher altitude transportation etc 4 4 Electrical service conditions and requirements 4 4 1 AC and d c mains power supply Refer to 5 1 1 18 IS 14254 Part 2 2006 IEC 61131 2 2003 4 4 2 Overvoltage category control of transient overvoltages The nature of the installation shall be such that overvoltage category II conditions shall not be exceeded Transient overvoltages at the point of connection to the mains power supply shall be controlled not to exceed overvoltage category Il i e not higher than the impulse voltage corresponding to the rated voltage for basic insulation The equipment or the transient suppression means shall be capable of absorbing the energy in the transient 4 4 3 Non periodic overvoltages In the industrial environment non periodic overvoltage peaks may ap
73. ed l when the values given in Table 52 Tabie 53 and Table 54 have been met as appropriate and their dielectric strength is not impaired by assembly 11 1 5 Operator accessibility Table 44 defines operator accessible ports of a PLC system Under special circumstances some ports of either open or enclosed equipment may or may not be considered operator accessible This must be agreed upon between the manufacturer and the user Tabie 44 Operator accessibility for open and enclosed equipment Sa ae coat fae Open equipment Enclosed equipment Al communication interface port for local IO extension rack Yes Ar communication interface port for remote 10 station Be open communication interface port also open to third party devices Yes for example personal computer used for programming instead of a PADT Bi internal communication interface port for peripherals C interface port for digital and analogue input signals D interface port for digital and analogue output signals E serial or parallel communication interfaces ports for data Yes communication with third party devices K auxiliary power output interface port Yes Yes Yes Yes Yes 11 1 6 Protection in normal condition Operator accessible parts shall be prevented from becoming hazardous live under normal condition by one or more of the following means a basic insulation NOTE This can be provided by suitable insulating
74. emporary degradation of Examples analogue values vary within performance must be self recoverable manufacturer specified limits communication delay times vary within manufacturer specified limits flickering on HMI display etc No change of operating mode Examples loss of data or uncorrected errors in communication unintentional state changes of digital I O which are seen by the system or test set up etc No irreversible loss of stored data according to PFVPs 2 5 Loss of functions accepted but no destruction of The PLC system shall continue to operate as hardware or software programme or data intended automatically after manual restart or power off power on 56 IS 14254 Part 2 2006 IEC 61131 2 2003 8 3 3 General radiated immunity limits Table 30 Radiated immunity and enclosure ports 1 Conducted immunity Zones A B Environmenta Basic Test severity Test set up phenomenon standard Electrostatic IEC 61000 4 4 Contact Table 36 discharge 2 8 Air GHz 1 4 2 0 IEC 61000 4 MHz 800 960 3 MHz 80 1 000 Table 37 Vim 10 AM 1kHz 80 Sinusoidal Table 38 2 3 8 Table38 2 3 ee 1 The ESD test shall be applied to a operator accessible devices for example HMI PADT and TE b enclosure ports c service accessible parts for example switches keyboards protective functional earth module housing communications ports with connectors in place and metal connectors wh
75. equipment is designed to prevent confusion of signal polarity the withstand test may not be carried out and replaced by proper visual inspection Test procedure A signal of reverse polarity for unipolar analogue inputs shall be applied for 10 s Verification The results shall be as stated by the manufacturer The device shall pass the PFVP see 2 5 Protection devices such as fuses may be reset prior to verification 6 4 4 6 Verification of other requirements Type tests are not required all requirements non tested shall be verifiable under a procedure to be agreed upon by the manufacturer and the user 6 5 Verification of communication interface requirements Type tests are not required all requirements non tested shall be veritable under a procedure to be agreed upon by the manufacturer and the user 6 6 Verification of MPU requirements Type tests are not required all requirements non tested shall be verifiable under a procedure to be agreed upon by the manufacturer and the user 6 7 Verification of remote I O stations 6 7 1 Response time test This test verifies the effect on transfer time s introduced to provide remote input information and RIOSs status to the application programme and to transmit its logical decisions to remote outputs Procedure An application test programme consisting of copying input status to outputs is run in 4 similar configurations local inputs to local outputs remote inputs t
76. er for any mechanical conditions that are not specified in this standard 7 5 information on shipping and storage The manufacturer shall provide shipping and storing instructions 7 6 Information on a c and d c power supply The manufacturer shall provide the following information data to allow selection of a suitable power distribution network to provide specified voltage at each power utilization point This information includes peak inrush at cold start and warm restart repetitive peak and steady state r m s input currents under full load conditions external terminal identification for power supply interfaces typical example s for power supply system s 46 IS 14254 Part 2 2006 IEC 61131 2 2003 special supply installation requirements if any for PLC systems energized through multiple power supplies or supply voltages and frequencies not included in 5 1 1 1 the effect of the following incorrect connections of power to the supply ies reverse polarity e improper voltage level and or frequency and e improper lead connection complete information on PLC system behaviour for typical power up down sequences data to allow evaluation of the maximum values of interruption time which do not affect the normal operation of any PLC system configuration PS class PS 1 or PS 2 of d c supplied devices memory back up time with respect to temperature and maintenance requirements recommended time inte
77. eral options he shall clearly specify in his catalogues and or datasheets those to which any portion of the PLC system equipment complies This applies to severity classes of voltage drops i e PS1 or PS2 and types of digital inputs i e Type 1 or Type 3 1 3 Normative references The following referenced documents are indispensable for the application of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document including any amendments applies IEC 60068 2 1 1990 Environmental testing Part 2 Tests Tests A Cold IEC 60068 2 2 1974 Environmental testing Part 2 Tests Tests B Dry heat IS 14254 Part 2 2006 IEC 61431 2 2003 IEC 60068 2 6 1995 Environmental testing Part 2 Tests Test Fc Vibration sinusoidal IEC 60068 2 14 1984 Environmental testing Part 2 Tests Test N Change of temperature IEC 60068 2 27 1987 Environmental testing Part 2 Tests Test Ea and guidance Shock IEC 60068 2 30 1980 Environmental testing Part 2 Tests Test Db and guinanee Damp heat cyclic 12 12 hour cycle IEC 60068 2 31 1969 Environmental testing Part 2 Tests Test Ec Drop and topple primarily for equipment type specimens IEC 60068 2 32 1975 Environmental testing Part 2 Tests Test Ed Free fall Procedure 1 IEC 60364 all parts Electrical installations of buildings IEC 60417 all parts Graphic
78. erformed by the manufacturer in accordance with Clause 6 5 13 Requirements for information on normal service and function Information on normai service and function shall be provided by the manufacturer in accordance with the requirements of Clause 7 6 Normal service and functional type tests and verifications 6 1 Climatic tests Tests are performed on unpackaged equipment Temperature sensitive components that are normally serviced and removed by the user may be removed if so requested by the manufacturer 32 IS 14254 Part 2 2006 IEC 61131 2 2003 6 1 1 Dry heat and coid withstand tests Table 12 Dry heat and cold withstand tests Dry heat Reference test IEC 60068 2 2 test Bb IEC 60068 2 1 test Ab Preconditioning According to manufacturer s specifications According to PFVP 2 5 Power supply unconnected Duration of exposure Ghtth 16htt1h Measuring and or loading during conditioning Recovery procedure IEC 60068 2 2 test Bb IEC 60068 2 1 test Ab Climatic conditions See 6 1 and 2 6 1 Specia caution No condensation 1 Power supply Power supply unconnected 1 All external and internal condensation shall be removed by airflow prior to connecting again the basic PLC system to a power supply 2 25 C 3 C is acceptable but not recommended for future designs 6 1 2 Variation of temperature Table 13 Change of temperature withstand and immunity tests A Withstand tes
79. es given in this table are for a c or d c voltages which contain no recurring peak voltage For micro environments where recurring peak voltages will be present see Table 54 V r m s of sinusoidal or non sinusoidal wave Protective coating shall adhere to the board insulation to result in a effectively solid insulation so as to exclude moisture and pollution and to withstand the specified overvoltages given in 11 1 4 Suitable for atl material groups and pollution degrees 1 2 and 3 No test is required if the manufacturer provides evidence that the protective coating has been tested according to either the test given in 12 1 6 or an equivalent acceptable independent laboratory test A test board coated but without components shall withstand the appropriate dielectric test voltage given in 11 1 4 For all material groups For material groups H Illa Creepage and clearance distances between circuits shall be those corresponding to the highest working voltage and the corresponding dielectric withstand voltage NOTE Tabie derived from IEC 60664 1 11 4 3 2 Creepage distance requirements for recurring peak voltages 11 4 3 2 1 Rationale The phenomenon of partial discharges will occur on a surface that is subjected to long periods of high humidity and recurring peak voltages impulses These recurring peaks will dry out small areas between the conductors that will then flash over giving rise to small sections of tracking Eve
80. essible conductive parts need not be bonded to the protective earth terminal if they are separated from all hazardous live parts by double insulation or reinforced insulation Compliance is checked by inspection 11 1 7 2 Supplemental insulation Clearances shall be in accordance with 11 4 1 and 11 4 2 Creepage distances shall be in accordance with 11 4 3 Fulfilling the requirements for double or reinforced insulation satisfies the requirements for protection under single fault conditions 73 IS 14254 Part 2 2006 IEC 61131 2 2003 11 1 7 3 Protective impedance The protective impedance shalt limit the voltage from becoming hazardous live under normal or single fault conditions on operator accessible parts or to values for SELV The use of a single component not liable to become defective in such a manner as to cause a risk of hazard is allowed see IEC 61010 1 14 6 Requirements of this subclause are verified in accordance with 12 3 2 11 2 Protection against the spread of fire There are no requirements for protection against the spread of fire within limited power circuits as described in 11 3 Components and spacings within limited power circuits need not be evaluated Protection against the spread of fire must be evaluated between limited power circuits and other circuits If limited power circuits are not employed all remaining subclauses of Clause 11 shall be applied with regard to spread of fire Where breakdow
81. f a test or analysis shall be rounded off in accordance with IS 2 1960 Rules for rounding off numerical values revised The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard V Since revised in 1999 IS 14254 Part 2 2006 IEC 61131 2 2003 Indian Standard PROGRAMMABLE CONTROLLERS PART 2 EQUIPMENT REQUIREMENTS AND TESTS 14 General First Revision 1 1 Scope and object This Part of IEC 61131 specifies requirements and related tests for programmabie controllers PLC and their associated peripherals for example programming and debugging tools PADTs human machine interfaces HMIs etc which have as their intended use the control and command of machines and industrial processes PLCs and their associated peripherals are intended to be used in an industrial environment and may be provided as open or enclosed equipment If a PLC or its associated peripherals are Intended for use in other environments then the specific requirements standards and installation practices for those other environments must be additionally applied to the PLC and its associated peripherals This standard also applies to any products performing the function of PLCs and or their associated peripherals Equipment covered in this standard is intended for use in overvoltage category II IEC 60664 1 in low voltage installations where the rated mains supply voltage
82. faces ports shown are meant to represent major example links not atl links Most EUTs will have multiple interface ports active during testing Third Sensors Control Interfaced power i ake an devices and evices actuators signals l C and D Interfaces ports Interfaces ports KE E 2 Ar Local extension I l 3 bus lt 3 m E W 4 EUTC EUT D i Local Auxiliary extension extension rack power supply rack EUTE EUT Limit of the scope of this standard PAST m Figure 1 EUT configurations Each subpart of the PLC system as shown in Figure 2 may constitute an EUT represented in Figure 1 as EUT A B C D E and or F To exercise the different ports of each EUT the manufacturer may define subsystems and the different EUTs are tested in turn Only 1 subsystem is under test at any time the others being considered as auxiliary equipment For instance to achieve a given test on the EUT A equipment of the other EUTs may be connected but are not in the test bed For example to check the electrical interference immunity of the PLC system the manufacturer may choose between the following as applicable to build a single global EUT including the PADT TE RIOSs and check the whole configuration or to define a suite of simpler EUTs for example a PLC system without any PADT TE RIOS and a single PADT and a single RIOS and a single PADT and a single TE or any other suite of
83. ge and transportation requirements for PLCs and their associated peripherals Clause 4 b functional requirements for PLCs and their associated peripherals Clause 5 c EMC requirements for PLCs and their associated peripherals Clause 8 d safety requirements for PLCs and their associated peripherals Clause 11 1 IS 14254 Part 2 2006 IEC 61131 2 2003 e information that the manufacturer is required to supply Clauses 7 10 and 14 f test methods and procedures that are to be used for the verification of compliance of PLCs and their associated peripherals with the requirements Clauses 6 9 and 12 The tests are type tests or production routine tests and not tests related to the ways PLC systems are applied 1 2 Compliance with this standard When compliance with this Part of IEC 61131 is indicated without qualification compliance with all clauses including all tests and verifications required in this part must be verified Moreover the manufacturer s obligations expressed in this part are not waived if no type test is required or if the test conditions are restricted for practical reasons When compliance with some portion of this Part of IEC 61131 is indicated it is only necessary to verify compliance with those clauses against which the compliance claim is made The manufacturer s obligations as indicated above are still applicable The smallest unit of this part for compliance purposes shall be a clause such as
84. group Material group 1 2 19 0 6 2 2 Pollution degree 1 Working voltage U AC V r m s or d c V 2 All material groups Basic and supplementary insulation 1 Creepage distances given in this table are for a c or d c voltages that contain no recurring peak voltages For micro environmentswhere recurring peak voltages will be present Table 54 applies 2 V r m s of sinusoidal wave 3 Creepage and clearance distances between circuits shall be that corresponding to the highest working voltage and the corresponding dielectric withstand voltage 4 Oniy for material group Ila Material group Illb is in general not recommended for application in pollution degree 3 above 630 V NOTE Tabie derived from IEC 60664 1 11 4 3 1 2 Minimum creepage distances for printed circuit boards Creepage distances associated with basic and supplementary insulation for protective coated and uncoated areas of printed circuit boards shall be not less than given in Table 53 nor less than the values of the appropriate clearances 79 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 53 Minimum creepage distances for printed circuit boards 1 6 9 basic and supplementary insulation Working voltage U Areas of PWBs with Uncoated areas of PWBs protective coating mm AC V r m s or d c V mm Pollution degree 1 Pollution degree 2 2 3 4 5 6 7 8 Creepage distanc
85. han 5 times per minute is not considered For clicks appearing more often than 30 times per minute the limits apply For clicks appearing between 5 and 30 times per minute a relaxation of the limits of 20 log 30 N where N is the number of clicks per minute is allowed 61 IS 14254 Part 2 2006 IEC 61131 2 2003 9 5 Electrostatic discharge Table 36 Electrostatic discharge immunity test Reference test IEC 61000 4 2 EUT configuration According to manufacturer s specifications Initial measurements According to PFVP 2 5 Details of mounting support According to manufacturer s specifications and IEC 61000 4 2 provisions Selection of application points The ESD test shall be applied to a operator accessible devices for example HMI PADT and TE b enclosure ports c service accessible parts for example switches keyboards protective functional earth module packaging communications ports with connectors in place and metal connectors which are not protected from casual access The ESD test shall not be applied to communications ports without connectors in place I O ports or power ports Test application Contact discharge EUT horizontal and vertical coupling planes Air discharge EUT Test levels See Table 30 or Table D 1 Time between two discharges 21s Number of discharges on each selected point Ten discharges after the equipment is discharged to earth Measurement and verification during l
86. he PLC system shall either maintain normal operation or go to a predefined state and have a clearly specified behaviour until normal operation is resumed Performance criteria during the tests the PFVP 2 5 shali ensure that the behaviour of the basic PLC system is as specified by the manufacturer and that there is no change not caused by the PFVP test programme and no erratic or a s of any kind 38 IS 14254 Part 2 2006 IEC 61131 2 2003 6 3 2 1 Gradual shut down start up test Table 22 Gradual shut down start up test Reference test EUT configuration The behaviour of the basic PLC system shall be according to PFVP 2 5 at minimum operational voltage and frequency gradual shut down of 6 3 1 1 and at maximum operational voltage and frequency fast variations of 6 3 1 1 Test description See Figure 7 Initial final conditions Power supply at rated values Ue Fn Lowest voltage V 0 zero Waiting time at lowest voltage s 10s 20 Number of trials 3 Time interval between trials 1s lt time interval lt 10s Measurement and verification during loading According to PFVP 2 5 Voltage shut down limit SDL The voitage at which the basic PLC system starts the manufacturer s specified shut down sequence or initiates a behaviour not in accordance with the PFVP during the decreasing voltage sequence 6 3 2 2 Supply voltage variation tests Table 23 Supply voltage variation tests The behaviour of
87. he event of a failure of the basic insulation NOTE Class equipment may have parts with double insulation or reinforced insulation or parts operating at safety extra low voltage Equipment for use with a flexible cord such as PADTs shall include a provision for a protective earth conductor that must be part of the cord set Accessible conductive parts of a PLC system which may become hazardous live in the event of a single fault shall be connected to the protective circuit of the PLC system This does not apply to accessible conductive parts such as screws rivets and nameplates which can become hazardous live under single fault conditions 70 IS 14254 Part 2 2006 IEC 61131 2 2003 When a part of the PLC system is removed from the enclosure for normal maintenance for example the protective circuits serving other parts of the PLC system shall not be interrupted Protective earthing requirements shall be as specified in 11 9 11 1 3 2 Class l equipment Class If equipment is equipment in which protection against electric shock does not rely on basic insulation only but in which additional safety precautions such as double insulation or reinforced insulation are provided there being no provision for protective earthing or reliance upon installation conditions Such equipment may be of one of the following types 1 insulation encased class I equipment equipment having a durable and substantially continuous enclos
88. his determination shall be made in accordance with the requirements in Table 50 Table 51 Table 52 Table 53 and Table 54 or in accordance with the test requirements in Table 58 or Table 59 75 IS 14254 Part 2 2006 IEC 61131 2 2003 For SELV PELV circuits and ungrounded accessible parts the requirements for double insulation shail apply to the clearance and creepage distances between these and hazardous live parts Clearances and creepage distances within SELV PELV circuits are based on functional needs and are not defined with respect to safety In all cases the values given shall be met or exceeded NOTE The extent to which the manufacturing process can contro the mechanical tolerance decides the limits to which practical clearance and creepage distances can approach the theoretical minimum values given in Tables 47 48 49 50 52 53 and 54 it is possible to approach minimum values when the equipment is manufactured in a factory under controlled conditions and finished to a point where additional assembly other than the connections to the field wiring terminals prior to placing the equipment in service is not necessary Replacement of components normally affected in service shops or in normal use for example fuses is considered to be part of controlled conditions increased clearances are required when the equipment is field mounted and field connected because the method of mounting and the method of wiring at the field
89. ich are not protected from casual access The ESD test shall not be applied to communications ports without connectors in place 1 O ports or power ports Performance criteria Normative items J Radio frequency Electro magnetic field Amplitude modulated Power frequency magnetic fields 2 This test is meant to test equipment sensitivity to magnetic fields normally occurring on the factory floor The test is only applicable to equipment containing devices susceptible to magnetic fields such as Hall effect devices CRT displays disk drives magnetic memories and similar equipment The basic PLC does not normally contain such devices however other devices such as HMI may The test is not meant to simulate high intensity magnetic fields such as those for example associated with welding and induction heating processes This requirement may be satisfied by the test being applied to the sensitive device at the device manufacturer 3 There will be no deviation up to 3 A m Above 3 A m the manufacturer will specify the allowed deviation for CRT display interfaces 4 This level does not represent the field emitted by a transceiver in close proximity to the PLC system Zone B levels are the most typical industrial environmental levels 57 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 31 Conducted immunity Zone B Environmental
90. ied in accordance with 6 1 3 4 1 3 Altitude The equipment shall be suitable for operation up to 2 000 m No test required 4 1 4 Pollution degree Where not otherwise specified by the manufacturer the equipment is designed for use in pollution degree 2 4 2 Mechanical service conditions and requirements Vibration shock and free fall conditions vary widely depending on the installation and environment and are very difficult to specify For the purpose of this standard the service conditions are indirectly defined by the following requirements which apply to fixed equipment as well as to unpackaged portable and hand held equipment see exceptions in 4 2 2 They do not apply to equipment containing assemblies other than PLC systems and or associated peripherals Experience shows that equipment meeting these requirements is suitable for industrial use on stationary installations Fixed equipment is that which is part of the permanent installation 4 2 1 Vibrations Immunity requirements are 16 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 3 Sinusoidal vibrations service conditions for PLC systems 3 5 mm amplitude 1 0 g constant acceleration The manufacturer shall specify the method of mounting portable and hand held peripherals on the test equipment i Frequency range Hz Continuous 5 lt f lt 9 1 75 mm amplitude 9 lt f lt 150 Vibration is applicable to each 3 mutually perpendic
91. ify the manufacturer the company bringing the product to market and the device The remaining information shall be provided in the data sheet See Clause 7 The following information shall be provided by the manufacturer manufacturer s name trade mark or other identification model catalogue number type designation or name software serial number and or revision level see 1 2 where applicable hardware serial number or series and or revision level see 1 2 and date code or equivalent Requirements of this subclause are verified in accordance with 6 10 11 1 Functional identifications The function of each I O module shall be unambiguously identifiable when it is placed in its service position and operating by means of a convenient manufacturer s mark All operator s switches indicator lamps and connectors shall be identified or have provisions for identification 5 11 2 Module location and module identifications Space shall be provided for identification of each module and I O channel on or near to the modules 11 3 Functional earth terminals markings Functional earth terminals i e used for non safety purposes such as interference immunity improvement shall be marked with the following symbol A NOTE For proper dimensioning see IEC 60417 5018 5 12 Requirements for normal service and functional type tests and verifications Test and verifications for normal service and function shall be p
92. illimeters Figure C 1 Jointed test finger Tolerances on dimensions without specific tolerance on angles 0 10 on linear dimensions up to 25 mm 0 0 05 mm on linear dimensions over 25 mm 0 2 mm Material of finger shall be heat treated steel and suitable insulator Both joints of the finger may be bent through an angle of 90 10 0 but in one and the same direction only 101 IS 14254 Part 2 2006 IEC 61131 2 2003 C 2 Test pins 20 4 15 1 Dimensions in millimeters Figure C 2 15 mm x 3 mm test pin B o S 4 25 0 2 Dimensions in millimeters Figure C 3 100 mm x 4 mm test pin 102 IS 14254 Part 2 2006 IEC 61131 2 2003 Dimensions in millimeters Figure C 4 100 mm x 3 mm test pin 103 IS 14254 Part 2 2006 IEC 61131 2 2003 Annex D informative Zone C EMC immunity levels When higher interference levels are encountered than zone B the following levels associated with Zone C may be appropriate Table D 1 Radiated immunity and enclosure ports 1 conducted immunity Zone C Environmental i Normative Performance T hanomanon Basie standara Unis Testseventy Tostsotup Normane Pearman Electrostatic IEC 61000 4 2 kV 4 Contact Table 36 1 discharge 8 Air GHz B 1 4 2 0 IEC 61000 4 3 MHz 800 960 ASAE Aia MHz 80 1000 Table 37 4 A amplitude modulated Vim 10 AM 1 kHz 80 Sinusoidal IEC
93. ining the comparative and the proof tracking indices of solid insulating materials under moist conditions IEC 60445 1999 Basic and safety principles for man machine interface marking and identification Identification of equipment terminals and of terminations of certain designated conductors including general rules for an alphanumeric system IEC 60947 5 2 1997 Low voltage switchgear and controlgear Part 5 2 Control circuit devices and switching elements Proximity switches IEC 61140 2001 Protection against electric shock Common aspects for installation and equipment IEC 61506 1997 Industrial process measurement and control Documentation of application Software IEC 62079 2001 Preparation of instructions Structuring content and presentation 107 Bureau of Indian Standards P BIS is a statutory institution established under the Bureau of Indian Standards Act 1986 to promote harmonious development of the activities of standardization marking and quality certification of goods and attending to connected matters in the country Copyright BIS has the copyright of all its publications No part of these publications may be reproduced in any form without the prior permission in writing of BIS This does not preclude the free use in the course of implementing the standard of necessary details such as symbols and sizes type or grade designations Enquiries relating to copyright be addressed to the Director Publicat
94. ion BIS Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments Standards are also reviewed periodically a standard along with amendments is reaffirmed when such review indicates that no changes are needed if the review indicates that changes are needed it is taken up for revision Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of BIS Catalogue and Standards Monthly Additions This Indian Standard has been developed from Doc No ET 18 5611 Amendments Issued Since Publication Amend No Date of Issue Text Affected BUREAU OF INDIAN STANDARDS Headquarters Manak Bhavan 9 Bahadur Shah Zafar Marg New Delhi 110002 Telephones 2323 0131 2323 3375 2323 9402 website www bis org in Regional Offices Telephones Central Manak Bhavan 9 Bahadur Shah Zafar Marg 2323 7617 NEW DELHI 110002 2323 3841 Eastern 1 14 C 1 T Scheme VII M V I P Road Kankurgachi 2337 8499 2337 8561 KOLKATA 700054 2337 8626 2337 9120 Northern SCO 335 336 Sector 34 A CHANDIGARH 160022 260 3843 l 260 9285 Southern C I T Campus IV Cross Road CHENNAI 600113 2254 1216 2254 1442 2254 2519 2254 2315 Western Manakalaya E9 MIDC Marol Andheri East 2832 9295 2832 7858 MUMBAI 400093 2832 7891 2832 7892 Branches AHMEDABAD BANGALORE BHOPAL BHUBANESHWAR COIMBATORE F
95. ions limit Ue max or and frequencies beyond the normal service conditions limits Fa max and Fh min the test shall be agreed between the user and the manufacturer 6 3 4 Verification of memory back up requirements 6 3 4 1 Back up duration withstand test Table 24 Back up duration withstand test EUT configuration According to PFVP 2 5 Duration of preparation According to manufacturer s specifications energy source may require time to be fully charged Either Test A or Test B defined below Tests to be performed Initial conditions Energy source fully charged external energy supply disconnected Temperature Open equipment 55 C General conditions Enclosed equipment 40 C 2 6 Verification after the test According to PFVP 2 5 The PLC system shall be fully operational No loss of retentive data is allowed 40 IS 14254 Part 2 2006 IEC 61131 2 2003 6 3 4 2 Verification of manufacturer s method of changing the energy source Table 25 Change of energy source test Reference test EUT configuration According to PFVP 2 5 Replacement of energy source According to manufacturer s specifications energy Source may require time to be fully charged Verification after the tests According to PFVP 2 5 The PLC system shall be fully operational No joss of retentive information is allowed 6 3 4 3 Verification of other requirements Check the required warning of
96. is needed 2 2 2 3 Short circuit proof outputs For outputs stated by the manufacturer to be short circuit proof for all output currents greater than J may and up to 2 times the rated value the output shail operate and withstand temporary overload s Such temporary overioad s shall be specified by the manufacturer for all output currents prospectively above 20 times the rated value the protective device shall operate After resetting or replacement of the protective device alone the PLC system shall return to normal operation for output currents in the range of 2 times to 20 times J or for temporary overload s beyond the limits specified by the manufacturer item 1 above the module may require repair or replacement Requirements of this subclause are verified in accordance with 6 4 3 2 2 2 2 4 Non protected outputs For outputs stated by the manufacturer to be non protected if the manufacturer recommends an external protection device then the outputs shall meet all the requirements stated for the short circuit proof outputs 2 2 2 5 Electromechanical relay outputs Electromechanical relay outputs shall be capable of performing at least 0 3 million operations with the load specified for AC 15 utilization calegory durability class 0 3 according to IEC 60947 5 1 The type test is not required if the relay components have been shown to comply with the requirements of IEC 60947 5 1 27 IS 14254 Part
97. ive earthing terminal and subsequent protective equipment internal to the PLC system shail comply with the test in 12 2 2 The protective earthing terminal shall have no other function 11 10 Wiring The following requirements shall apply to all wiring provided by the manufacturer for the internal and or external wiring of PLC system 11 10 1 Internal wiring The insulation when provided on all internal wiring of the equipment shall be rated for the voltage and the temperature conditions of use All splices and connections shall be mechanically secure and provide electrical continuity internal wiring shall be so routed and secured that neither it nor related electrical connections are likely to be subjected to stress or mechanical damage Internal wiring that is subject to flexing during operation or maintenance and whose conductors are solid or the insulation of which is less than 0 8 mm thick shall be tested for flexing integrity as specified in 12 1 4 84 IS 14254 Part 2 2006 IEC 61131 2 2003 Electrical connections shall be soldered welded crimped or otherwise securely connected Soldered connections subject to mechanical stress shall be mechanically secured indepen dently from the soldering Such connections shall not be used for other purposes such as fixing constructional parts Screw connections shall be secured against loosening This requirement does not apply to SELV PELV circuits earthing or bonding c
98. l operation monitoring points of visual indicators in the channel for example MPU side load side recommended procedures for changing output modules output behaviour during interruptions of MPU control voltage drops and interruptions and power up down sequences see also 5 6 way of operation i e latching non latching type effects of multiple overloads on isolated multi channel modules 7 9 Information on digital outputs for direct current current sourcing Information to be provided by the manufacturer for digital outputs for d c shall be the same as for digital outputs for a c as defined in 7 8 However the specification of commutation for zero voltage crossing does not apply and with regard to electromechanical relay outputs AC 15 is replaced by DC 13 in 5 2 2 2 5 7 10 Information on analogue inputs Besides the type and standard range the manufacturer shall provide the following information 48 IS 14254 Part 2 2006 IEC 61131 2 2003 7 10 1 Information on analogue input static characteristics Static characteristics Units and examples Input impedance in signal range manufacturer should specify if this is in the on or off state Analogue input error maximum error at 25 C of full scale which scale of full scale K of full scale which scale Number of bits Binary BCD etc mV mA V mA For example flag For example differential CMRR dB CMV V e
99. lation provided shall be such that the shafts and knobs do not become live in the event of an insulation fault 11 7 2 2 Mechanical strength The mechanical strength of the enclosure shall be such as to withstand rough handling in normal use The protection provided by the enclosures shail be verified after the application of the impact withstand test in 12 1 1 and the rigidity test in 12 1 7 11 8 Field wiring terminals constructional requirements Terminals shall be so designed that loose strands of wire shall not reduce the required clearance creepage requirements This shall be verified in accordance with 12 1 9 All parts of terminals that maintain contact and carry current shall be of metal of adequate mechanical strength This shall be verified in accordance with IEC 60947 7 1 Terminals shail be such that the conductors may be connected by means of screws springs or other equivalent means such as wire wrap quick disconnect terminal clamp type connection so as to ensure that the necessary contact pressure is maintained over the full range of service conditions Terminals shall not allow the conductors to be displaced or be displaced themselves in a manner detrimental to the operation of the equipment and the clearance and creepage distances shall not be reduced below the required values The mechanical design of the interfaces shall allow that no individual conductor is subjected to bending of a radius of curvature less than 6 time
100. limits at frequencies above 1 000 MHz are under consideration Requirements of this subclause are verified in accordance with 9 3 and 9 4 8 3 EMC immunity requirements 8 3 1 General if a product is to be used in multiple zones then it shall be designed and tested to the most severe combination of requirements for its intended zones PLC s are designed for Zone B which encompasses Zone A unless otherwise indicated by manufacturer s information 54 IS 14254 Part 2 2006 IEC 61131 2 2003 Outdoor Zone B i Zone A Tertiary Zone C protection Zone A I O l l i l Lightning 3 3 l i I l N Secondaryl protection F l i 3 Three phase p I l incoming power gt l F DA publis mains AA Outdoor Primary J ZoneBVO I N devices protection 3 3 appropriate to reduce Severi Protection Levels from those of outdoor to Zone B I 7 for outdoor ie s CID a rin network should be appropriate to a reduce Severity Levels from those of Zone B Factory grounding System to Zone A ALAALALALALALALL ELM AAMMEMAALAAAAALMLMALAALALLALALALMALMAEMAMAMMMA MMMM AMM Protection network should be devices Figure 11 EMC immunity zones The picture shown in Figure 11 is meant to describe the EMC and interference coupling mechanisms in a factory environment Zone separation is determined by power distribution and O wiring Dotted lines are not meant to indicate physical separation or segregation The letter
101. low battery voltage see requirements in 5 1 2 Remove the energy source and apply the proper controlled voltage in place of the energy source 6 4 Verification of input output requirements 6 4 1 General Test procedures are not defined in detail hereinafter Detailed procedures shall be agreed upon by the user and the manufacturer and shall be such that the conditions defined in 1 2 shall not be impaired Though test procedures are not defined in detail all tests which are referenced shall be performed Unless otherwise specified in this subclause all tests shall be carried out twice on the same VO channel s First test at minimum service temperature T nin i e 5 C or Tmin given in Table 2 S test at maximum service temperature Tmax 1 40 C 55 C or Tmax given in Table 2 It is not required to test more than 1 analogue input channel and 1 digital input channel of each type but all different types which are represented in the basic PLC system shall be tested All channels of multi channel output modules shall be tested 6 4 2 Verification of digital inputs 6 4 2 1 Operating range test Verify that all requirements are met Test procedures To be agreed upon by the user and manufacturer 6 4 2 2 Reversal of signal polarity test withstand test Test procedure A signal of reverse polarity for digital inputs shall be applied for 10 s Verification The results shall be as stated by the manufacturer
102. lt U S 300 300 lt U s 600 600 lt U S 1000 Working voltage at the field wiring terminals of the device or circuit 2 Three positive and 3 negative impulses at least 1 s between each 3 For d c products this range ends at 60 V 4 For d c products this range begins at 60 V No test is needed for SELV PELYV circuits units Table 59 Dielectric withstand voltages for impulse a c power frequency and d c tests for double reinforced insulation 5 Working voltage of circuit 1 Test voltages for 0 2000 m AC V r m s or d c V V 1 2 50 ps Impulse For double reinforced insulation peak 2 0 lt Ue lt 50 3 50 lt U S 100 4 100 lt U s 150 150 lt Ua s 300 300 lt U s 600 600 lt U s 1000 Working voltage at the field wiring terminals of the device or circuit 2 Three positive and 3 negative impulses at least 1 s between each 3 For d c products this range ends at 60 V 4 For d c products this range begins at 60 V No test is needed for SELV PELV circuits units 93 IS 14254 Part 2 2006 IEC 61131 2 2003 14 Isolated circuit Isolated circuit Isolated circuit Isolated circuit tsolated circuit t Isolated circuit U Isolated circuit isolated circuit Isolated circuit UT isolated isolated circuit circuit _ Isolated circuit i j A Dielectric test SELV circuit er SELV circuit volage EUT S
103. max T max t max 15 MA UH max Z lt Jy min Im 5 MA IT min 4 1 5 MA U d c 8 V AC equations Uy max 1 1 Ue Uy min 0 85 U Ug 1V 1 2 UT max UH min UL max UH min for I lt IT min Ur min 7 0 2 Un 1 UL max UT min for J gt TT min UL min 0 A mjn 0 Type 1 inputs IH max T max 1L max 15 MA lu min TT min 1 MA U lt 120 V r m s or TH min IT min 2 MA Ue gt 120 V r m s TT min UH max Z 5 U4 5 V Table 8 3 Type 2 inputs Ty max Ty max l max 30 mA Ty min Im imA 6 mA lT min Jp 3 MA 4 U a c 10 V r m s 4 Type 3 inputs Ty max Ty max JL max 15 mA ZH min Im 5 MA IT min 1 3 MA 4 Ug a c 10 V r m s 4 NOTE 1 For all a c 100 110 120 V r m s and all a c 200 220 230 240 V r m s inputs Un has been respectively selected as a c 100 Vr m s and a c 200 Vr m s in order to allow compatibility of a single module with various supply voltages NOTE 2 1 V drop a c or d c is assumed for the connecting leads NOTE 3 Maximum values of voltage drops Ua of digital outputs for d c and a c NOTE 4 These values of and J Ua and Im correspond to those adopted in IEC 60947 5 2 NOTE5 Z Empirical worst case relay contact open contact impedance 100 KQ 100 IS 14254 Part 2 2006 IEC 61131 2 2003 Annex C normative Test tools C 1 Jointed test finger Cylindrical Dimensions in m
104. mote input output stations RIOSs The manufacturer shall provide the following information specifications for the selection of adequate cables and other devices needed for the communication link specifications for proper installation of the whole system including proper selection of energy source s type of I O communication network point to point star multi drop ring etc principles procedures and transmission speeds used on the communication link and their Capability to transfer data from and to the RIOSs with respect to error coding detection and to the delays of transmission in the best most likely and worst cases effect on transfer time s introduced to provide remote input information and RIOSs status to the user s application programme and to transmit its logical decisions to remote outputs specified values and delays according to 5 6 configuration related data maximum number of RIOSs in 1 single PLC system configuration min max size of each which I O modules of the total 1 O system may not be used in RIOSs and or which of their functions are altered if any type architecture and characteristics of redundancy if provided modems repeaters if applicable Maximum distance with or without repeaters terminating devices if required physical characteristics of the communication interface including isolation characteristics maximum acceptable common mode voltage built in short circuit protections etc ty
105. n 4 Electrical fast transient burst immunity test IEC 61000 4 5 1995 Electromagnetic compatibility EMC Part 4 5 Testing and measure ment techniques Surge immunity test IEC 61000 4 6 1996 Electromagnetic compatibility EMC Part 4 6 Testing and measure ment techniques Immunity to conducted disturbances induced by radio frequency fields 3 IS 14254 Part 2 2006 IEC 61131 2 2003 IEC 61000 4 8 1993 Electromagnetic compatibility EMC Part 4 8 Testing and measure ment techniques Power frequency magnetic field immunity test IEC 61000 4 12 1995 Electromagnetic compatibility EMC Part 4 12 Testing and measure ment techniques Oscillatory waves immunity test IEC 61010 1 2001 Safety requirements for electrical equipment for measurement control and laboratory use Part 1 General requirements CISPR 11 1999 Industrial scientific and medical ISM radio frequency equipment Electromagnetic disturbance characteristics Limits and methods of measurement CISPR 16 1 1999 Specification for radio disturbance and immunity measuring apparatus and methods Part 1 Radio disturbance and immunity measuring apparatus CISPR 16 2 1999 Specification for radio disturbance and immunity measuring apparatus and methods Part 2 Methods of measurement of disturbances and immunity 2 Type tests The object of this clause is to define how to verify compliance of the PLC and the associated periphe
106. n of components is involved compliance is verified according to 12 3 1 11 3 Limited power circuits A limited power circuit is a circuit supplied by sources such as a battery or a transformer winding where the open circuit potential is not more than a c 30 Vr m s and 42 4 V peak or d c 60 V and the energy available to the circuit is limited according to one of the following means the maximum output current and power are inherently limited to not more than the values of Table 45 the maximum output current under all conditions and power are limited by impedance to be not more than the values of Table 45 an over current protective device limits the maximum output current and power to not more than the values of Table 46 a regulating network limits the maximum output current and power to not more than the values of Table 45 in normal use or as a result of one fault in the regulating network or a regulating network limits the maximum output current and power to not more than the values of Table 45 in normal use and an over current protective device limits the output current and power to not more than the values of Table 46 as the result of any one fault in the regulating network Where an over current protective device is used it shall be a fuse or a non adjustable non self resetting device Conformity is checked by measuring the output voltage the maximum output current and the maximum available output power under
107. ng to the manufacturer s specifications and installation instructions would pass satisfactorily the same tests and will properly function in normal operation which these tests are intended to reflect Unless otherwise specified in this standard the manufacturer may elect to use various EUTs to achieve the objectives of a given type test If an EUT representing a basic PLC or a remote I Os RIOS is of modular structure it shall fulfil the following minimum requirement 4 IS 14254 Part 2 2006 IEC 61131 2 2003 All types of modules shall be represented in 1 or several EUT configurations in which any mix of modules is permissible All types of modules shall be configured in the EUTs and tested at least once NOTE it may be appropriate to consider statistical criteria based on samples for a large number of I Os for example gt 100 If there are too many families to be included into a single EUT the manufacturer will define several EUTs For the type test of a family with very similar modules i e modules using the same schematic and basic manufacturing and differing mainly by for example the number of inputs and outputs the manufacturer may elect to include in the basic PLC system only 1 arbitrarily chosen member of the family If the type test is dependent on the differences between the modules then a single family member may not be used Appropriate catalogued options such as power supply units application memo
108. nternal or external to the battery cell so as to minimize the risk of battery explosion Parameters to be considered in the design should include temperature possibility prevention of reverse current flow limited discharge etc Means shall be provided to prevent charging and to limit the discharge current of non rechargeable batteries in both normal and single fault conditions Compliance shall be verified by performance of the test in 12 3 1 11 14 Maximum voltage and minimum voltage The equipment shall operate as intended without an increased risk of fire or electric shock when subjected to maximum voltage or minimum voltage conditions This requirement shall be verified by 12 1 5 11 15 Markings and identification Markings as indicated below shall be visible from the exterior of enciosed equipment or be visible after removing a cover or opening a door without the aid of a tool if the cover or door is intended to be removed or opened by an operator For open equipment markings are permitted to be on any surface that becomes visible after removal of the equipment from the rack or panel For all equipment as a minimum the information marked on the device shall identify the manufacturer the company bringing the product to market and the device The remaining information shail be provided in the data sheet supplied with the device The following information shall be provided by the manufacturer manufacturer s name t
109. ntervals lt 60 min Short circuit proof outputs No mo Yes 2 No Yes 4 Measurement and verification See requirements in 5 2 2 2 and 5 2 3 2 during the overload According to PFVP 2 5 after overioad and proper resetting According to PFVP 2 5 1 1 2 for a c outputs 1 3 for d c outputs 2 For currents in the range of 2 times to 20 times 7e the module may require repair or replacement 3 Protective device s to be provided or specified by the manufacturer shall be installed 4 Protective device s shall operate They shall be reset or replaced as applicable for the following test 42 IS 14254 Part 2 2006 IEC 61131 2 2003 6 4 3 3 Reversal of signal polarity test withstand test lf the equipment is designed to prevent reversal of signal polarity the withstand test may be not carried out and replaced by proper visual inspection Test procedure A signal of reverse polarity for digital d c outputs shall be applied for 10 s Verification The results shall be as stated by the manufacturer The device shall pass the PFVP see 2 5 Protection devices such as fuses may be reset prior to verification 6 4 3 4 Verification of other requirements Verify that general requirements for digital Os under 5 2 2 or 5 2 3 and the remaining requirements of 5 2 2 2 or 5 2 3 2 are met output indicators and electromechanical relay outputs 6 4 4 Verification of analogue I Os 6 4 4 1 Operating range te
110. ntually total tracking will occur between conductors and breakdown occurs The values given in Table 54 will prevent any partial discharge from occurring and are valid for pollution degrees 1 and 2 11 4 3 2 2 Creepage distance requirements for recurring peak voltages in addition to the clearance and creepage distance requirements of the preceding clauses when recurring peak voltages are present the creepage distance requirements given in Table 54 below shall also be met 80 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 54 Minimum creepage distances related to recurring peak voltages on printed wiring boards without protective coating 1 pollution degrees 1 and 2 Maximum recurring Creepage distance peak voltage 2 3 mm peak voltage 2 3 mm 330 1150 1 400 0 2 450 0 25 600 0 4 640 0 5 800 0 75 1140 1 5 1 This table does not apply to peak values of 50 Hz 60 Hz wave of the mains supply However it does apply to short duration peaks superimposed on the 50 Hz 60 Hz wave 2 Recurring peak voltage values are based on statistical evaluation of partial discharge data 3 Existence of recurring peak voltages may be determined by circuit analysis 11 4 4 Creepage distances for double reinforced insulation Creepage distances shall be double the value for basic insulation 11 4 5 Creepage for field wiring terminals Creepage distances for field wiring terminals shall be in acc
111. o acceptable D 11 15 4 Equipment protected by double reinforced insulation The graphica symbol to be used shall be NOTE Symbol according to IEC 60417 5019 Equipment protected throughout by double reinforced insulation Class Il shall be marked with the following symbol unless it is provided with a protective terminal Equipment which is only partially protected by double reinforced insulation shall not bear this symbol NOTE Symbol according to IEC 60417 5172 11 15 5 Equipment supplied by SELV PELV Equipment intended to only be energized by a SELV or PELV source of supply shail be so marked on equipment and or provided in product literature 11 15 6 Rating information Equipment shall be marked with the following as applicable rated voltage s or range of voltage in volts V rated frequency in hertz Hz kindof supply system a c d c or a c d c or the symbols 5032 5031 or 5033 from IEC 60417 number of phase conductors if more than one rated current in amperes A and or rated input and or output power in watts W or volt amperes VA 87 IS 14254 Part 2 2006 IEC 61131 2 2003 For open type equipment the information shall be marked on the equipment or in the manual 11 16 Requirements for safety type tests and verifications Test and verifications for safety shall be performed by the manufacturer in accordance with Clause 12 11 17 Requirements for safety routine te
112. o conductive parts EV 60151 15 50 3 10 current sinking property of receiving current 3 11 current sourcing property of supplying current 3 12 digital input type 1 device for sensing signals from mechanical contact switching devices such as relay contacts push buttons switches etc Converts an essentially two state signal to a single bit binary number NOTE Type 1 digital inputs may not be suitable for use with solid state devices such as sensors proximity switches etc 3 13 digital input type 2 device for sensing signals from solid state switching devices such as 2 wire proximity switches Converts an essentially 2 state signal to a single bit binary number NOTE 1 Two wire proximity switches described here are designed to IEC 60947 5 2 NOTE 2 This class could also be used for Type 1 or Type 3 applications 3 14 digital input type 3 device for sensing signals from solid state switching devices such as 2 wire proximity switches Converts an essentially 2 state signal to a single bit binary number NOTE 1 This class could also be used for Type 1 applications NOTE 2 Type 3 digital inputs offer lower power characteristics then Type 2 digita inputs Generally this allows much higher input channel densities per module or product Type 3 differs from Type 2 in that it is compatible with those IEC 60947 5 2 devices that offer low current in the off state See Table 7 for details of operating ranges Proximity swit
113. o local outputs local inputs to remote outputs and remote inputs to remote outputs Pass fail criteria The total system response times and the subsequent variations of transfer time s shall conform to the manufacturer s published specifications 6 7 2 Loss of communication test When communication is removed outputs shall assume a manufacturer s specified state within a manufacturer s specified interval without erratic or unintended behaviour and the communication error shall be signalled to the user 44 IS 14254 Part 2 2006 IEC 61131 2 2003 Procedure The test is performed by disconnecting a the link b the RIOS external power supply and observing the behaviour of the basic PLC system i e of the MPU as well as of the RIOS and of their outputs Pass fail criteria According to requirements 6 7 3 Verification of other requirements Type tests are not required all requirements non tested shall be verifiable under a procedure to be agreed upon by the manufacturer and the user 6 8 Verification of peripheral PADTs TEs HMis requirements All requirements non tested shall be verifiable under a procedure to be agreed upon by the manufacturer and the user 6 9 Verification of PLC system self tests and diagnostics All requirements non tested shail be verifiable under a procedure to be agreed upon by the manufacturer and the user 6 10 Verification of markings and manufacturer s documentation
114. oad for current outputs Typical example s of external connections Output response at power up and power down Effect of incorrect output terminal connection 7 11 4 Information on analogue output miscellaneous characteristics Monotonicity Yes no Crosstalk between channels at d c a c 50 Hz and a c 60 Hz dB Non linearity of full scale Repeatability at fixed temperature after specified stabilization time of full scale Output ripple of full scale 7 12 Information on communication interfaces If the manufacturer provides communication interfaces to other than his own equipment he shall provide the necessary information for correct operation This may be achieved by referencing a specific standard or specification together with details of any options such as baud rate type of cable to be used etc 7 13 Information on main processing unit s and memory ies of the PLC system Information to be provided by the manufacturer for main processing unit s and memory ies shall be organization capacity of programme memory organization capacity of data memory and number of bits per word memory type s i e CMOS EPROM etc available memory back up functionality and service requirements if any data constraints and procedures to determine a desired configuration racks cables bus expanders power supply unit maximum number of I Os per type maximum number of I O modules etc description
115. oading According to PFVP 2 5 Performance criteria See Table 30 or Table D 1 1 1 If the system deviates only once during the test a second trial of 10 discharges shall performed if more non allowed deviations are observed failure of the ESD test shali be declared 62 IS 14254 Part 2 2006 IEC 61131 2 2003 9 6 Radiofrequency electromagnetic field Amplitude modulated Table 37 Radiated electromagnetic field immunity test Reference test IEC 61000 4 3 EUT configuration According to manufacture s specifications Initial measurements According to PFVP 2 5 Details of mounting support The EUT is placed in the calibrated test field Frequency range to be swept See Tabie 30 or Table D 1 2 Note Modulation See Table 30 or Table D 1 Sweep speed 1 5 x 10 decade s Test field strength See Tabie 30 or Table D 1 1 According to PFVP 2 5 Measurement and verification during loading See Tabie 30 or Table D 1 1 Except for the ITU broadcast frequency bands 87 108 MHz 174 230 MHz and 470 790 MHz where the ievel shall be 3 V m i Performance criteria 2 Conducted immunity requirements 9 10 for 26 80 MHz may be satisfied by utilizing this test over the 26 80 MHz range See Table 41 NOTE See also Annex H IEC 61000 4 3 9 7 Power frequency magnetic fields Table 38 Power frequency magnetic field immunity te
116. of measurement immunity of disturbances and immunity In addition to the above references appear for the following Internationa Standards for which no identical or technically equivalent Indian Standards exist The technical committee responsible for the preparation of this Indian Standard has reviewed the provisions of the following International Standards and has decided that they are acceptable for use in conjunction with this standard International Standard Title IEC 60417 all parts Graphical symbols for use on equipment IEC 60664 3 1992 Insulation coordination for equipment within low voltage systems Part 3 Use of coatings to achieve insulation coordination of printed board assemblies IEC 60947 7 1 2002 Low voltage switchgear and controlgear Part 7 1 Ancillary equipment Terminal blocks for copper conductors IEC 61000 4 5 1995 Electromagnetic compatibility EMC Part 4 5 Testing and measurement techniques Surge immunity test IEC 61000 4 6 1996 Electromagnetic compatibility EMC Part 4 6 Testing and measurement techniques Immunity to conducted disturbances induced by radio frequency fields IEC 61010 1 2001 Safety requirements for electrical equipment for measurement control and laboratory use Part 1 General requirements For the purpose of deciding whether a particular requirement of this standard is complied with the final value observed or calculated expressing the result o
117. olling the values of prospective transient overvoltages occurring in a circuit or within an electrical system having different nominal voltages and depending upon the means employed to influence the overvoltages IEC 60664 1 NOTE 1 In an electrical system the transition from 1 overvoltage category to another of lower category is obtained through appropriate means complying with interface requirements These interface requirements may be an overvoltage protective device or a series shunt impedance arrangement capable of dissipating absorbing or diverting the energy in the associated surge current to lower the transient overvoltage value to that of the desired lower overvoitage category NOTE 2 Equipment covered in this standard is intended for use in overvoltage category Il 3 44 permanent installation portion of the PLC system which is required to perform the intended application function NOTE See Annex A 3 45 pollution degree in the micro environment for the purpose of evaluating clearances and creepage distances 3 degrees of pollution in the micro environment are established NOTE 1 The conductivity of a polluted insulation is due to the deposition of foreign matter and moisture NOTE 2 The minimum clearances given for pollution degrees 2 and 3 are based on experience rather than on fundamental data 3 45 1 pollution degree 1 no pollution or only dry non conductive pollution occurs The pollution has no influence
118. on terminals exposed conductive parts etc exceeding the specified temperature limits NOTE For a multi channel module the total output current is generally less than the sum of the output currents of the channels 3 56 type test conformity test made on one or more items representative of the production TEV 60151 16 16 3 57 unit integral assembly which may consist of modules plugged in or otherwise connected within the assembly connected to other units within the system by means of cables for permanently installed units and cables or other means for portable units 3 58 withstand type test withstand test type test verifying that the application of more severe influencing quantities to the basic PLC system does not impair its ability to assume its intended mission 3 59 working voltage highest value of the a c r m s or d c voltage across ah particular insulation which can occur when the equipment is supplied at rated voltage Ue Transients are disregarded Both open circuit conditions and normal use are taken into account 4 Normal service conditions and requirements It is the user s responsibility to ensure that the equipment service conditions are not exceeded The PLC and PLC system is intended to be used in an industrial environment The user must ensure the installation conditions match the environmental conditions given in this standard 4 1 Climatic conditions and requirements 4 1 1 Operating ambient
119. onductive parts it provides protection to the extent required by this standard in normal and single fault condition 3 51 recurring peak voltage peak value of a generated voltage whose characteristic is recurring at some specified period 3 52 routine test conformity test made on each individual item during or after manufacture EV 60151 16 17 3 53 safety extra low voltage circuit SELV circuit electrical circuit in which the voltage cannot exceed a c 30 V r m s 42 4 V peak or d c 60 V in normal and single fault condition including earth faults in other circuits An SELV circuit is not connected to protective earth 3 54 service personnel person changing or repairing the PLC hardware configuration or the application programme The service person may also install software updates provided by the manufacturer They are assumed to be trained in the programming and operation of the PLC equipment and its use They are persons having the appropriate technical training and experiences necessary to be aware of hazards in particular electrical hazards to which they are exposed in performing a task and of measures to minimize danger to themselves or to other persons or to the equipment 14 IS 14254 Part 2 2006 IEC 61131 2 2003 3 55 total output current of an output module current that a multi channel module operating at the most adverse combination of normal operation can supply without any part of it insulati
120. onductors 11 10 2 Interconnection wiring This clause applies to the PLC system and the manufacturer supplied cables with connectors only and does not apply to the whole industrial control system in which the PLC system is employed Cables and cords provided for the interconnection of equipment shall comply with the requirements of 11 10 1 Cable assemblies and flexible cords provided for interconnection between sections of equipment or between units of a PLC system shall be a type that is acceptable for the voltage_ and temperature involved and shall be provided with suitable strain relief Misalignment of plug and socket connectors insertion of a multi pin connector in a connector other than the one intended to receive it and plugging and unplugging of connectors that are accessible to the operator shall not result in mechanical damage or risk of fire to the PLC system or electric shock or injury to persons from the PLC system 11 10 3 Mains power input cord The mains power input cord provided by the manufacturer shall comply with the mains power input cord requirements in 6 10 of IEC 61010 1 The circuitry connected to a cord set removable or fixed shall be so designed that there is no risk of electric shock as indicated in 11 1 after 1 s when touching the pins of the plug and or receptacle Test shall be conducted in accordance with 12 2 3 11 11 Switching devices Switching devices shall be used within their ratings accor
121. opening in the equipment Nor are they considered accessible if they are at a depth of more than 180 mm from the opening if the operator is intended to perform any actions in normal use with or without a tool which will increase the accessibility of parts such actions shall be taken before performing the examinations of 12 1 3 Examples include removing covers opening doors adjusting controls replacing consumabie material and removing parts 12 1 3 General examination of openings The jointed test finger Figure C 1 shall be applied in every possible position Where a part could become accessible by applying a force the jointed test finger made rigid shall be applied with a force of 10 N The force shall be exerted by the tip of the jointed test finger made rigid so as to avoid wedge and lever action The test shall be applied to all outer surfaces including the bottom The test pin Figure C 3 shall be inserted in any openings above parts which are hazardous live The test pin shall be suspended freely and allowed to penetrate up to 100 mm The additional safety measures of 11 1 7 for protection in single fault condition are not required solely because a part is accessible by this test only The test pin Figure C 4 shall be inserted through holes intended to give access to pre set controls which require the use of a screwdriver or other tool The test pin shall be applied in every possible direction through the hole Penetration
122. or example transistors integrated circuits and capacitors are excluded from the requirements of this clause 81 IS 14254 Part 2 2006 IEC 61131 2 2003 11 5 3 Components 11 5 3 1 Non metallic components Non metallic components not subject to the requirements of 11 5 1 or 11 5 2 shall be used in accordance with their specified ratings and are excluded from the requirements of 11 5 11 5 3 2 Decorative and labelling materials Decorative materials cosmetic non metallic materials and labelling materials need not comply with 11 5 11 5 3 3 Internal wiring or interconnection cables Insulated wire used in unlimited circuits shall have a flammability classification of FV 1 or better according to IEC 60707 or an equivatent standard Wiring within limited power circuits has no flame retardant requirements 11 6 Temperature limits Temperature limits are as follows Component temperature limits Component parts and materials shall not be operated beyond their rated temperature limits or rated temperature rises Easily touched parts Parts likely to be touched by an operator in normal use or by service personnel as defined in Table 44 shall not exceed the temperature limits of Table 55 Field wiring terminals shall be monitored for the temperature during the temperature test This data is to be used in conjunction with the device rated ambient to determine the field wiring insulation temperature rating Table 55 Temperat
123. or by demonstrating the voltage control at the circuit when subjected to the impulse voltage test Table 58 77 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 50 Minimum clearances in air for micro environment where the voltages are known and controlled Peak voltage including all transients and impulses V Minimum clearances mm Pollution degree Up to 2000 m altitude 2 3 0 01 o 0 20 1 0 80 0 04 0 20 1 0 80 800 0 1 0 2 0 80 1500 0 5 0 5 0 80 2 500 1 5 1 5 15 4 000 3 0 3 0 3 0 6 000 5 5 5 5 5 5 8 000 8 0 8 0 8 0 1 For printed circuit boards the clearance for pollution degree 2 may be 0 04 mm for peak voltages of both 330 V and 500 V NOTE Table derived from IEC 60664 1 Clearances shall be verified by mechanical measurement or by dielectric withstand tests according to 12 2 1 without pre conditioning Clearances to walls of metal enclosures which may be deflected shall not be less than 12 mm 11 4 3 Creepage distances for basic and supplementary insulation A creepage distance cannot be less than the associated clearance so that the shortest creepage distance possible is equal to the required clearance However there is no physical relationship other than this dimensional limitation between the minimum clearance in air and the minimum acceptable creepage distance Creepage distances less then the clearances required in Table 47 Table 48 or Table 50 may only be
124. ordance with Table 52 but net Jess than the clearance specified in Table 49 11 5 Flame retardant requirements for non metallic materials 11 5 1 Non metallic enclosure material Non metallic enclosure material which forms part of the ultimate enclosure shall have suitable flame retardant properties to prevent or minimize the spread of flame and comply with a flame spread rating of 5VA FV2 FV1 or FVO Flame spread ratings are given in Clause 9 of IEC 60707 Non metallic enclosure materials used for decorative purposes for example labels or for functional purposes for example gaskets keypad overlays and which do not form an essential part of an enclosure require no special flame retardant additive and no flame rating 11 5 2 Non metallic material supporting live parts Non metallic materials used to support live parts such as printed circuit boards transformer bobbins battery housings etc including insulating barriers shall have suitable properties to prevent or minimize the spread of flame Examples of these properties are a flame rating of FVO FV1 or FV2 a glow wire test at 750 C with a 30 s application and an extinguishing time less than or equal to 30 s according to IEC 60695 2 1 and a comparative tracking index greater than or equal to 175 No tests are required if the PLC manufacturer provides evidence of compliance to the above referenced requirements or the equivalent Non metallic materials used in components f
125. osures of electrical equipment IS 15382 Part 4 2003 Insulation coordination for equipment within low voltage systems Part 4 Considerations of high frequency voltage stress IS 11000 Part 2 Sec 1 1984 Fire hazard testing Part 2 Test methods Section 1 Glow wire test and guidance IS 11731 Part 1 1986 Methods of test for determination of the flammability of solid electrical insulating materials when exposed to an igniting source Part 1 Horizontal specimen method IS 11731 Part 2 1986 Methods of test for determination of the flammability of solid electrical insulating materials when exposed to an igniting source Part 2 Vertical specimen method IS 13947 Part 5 Sec 1 2004 Specification for low voltage switchgear and controlgear Part 5 Control circuit devices and switching elements Section 1 Electromechanical contro circuit devices Degree of Equivalence Technically Equivalent do do do Identical do do Technically Equivalent do International Standard IEC 60950 1 2001 Information technology equipment Safety Part 1 General requirements IEC 61000 4 2 1995 Electromagnetic compatibility EMC Part 4 2 Testing and measurement techniques Electrostatic discharge immunity test IEC 61000 4 3 2002 Electromagnetic compatibility EMC Part 4 3 Testing and measurement techniques Radiated radio frequency electromagnetic field immunity test IEC 6
126. partial combinations of them which make sense but correspondingly exercise the appropriate ports of each EUT with an equipment part of the test bed the laboratory equipment necessary to test the EUT as would do the missing PADT TE RIOSs For practical reasons the manufacturer may elect to use actual PADTs TEs RIOSs to exercise the EUT ports At least 1 of each type or a representative number of I O ports of the EUT must be connected and be functional IS 14254 Part 2 2006 IEC 61131 2 2003 A selection of the representative functional modes shall be made considering that only the most typical functions of the PLC can be tested 2 3 Withstand test conditions In general the module which is in the manufacturer s catalogue should be tested alone providing that mixing several modules does not affect the result of the test Refer to those clauses dealing with withstand tests for specifics l 2 4 Verification procedure Type tests shall be conducted on the EUT s defined in 2 1 unless otherwise specified For each test the manufacturer shall specify how this configuration shall be installed and externally connected provide the suitable test programmes which shall be run during the test provide the proper operation verification procedure including the way to measure accuracy and temporary deviations of analogue I Os The appropriate test programmes and proper functioning verification procedures provided by the manufact
127. pe of standard link interface i e RS 232 RS 422 RS 485 RS 511 etc functional and safety earthing specifications procedures for making breaking logical and physical connection of a RIOS to a PLC system for example on line 52 IS 14254 Part 2 2006 IEC 61131 2 2003 7 15 Information on peripherals PADTs TEs HMIs The manufacturer shall provide the following information through convenient documentation and marking clear warnings and precautions to be observed when using functions enabling alteration of control conditions such as PLC system status modification changing of data or programmes in the memory forcing input or output signal etc usability of peripherals at RIOSs service conditions for peripherals which are intended for use in an environment less severe than stated in Ciause 4 such peripherals may need to be remotely connected to the rest of the PLC system through communication lines specifications for the selection of adequate cables and other devices needed for the communication link specifications for proper installation of the whole system including proper selection of energy source s type of communication network point to point star multi drop ring etc principles procedures and transmission speeds used on the communication link and their capability to transfer data from and to the RIOSs with respect to error coding detection and to the delays of tr
128. pear on mains power supply lines as a result of power interruptions to high energy equipment for example blown fuse on 1 branch in a 3 phase system This will cause high current pulses at relatively low voltage levels approximately 2 x Uneak The user shall take the necessary steps to prevent damage to the PLC system for example by interposing a transformer 4 5 Special conditions and requirements When the service conditions are more severe than those given in 4 1 4 2 4 3 and 4 4 or other adverse environmental conditions exist for example air pollution by dust smoke corrosive or radioactive particles vapours or salts attack by fungi insects or small animais the manufacturer should be consulted to determine suitability of the equipment or the steps to be taken 5 Functional requirements A typical PLC system and its interfaces ports are shown in Figure 2 19 IS 14254 Part 2 2006 IEC 61131 2 2003 Key Al Ar Be nmo Rer Peripherals permanently non permanently installed Digital and analogue lt input signat interface port 1 0 power interface port Remote 10s Digital and anatogue Cc Da output signal interface port Local extension rack 1 0 power interface port Basic PLC Communication signals interface port with third party devices computers printers fieldbus etc Memory ies and E K Auxiliary power output interface port
129. pen equipment is to be incorporated into other assemblies manufactured to provide safety 11 1 3 Enclosed PLC system equipment Enclosed PLC system equipment is equipment which is enclosed on all sides with the possible exception of its mounting surface to prevent personnel from accidentally touching live or moving parts contained therein to protect the equipment against ingress of 12 5 mm diameter and greater solid foreign bodies and meeting requirements of mechanical strength flammability and stability where applicable The protection degree must be IP20 NOTE IP ratings as defined in IEC 60529 As part of the requirement to provide protection against electrical shock each entity of an enclosed PLC system shall comply with the requirements of class see 11 1 3 1 class II see 11 1 3 2 class Ill see 11 1 3 3 or a mix thereof The protection degree shall be 2 IP20 Protection against electric shock shall be provided for those interfaces that are intended for operator access see Table 44 for clarification 11 1 3 1 Class I equipment Class equipment is equipment in which protection against electric shock does not rely on basic insulation only but which includes an additional safety precaution in such a way that means are provided for the connection of accessible conductive parts to the protective earth conductor in the fixed wiring of the installation in such a way that accessible conductive parts cannot become live in t
130. poses such as radiofrequency interference suppression provided the double insulation system is still provided for protective purposes 11 1 3 3 Class Ill equipment Class Ul equipment is equipment in which protection against electric shock is provided by circuits supplied by safety extra low voltage SELV and where voltages generated do not exceed the limits for SELV Class Ill equipment may be provided with means for connection to the earthing terminals for functional purposes such as radiofrequency interference suppression Wiring for SELV PELV circuits shall be either segregated from the wiring for circuits other than SELV PELV or the insulation of all conductors shall be rated for the higher voltage Alternatively earthed screening or additional insulation shall be arranged around the wiring for SELV PELV circuits or around the wiring of other circuits 71 IS 14254 Part 2 2006 IEC 61131 2 2003 11 1 4 Dielectric strength The dielectric withstand type test of 12 2 1 shall be performed between all parts and circuits where basic reinforced or double insulation are specified for protection against electric shock However the dielectric withstand type test of 12 2 1 need not be carried out between SELV PELV circuits and operator accessible conductive parts frames enclos ures earth terminal etc on units parts of the basic PLC system which have been tested separately according to the relevant standards provid
131. rademark or other identification model catalogue number type designation or name hardware serial number or series and or revision level see 1 2 and date code or equivalent information on replaceable fuses including current voltage and type live parts see 11 15 2 and protective earth terminals see 11 15 3 markings shall be as required 41 15 41 External wiring terminals identification External wiring terminals shall be marked to indicate the proper connections for the power supply load control circuit and the like or a wiring diagram coded to the terminal marking shall be provided A marking or manufacturer s installation instructions shall be provided to identify the temperature rating of field wiring to be connected to the wiring terminals 86 IS 14254 Part 2 2006 IEC 61131 2 2003 11 15 2 Live parts A live part exceeding SELV limits and likely to be mistaken as dead metal non energized metal and exposed to service personnel shall be marked with the following dangerous voltage symbol NOTE Symbol according to IEC 60417 5036 11 15 3 Protective earth terminals markings The protective earth terminal markings shall be durable and clearly identifiable The identification shall be achieved by the notation PE or by a graphical symbol for use on equipment or by the colour green yellow NOTE 1 Notation PE according to 5 3 of IEC 60445 NOTE 2 in North America the colour green only is als
132. rage time information relative to volatile memory if different from stated durations it shall be possible to change or refresh power back up without loss of data in the backed up portions of memory See also 4 3 7 6 item 8 and 7 13 item 4 If a memory back up battery is provided a warning of low battery voltage shall be provided Requirements of this subclause are verified in accordance with 6 3 4 2 Digital Os Figure 3 gives an illustration of definitions of some I O parameters Source Source ommon Reference PLC system Current sinking PLC input Current sourcing PLC Output Key Cc Output Mechanical or static contact for example dry relay contact triac transistor or equivalent E Earthings The earths shown are original Earthing is dependent on national regulations and or application needs Z Input Input impedance PS External power supplies NOTE Some applications may use only 1 PS common to inputs outputs and PLC system Figure 3 I O Parameters 22 IS 14254 Part 2 2006 IEC 61131 2 2003 Digital I Os shall comply with the following requirements The PLC system shall be provided with at least 1 type of input interface and 1 type of output interface among those defined respectively in 5 2 1 5 2 2 and 5 2 3 Digital inputs shall comply with the requirements of the standard voltage ratings given in 5 2 1 Non standard voltage digital inputs shoul
133. rals with the requirements set forth in this part of IEC 61131 This compliance verification includes verification by type tests given in Clauses 6 9 and 12 verification by suitable examination visual inspection or and measurement These tests are qualification tests and not tests related to the ways PLCs are employed According to the scope of this standard the above compliance verification may not cover the verification of the ability of the PLC system to satisfy the intended automated system requirements Where needed special tests not covered by this standard shall be agreed to by the manufacturer and the user In addition routine tests are specified in Clause 13 NOTE Peripherals used in the same environment as the PLC system must meet the same requirements as the PLC system 2 1 Equipment to be tested equipment under test EUT PLC systems span the range from stand alone products to modular designs this leads to an infinite variety of user built actual PLC system configurations For obvious practical reasons in most cases type tests cannot be conducted on EUT identical to user built PLC systems and engineering judgement is necessary Therefore the manufacturer is required to define the EUTs and document the corresponding test plan and test programmes to meet the following principles Combination of tests EUTs test programmes shall be such that one may reasonably think that any configuration built by the user accordi
134. ramme RIOSs shail be able to fix the states of their outputs to specified values within specified delays and without passing through unspecified states and be capable of providing a fault indication signal The MPU system shall provide the user s application programme with relevant information on the current status of RIOSs Requirements of this subclause are verified in accordance with 6 7 5 7 Peripherals PADTs TEs HMis requirements Peripherals which are not a permanent part of the PLC system shail cause no malfunction of the system when making or breaking communication with an operating system Requirements are verified in accordance with 6 2 5 Connectors for the peripherals shall be polarized to prevent improper connection or the PLC system shall be so designed that no malfunction occurs if a connection is improper The system consisting of the peripheral and the PLC system shall be designed to ensure that the edited programme executing in the PLC system is functionally identical to the edited programme displayed on the peripheral if on line modification of the application programme and or the modes of operation of the PLC system by a peripheral is possible i e when the PLC system is in active control of a machine or industrial process then the peripheral shall automatically give clear warnings equivalent to during on line modification programme display may differ from application programme control of the machin
135. rdous live the voltage current charge or energy between an accessible part and reference test earth or between any 2 accessible parts on the same piece of equipment within a distance of 1 8 m over a surface or through air shall not exceed the values of 11 1 1 1 in normal condition nor of 11 1 1 2 in single fault condition The accessible voltage shail be measured If the voltage is below the limit of 11 1 1 1 or 11 1 1 2 as applicable accessible current and capacitance need not be measured If the voltage exceeds that value the current and capacitance shall be measured 141 1 1 1 Values in normal condition Values above the levels of a b or c in normal condition are deemed to be hazardous live a The voltage levels are a c 30 Vr m s and 42 4 V peak or d c 60 V b If the voltage exceeds one of the values of a the current levels are a c 0 5 mAr m s for sinusoidal waveforms 0 7 mA peak for non sinusoidal waveform or mixed frequencies or d c 2 mA when measured with the measuring circuit of IEC 61010 1 Annex A Figure A 1 Alternatively the measuring circuit of IEC 61010 1 Annex A Figure A 2 can be used if the frequency does not exceed 100 Hz a c 70 mAr m s when measured with the measuring circuit of IEC 61010 1 Annex A Figure A 3 NOTE This relates to possible burns at higher frequencies c If the voltage exceeds one of the values of a the charge or energy of capacitance levels are 45 uC charge for vol
136. rified for performance and behaviour Initialization and reset conditions of all system components shall be checked for controlled start up and shut down The various modes such as run programme monitor shall be verified for performance and behaviour Any special feature performance not covered in this standard but necessary for the proper operation of the basic PLC system shall be exercised and tested 7 IS 14254 Part 2 2006 IEC 61131 2 2003 2 6 General conditions for tests The tests shall be carried out in accordance with the appropriate test procedure The tests shall be carried out under the general test conditions given in Table 1 unless otherwise specified Unless otherwise specified no sequence is imposed for type tests Table 1 General conditions for tests Mains power supply l Rated voltage and frequency Temperature 15 C to 35 C Relative humidity lt 75 Barometric pressure 86 kPa to 106 kPa 650 mm Hg to 800 mm Hg Output loads Outputs loaded to rated load Pollution Pollution degree 2 3 Terms and definitions For the purposes of this Part of IEC 61131 the following terms and definitions in addition to those given in IEC 61131 1 apply 3 1 analogue input device which converts a continuous signal to a discretely valued multi bit binary number for use by the PLC system 3 2 analogue output device which converts a multi bit binary number from the PLC system
137. rmonics AC voltage is in terms of the total r m s voltage values measured at the point of entry to the equipment 21 1S 14254 Part 2 2006 IEC 61131 2 2003 Total r m s content of true harmonics integral multiple of nominal frequency less than 10 times nominal frequency may reach 10 of the total voltage Harmonic and other frequency content for higher frequencies may reach 2 of the total voltage However to provide constant comparative results the equipment shall be tested at the third harmonic only 10 at 0 and at 180 phase angle The total content of harmonics of the power supply to the PLC system may be affected when the energy source output impedance is relatively high with regard to the input impedance of the PLC system power supply sizing a dedicated power source such as an inverter for a PLC system may require an agreement between the user and the manufacturer The use of line conditioner should be considered See IEC 61131 4 Requirements of this subclause are verified in accordance with 6 3 1 2 1 2 Memory back up Power back up for volatile memories shall be capable of maintaining stored information for at least 300 h under normal use and 1 000 h at a temperature not greater than 25 C when the energy source is at rated capacity For power back up needing replacement the rated capacity is the value used to designate the procedure and time interval for replacement The manufacturer should specify sto
138. rval between replacement of energy sources if applicable and recommended procedure and subsequent effects on the PLC system peak inrush current at cold start and warm restart or recommended fuse size and blowing characteristics 7 7 information on digital inputs current sinking The manufacturer shall provide the following information _ volt ampere curve over the full operating range with tolerances or equivalent digital input delay time for 0 to 1 and 1 to 0 transitions existence of common points between channels effect of incorrect input terminal connection isolation potentials between channel and other circuits including ground and between channels under normal operation type of input Type 1 Type 2 or Type 3 monitoring point and binary state of visual indicator effects when withdrawing inserting input module under power additional external load when interconnecting inputs and outputs if needed explanation of signal evaluation for example static dynamic evaluation interrupt release etc recommended cable and cord lengths depending on cable type and electromagnetic compatibility terminal arrangements typical example s of external connections 7 8 Information on digital outputs for alternating currents current sourcing The manufacturer shall provide the following information with respect to digital outputs for a c operation type of protection i e protected short circuit proof non
139. ry ies processing unit s etc shall be used to build the relevant EUT s Ifa local bus extension is part of the PLC system and if its maximum cable length cable is less than or equal to 3 m it is considered to be an internal PLC bus As such it should not be considered a port for test If a local bus extension is part of the PLC system and is capable of driving cables with a length of gt 3 m then only 1 end of the link is part of the EUT and it is considered as a communication port When new units modules are introduced after initial release of a PLC system catalogue which has already been satisfactorily tested according to this standard EUT s simpler than those originally used can be defined This is only permissible if such EUTs and the associated test programmes provided by the manufacturer allow proper verification as if these new units modules had been tested within the originally tested EUTs Unless otherwise specified in this standard the manufacturer may elect either that each type test be conducted on a new EUT or that several type tests be performed successively on the same EUT Certain tests can be easily targeted at a single item others are more appropriate to a set of items configured together Equipment to be tested must reflect this need See specific test clauses for recommendations for EUTs we ceil IS 14254 Part 2 2006 IEC 61131 2 2003 2 2 Special features for immunity and EMC tests Inter
140. s A Limits See Table 27 1 The measurement distance is the distance between the EUT or its enclosure and the receiving antenna for test site measurements or the measurement distance is the distance between the exterior wall of the building in which the equipment is situated and the receiving antenna for in situ measurements 2 Tests may be conducted on radiation test sites which do not have the physical characteristics of an open air test site An alternative radiation test site in the frequency range 30 MHz to 1 GHz shal be acceptable if the horizontal and vertical site attenuation measurements made according to 16 6 of CISPR 16 1 are within 4 dB of the theoretical site attenuation as given in CISPR 16 1 Table G 1 G 2 or G 3 Alternative radiation test sites shall allow for and be validated for the measurement distance in the frequency range of 30 MHz to 1 GHz Evidence shall be obtained to show that such alternative sites will yield valid results 9 4 Measurement of conducted interference Table 35 Conducted emission measurement Test configuration and method In accordance with CISPR 11 CISPR 16 1 and 2 Applicable ports AC power port F 1 Details of mounting support Installed according to manufacturer s specifications Frequency range See Table 27 Class A limits 2 See Table 27 1 DC mains are under consideration 2 Impulse interference click which occurs less t
141. s its diameter after removal of the common elements armour sheaths fillers Clearances between terminals and terminal to earthed parts are given in 11 4 1 2 11 9 Provisions for protective earthing The requirements specified below do not apply to SELV circuits where protective earthing is not required 11 9 1 Protective earthing constructional requirements The accessible parts of Class equipment for example chassis framework and fixed metal parts of metal enclosures other than those which do not constitute a danger shall be electrically interconnected and connected to a protective earth terminal for connection to an external protective conductor This requirement can be met by structural parts providing adequate electrical continuity and applies whether the equipment is used on its own or incorporated in an assembly 83 IS 14254 Part 2 2006 IEC 61131 2 2003 Cords or cables that supply power to Class portable peripherals shall be provided with a protective earthing conductor Protective earthing conductor insulation if provided shall be green with a yellow stripe NOTE In North America the colour green is also acceptable Accessible isolated conductive parts are considered not to constitute a danger if they are so located as to exclude any contact with live parts and withstand the dielectric test voltage of Table 59 for reinforced insulation corresponding to the highest rated operational voltage of the unit
142. s referred to in Figure 11 F K C D etc correspond to those referred to in Figure 2 They describe interface ports Zone C Factory mains isolated from public mains by dedicated transformer primary surge protection and severe interference coupling Zone B Dedicated power distribution secondary surge protection and moderate industrial interference coupling Zone A Local power distribution protected I O impedance limiting and low interference coupling 55 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 28 EMC immunity zones EMC considerations Factory mains distribution Primary surge protection Severe voltage surge coupling High rated voltage 4000 V Dedicated power distribution Secondary surge protection Moderate voltage surge coupling lt 300 V rated voltage I O impedance limiting 2 000 V Local power distribution VO impedance limiting Low voltage surge coupling 120 V rated voltage 1000 V lt 100 V rated voltage 800 V lt 50 V rated voltage 500 V 8 3 2 Performance criteria Table 29 Criteria to prove the performance of a PLC system against EMC disturbances Performance criterion ener Operation Criterion During test After test The PLC system shall continue to operate The PLC system shall continue to operate as intended No loss of function or performance as intended according to PFVPs 2 5 Degradation of performance accepted The PLC system shall continue to operate ar as intended T
143. s than 12 mm The above clearances do not apply to printed circuit boards with protective coating complying with the test of 12 1 6 The above clearances do not apply where overvoitages are known and controlled Refer to 11 4 2 and Table 50 11 4 1 2 Field wiring terminal clearances Minimum clearances at field wiring terminals from terminal to terminal and from terminal to enclosure shall comply with the requirements of Table 49 Table 49 Minimum clearances in air at field wiring terminals Teer ge clearances Working voltage U AC V r m s or d c V Limited ratings To walls of metallic WENA Zi General use enclosures which 1 2 may be deflected 1 6 0 lt U 50 50 lt U 300 3 2 1 6 300 lt U 600 6 4 4 8 1 Applicable to devices having ratings not more than 15 A at 51 150 V 10 A at 151 300 volts or 5 A at 301 600 V 2 Applicable to devices which control more than one load provided that the total load connected at one time does not exceed 30 Aat 51 150 V 20 A at 151 300 V or 10 A at 301 600 V 11 4 2 Clearances for micro environment where voltages are known and controlled In the case where the peak voltages are known and controlled the minimum clearances corresponding to these peak voltages are given in Table 50 Peak voltages are considered to be known and controlled where the product design will limit the voltage to the appropriate value indicated in Table 50 This can be verified by examination
144. sioning instructions programming and troubleshooting instructions maintenance and service requirements and accessory and spare parts lists for example fuses 7 1 3 Information on technical documentation The manufacturer optionally may provide a set of documents which contain more information than those given in the user s manual such as schematic diagrams internal or external data protocols bus assignments physical dimension characteristics energy available firmware internal test programmes or repair procedures etc 7 2 Information on compliance with this standard The manufacturer shall provide information on compliance with this Part of IEC 61131 which can be claimed on two levels a full compliance with all of the requirements contained in all clauses of this part such as indicated by reference to IEC 61131 2 without qualification b compliance with a portion of this Part of IEC 61131 where documentation identifies the specific clauses of this part with which the product has been determined to comply See 1 2 for details 7 3 Information on reliability If the manufacturer provides values of the mean time between failures MTBF of any subassembly or module and of the type test configuration s PLC system s under normal service conditions the manufacturer shall also explain the method used to determine it 7 4 Information on other conditions The user should reach agreement with the manufactur
145. st Reference test IEC 61000 4 8 EUT configuration According to manufacture s specifications Initial measurements According to PFVP 2 5 Details of mounting support The EUT is immersed in the magnetic field of a 1 m x 1 m induction coil Frequency power line See Tabie 30 or Table D 1 Test condition Immersion method in continuous field Test field strength See Table 30 or Table D 1 Measurement and verification during loading According to PFVP 2 5 Performance criteria See Table 30 or Table D 1 1 1 For CRTs the performance criteria is B if the field is gt 3A m 63 IS 14254 Part 2 2006 IEC 61131 2 2003 9 8 Fast transient bursts Table 39 Fast transient burst immunity test Reference test IEC 61000 4 4 EUT configuration According to manufacturer s specifications Initial measurements According to PFVP 2 5 Details of mounting support The EUT shall be such as to eliminate the radiated EMI received on I O wiring by the specified capacitive coupling Severity level Atrated Voltage See Table 31 Tabie 32 or Table D 2 Duration 1 min minimum Apptication ports methods Communication Al Ar Be Bi and E I O C and D 50 200 pF capacitive clamp coupling VO Power J and auxiliary power output K AC DC power F 33 nF direct coupling Measurement and verification during loading According to PFVP 2 5 Performance criteria See Table 31 Table
146. stand testing must be performed within 1 h of the completion of the preconditioning Subclause 6 8 2 of IEC 61010 1 provides an alternate preconditioning method which may be utilized Preconditioning is not required for dielectric withstand testing following other tests One of the 3 test types impulse a c or d c shall be performed at the test voltage specified in Table 58 or Table 59 The test voltage is based on the highest working voltage of the circuits involved The choice of Table 58 or Table 59 is based on the insulation requirement specified in 11 1 Test characteristics Impulse test according to IEC 60060 1 and the following conditions Waveshape 1 2 50 us Source impedance 5002 10 Source energy 05J 20 Length of connection lt 2m Time between two impulses 25s AC voltage test Test time 1 min Voltage signal starting from 0 V zero crossing Short circuit current lt 5mA DC voltage test Test time 1 min Short circuit current lt 5 mA NOTE in general preference should be given to the impulse test however where filter capacitors are used line to earth the d c test is recommended The dielectric test voltage is applied between a isolated non SELV circuits b isolated non SELV circuits and SELV circuits and c isolated non SELV circuits and accessibie conductive parts The tests are carried out on each unit and module connected in the test circuit as shown in Figure 13 If required tests
147. sts Verify that all requirements are met Test procedures To be agreed upon by the user and manufacturer 6 4 4 2 Analogue input overload withstand test Test procedure To be agreed upon by the user and manufacturer Measurement and verification During loading During the application of specified maximal overload no physical damage or abnormal phenomenon shall be detected After the test The accuracy shall be verified for the minimal and the maximal value of the input range according to PFVP see 2 5 6 4 4 3 Short circuit test voltage output and open circuit test current output When the short circuit for a voltage output or the open circuit for a current output is realized no physical damage or abnormal phenomenon shall be detected After the test perform the proper functional verification procedure of 2 5 6 4 4 4 Voltage supply variation test This test shall be performed when the analogue I O modules are externally energized by an independent power supply i e independent from the other I O modules power supply ies of the PLC system The power supply is replaced by a variable power source The voltage is adjusted to the extreme values of the specified range of voltage supply The module shall then pass the PFVP and the output variations shall be inside the specified range see 2 5 43 IS 14254 Part 2 2006 IEC 61131 2 2003 6 4 4 5 Reversal of signal polarity test withstand test if the
148. sts and verifications Safety routine tests or an equivalent verification method see specifically clause 13 shall be performed by the manufacturer in accordance with 13 1 and 13 3 11 17 1 Requirement for dielectric strength verification Protection against electric shock shall be verified between 1 non SELV circuits and SELV circuits 2 non SELV circuits and accessible conductive parts and 3 isolated non SELV circuits This verification shall be performed by one of the following approaches Routine dielectric withstand testing of the product in accordance with 13 2 Verification during product development that all of the relevant insulating materials and creepage and clearance distances of the product and that all isolating components meet one of the following the component requirements of 11 12 100 dielectric withstand tested verification by measurement to meet the required creepage and clearance distances 11 17 2 Requirement for protective earthing verification The manufacturer shall verify protective earthing continuity between the protective earthing interface port and all operator accessible metal parts intended to be earthed in accordance with the test described in 13 3 11 18 Requirements for information on safety Information on safety shall be provided by the manufacturer in accordance with Clause 14 12 Safety type tests and verifications 12 1 Safety related mechanical tests and verifications 12
149. supply with 0 and 180 igure 9 5 min According to PFVP 2 5 According to PFVP 2 5 Test duration for each phase Measurement and verification during loading Verification after tests 1 If there are separate mains supplies to the PLC system the test may be carried out on each supply separately 37 IS 14254 Part 2 2006 IEC 61131 2 2003 Third harmonic generator Power supply source PLC system Figure 9 Third harmonic immunity test 6 3 1 3 Shut down test sudden supply interruption Test description during shut down due to the supply interruption the system behaviour shall be observed The test is repeated twice Performance criteria The requirement given above shall be met in addition from the start of interruption to shut down there shall be no change not caused by the normal test programme and no erratic or unintended condition of any kind i 6 3 1 4 Start up test When the external supply is applied for a time specified by the manufacturer the PLC system shall start again according to the specifications of the manufacturer automatic or manual restart initialization sequence etc During the start up there shall be no erratic or unintended condition 6 3 2 External energy supply variation tests immunity tests At voltages below the minimum normal service conditions limits and or frequencies beyond the normal service condition limits t
150. t tmmunity test Preconditioning According to manufacturer s specification According to PFVP see 2 5 conditioning Low temperature 5 C 2 C High temperature Open equipment Enclosed equipment 40 C 3 C 5 70 C 2 C 70 C 2 C 55 C 2 C 40 C 2 C __Numberofeyss E A S Recovery procedure IEC 60068 2 14 test Na Not applicable Less than 2 h Not applicabile See 6 1 and 2 6 4 Not applicable Power supply Power supply unconnected 1 PFVP according to 2 5 performed after recovery 2 PFVP according to 2 5 performed during test 3 Multi channel output modules shall be derated as specified by the manufacturer 4 All external and internal condensation shall be removed by airflow prior to connecting again the basic PLC system to a power supply 5 Time Climatic conditions Not applicable 25 C 3 C is acceptable but not recommended for future designs 33 IS 14254 Part 2 2006 IEC 61131 2 2003 6 1 3 Cyclic damp heat withstand test Table 14 Cyclic 12 12 damp heat test Reference test IEC 60068 2 30 test Db Preconditioning According to manufacturer s specifications Initial measurements According to PFVP 2 5 oe conditioning Petas ormeuntingloupser CN oe a a E Special precautions Recovery procedure Time Climatic
151. tages up to 15 kV peak or d c 350 mJ stored energy for voltages above 15 kV peak or d c 11 1 1 2 Values in single fault condition Values above the levels of a b or c in single fault condition are deemed to be hazardous live 69 IS 14254 Part 2 2006 IEC 61131 2 2003 a The voltage levels are a c 50 V r m s and 70 V peak or d c 120 V b If the voltage exceeds one of the values of a the current levels are a c 3 5 mA r m s for sinusoidal waveforms 5 mA peak for non sinusoidal waveform or mixed frequencies or d c 15 mA when measured with the measuring circuit of IEC 61010 1 Annex A Figure A 1 Alternatively the measuring circuit of IEC 61010 1 Annex A Figure A 2 can be used if the frequency does not exceed 100 Hz a c 500 mA r m s when measured with the measuring circuit of IEC 61010 1 Annex A Figure A 3 NOTE This relates to possible burns at higher frequencies c If the voltage exceeds one of the values of a the capacitance levels are those of IEC 61010 1 Figure 2 11 1 2 Open PLC system equipment Open PLC system equipment is equipment that may have live electrical parts accessible for example a main processing unit Protection against electric shock shall be provided for those interfaces that are intended for operator access see Table 44 for clarification No other means of protection against electric shock are required except the enclosure required for the ultimate application O
152. talled PLC system shall be capable of operating an alarm signal on an alarm output When the system is monitored as functioning correctly this alarm output shall be in a predetermined state in the other case it shall go to the opposite state The manufacturer shall specify the conditions of the correct functioning state and the self tests which are executed to drive this alarm output RIOSs shall be capable of operating an alarm signal on an alarm output for example through a digital output module in the event of loss of power or loss of normal communication with the MPU and go to a predetermined state see 5 6 Requirements of this subclause are verified in accordance with 6 9 5 9 Functional earthing There are no constructional requirements such as interference immunity control RFI protection etc for functional earthing terminals except for marking requirements as given in 5 11 3 5 10 Mounting requirements Provisions shall be made for securely mounting equipment to a supporting surface Alternate mounting methods such as DIN rails should also provide for secure mounting of the equipment A bolt screw or other part used to mount a component of the equipment shall not be used for securing the equipment to a supporting surface DIN rail etc 31 IS 14254 Part 2 2006 IEC 61131 2 2003 5 11 General marking requirements For all equipment as a minimum the information marked on the device shall ident
153. talled by the manufacturer 3 32 isolated devices circuits devices or circuits without galvanic connection between them 3 33 live part conductor or conductive part intended to be energized in normal operation including a neutral conductor but by convention not a PEN conductor or PEM conductor or PEL conductor NOTE 1 This concept does not necessarily imply a risk of electric shock IEV 60195 02 19 NOTE 2 PEN conductor conductor combining the functions of both a protective earthing conductor and a neutral conductor LEV 60195 02 12 NOTE 3 PEM conductor conductor combining the functions of a protective earthing conductor and a mid point conductor IEV 60195 02 13 NOTE 4 PEL conductor conductor combining the functions of both a protective earthing conductor and a line conductor IEV 60195 02 14 IEV 60195 02 19 3 34 mains power supply power from the conductors mains of the permanent installation of the building at the supply voltage to the PLC system 3 35 material group classification of insulating materials in terms of comparative tracking index CTI range see 11 4 3 3 36 micro environment ambient conditions which surround the clearance or creepage distance being reviewed NOTE The micro environment of the clearance or creepage distance and not the environment of the equipment determines the effect of the insulation The micro environment may be better or worse than the environment of the equipment It in
154. temperature coefficient 3 Maximum error over full temperature range 4 Digital resolution 5 Data format returned of the application programme 6 Value of a LSB least significant bit 7 Maximum permanent allowed overload no damage 8 Digital output reading under overload condition 9 Type of input 10 Common mode characteristics d c a c 50 Hz a c 60 Hz if applicable 11 For other inputs thermocouples RTD etc e type s sensor s J K T etc Pt 100 etc e measurement range s Min C to max C linearization method Internal or user provided 7 10 2 Information on analogue input dynamic characteristics Dynamic characteristics Units and examples 1 Sample duration time including setting time ms 2 Sample repetition time ms 3 Input filter characteristics order First second etc Hz of full scale e transition frequency Maximum temporary deviation during each specified electrical interference test 4 7 10 3 Information on analogue input general characteristics General characteristics Units and examples 1 Conversion method Dual siope S A etc 2 Operating modes Trig self scan etc 3 Type of protection RC opto isolator MOVs etc vV 4 isolation potentials under normal operation between channel and a other circuits including ground b between channels c power supply ies and d interface s i
155. the basic PLC system shall be according to PFVP 2 5 at minimum operational voltage and frequency gradual shut down of 6 3 1 1 and at maximum operational voltage and frequency fast variations of 6 3 1 1 Description of tests Fast variations Stow variations See Figure 8 See Figure 10 Initial final conditions Power supply at rated values Ue min Fn Lowest voltage U 0 zero i 0 9 SDL 10 1 Waiting time at lowest voltage s O zero 0 zero Number of trials 3 3 Time interval between trials s lt time interval lt 5s Measu ement and verification during loading l According to PFVP 2 5 Pass fail criteria According to 6 3 2 1 SDLa is a result of the gradual shut down test see 6 3 2 1 39 IS 14254 Part 2 2006 IEC 61131 2 2003 Uv 60s 10 60s 10 Ue min 0 9 SDLav 10 1s lt time lt 5s Figure 10 Siow supply voltage variation test 6 3 3 Improper power supply connection tests 6 3 3 1 Reversal of d c power supply polarity test withstand test The rated voltage of reverse polarity shail be applied for 10 s The results shall comply with the conditions stated by the manufacturer such as fuse blowing After the test the basic PLC system shall pass the proper verification procedure see 2 5 Protective devices such as fuses may be reset prior to verification 6 3 3 2 Improper voltage level and or frequency test For voltage level above the maximum normal service condit
156. tions See Figure 7 k 0 85 k 0 94 k 0 85 k 0 05 30 min See Figure 8 k 1 10 k 1 04 k 1 20 k 0 05 30 min AC voltage k xU 2 AC frequency k x Fh 2 DC voltage k x Ue 2 Ripple continuous k x U 2 Test duration Measurement and verification during loading According to PFVP 2 5 According to PFVP 2 5 Verification after tests Performance criteria 1 1f there are separate mains supplies to the PLC system the tests may be carried out on each supply separately 2 See precise definitions in Table 6 36 IS 14254 Part 2 2006 IEC 61131 2 2003 UNV 60 s 10 TEOR 60 s 10 Ue en bn nnn nn nnn nnn nn nnn nen nnn nana sg Ue min SDL Shut down PC system starts shut down procedure or initiates abnormal procedure According to manufacturer s specification or 10 s 20 oe ee a ene Figure 7 Gradual shut down start up test s 10 5 s 10 UV a Figure 8 Fast supply voltage variation test 6 3 1 2 Third harmonic immunity test Table 21 Third harmonic immunity test eterencetest Ce A According to manufacture s specifications According to PF VP 2 5 EUT configuration Initial measurements Description of tests 1 A third harmonic voltage 150 Hz or 180 Hz adjusted to 10 of the mains rated voltage is added to the a c mains power
157. to a continuous signal 3 3 accessible able to be touched by the jointed test finger or test pin when installed as intended See 12 1 2 12 1 3 and Annex C 3 4 basic PLC system configuration which consists at a minimum of a processing unit power supply and I O See Figure 2 3 5 battery electrochemical energy source which may be rechargeable or non rechargeable 3 6 clearance shortest distance in air between two conductive parts IEC 60664 1 IS 14254 Part 2 2006 IEC 61131 2 2003 3 7 coating protective covering of suitable insulating materiai that encloses the clearance and or creepage distance of the printed wiring board and conforms to the surface of the board in such a manner that the environment is excluded and the clearance and or creepage distance can withstand the required impulse and continuous potential NOTE Coating is normally applied to exclude the effects of atmosphere and to increase the dielectric properties of the clearance and or creepage distances that would not normally be adequate without coating A iess effective coating may exclude the atmosphere but cannot be relied on to enhance the dielectric properties 3 8 comparative tracking index CTI numerical value of the maximum voltage at which a material withstands 50 drops of NH CI solution ammonia chloride without tracking IEC 60112 3 9 creepage distance shortest distance along the surface of the insulating material between tw
158. tputs shall withstand any overload up to open circuit 3 Not recommended for future designs 29 IS 14254 Part 2 2006 IEC 61131 2 2003 5 4 Communication interface requirements The configuration tested according to Clause 2 of this Part of IEC 61131 shall be equipped with communication interface modules where applicable and with communication links specified by the manufacturer Requirements of this subclause are verified in accordance with 6 5 5 5 Main processing unit s and memory ies of the PLC system requirements This subclause should be read in conjunction with IEC 61131 1 and with 5 6 and 5 7 of this part respectively RIOSs and peripherals See Figure 2 and Annex A for the definition and illustration of the PLC system the main processing unit MPU the main memory and other terms used in this subclause Main processing unit s and memory ies are part of the permanent PLC installation and therefore tested accordingly Requirements of this subclause are verified in accordance with 6 6 5 6 Remote input output stations RIOSs requirements RIOSs are part of the permanent PLC installation and therefore to be tested accordingly However for ease of testing isolated RIOSs may be tested separately where appropriate Requirements for voltage drops and interruption of the power supply ies fully apply to RIOSs These requirements are shown in 8 3 4 In case of loss of communication with the MPU application prog
159. ular axes 0 5 g constant acceleration i Requirements of this subclause are verified in accordance with 6 2 1 4 2 2 Shock ret Immunity requirements are occasional excursions to 15 g 11 ms hailf sine in each of 3 mutually perpendicular axes Devices containing CRTs are excluded from this requirement Electromechanical relays may temporarily respond to 15 g shocks Temporary malfunctioning is allowed during the test but equipment should be fully functional after the test Requirements of this subclause are verified in accordance with 6 2 2 4 2 3 Free falls portable and hand held equipment Immunity requirements for free falls are Table 4 Free fall on concrete floor for portable and hand held equipment Portable and hand held Hand held Normative items any weight withstand any weight immunity Random drops 1 000 mm 2 trials 1 2 4 Flat drops 100 mm 2 trials a 1 4 Supported drops 30 or 100 mm 2 trials 1 3 4 1 Caution temporary malfunctioning is allowed at the impact but equipment shall be fully functional after the test Therefore if equipment is operating during the fall erroneous operation could be introduced upon impact which may require Operator correction 2 From prescribed altitude normal position of use Table 17 3 See Table 17 4 Random drops are drops on any edge surface or corner Flat drops are only on surfaces Supported drops are only on edges
160. ure limits Absolute maximum Access time Non metallic Examples temperatures Operator hand held equipment Continuous 55 C 70 C Hand held terminals Operator parts normally touched in Momentary 70 C 85 C Push buttons operation on cabinet Parts accessible during servicing Momentary 70 C 85 C Key switches normally touched in operation on PLC j Parts accessible during servicing Momentary 100 C 1 100 C 1 Heatsinks not normally touched in operation 1 A warning label is necessary if the temperature exceeds the level shown See Clause 14 11 7 Enclosures Enclosures shall provide protection against the hazards of moving parts and contact with live parts Enclosures for equipment shall comply with the requirements of 11 7 1 or 11 7 2 as applicable 82 IS 14254 Part 2 2006 IEC 61131 2 2003 11 7 1 Open equipment Housings of open equipment are not considered to be an enclosure The manufacturer s installation instructions shall specify how open equipment shall be installed so that it will meet the enclosure requirements of this standard 11 7 2 Enclosed equipment Enclosed equipment shall meet IP20 requirements as a minimum This protection shall also be provided under all conditions of operator use 11 7 2 1 Shafts and knobs Conductive keypads shafts and knobs external to the enclosure shall not be in contact with hazardous live parts If the parts are normally held or actuated in normal use the insu
161. ure of insulating material which envelops all conductive parts with the exception of small parts such as nameplates screws and rivets which are isolated from hazardous live parts by insulation at least equivalent to reinforced insulation 2 metal encased class Il equipment equipment having a substantially continuous metal enclosure in which double insulation is used throughout except for those parts where reinforced insulation is used 3 equipment which is a combination of types 1 and 2 NOTE 1 The insulated enclosure of a class 1 equipment may form a part of the whole of the supplementary insulation or of the reinforced insulation NOTE 2 If equipment with double insulation and or reinforced insulation throughout has a protective earthing terminal or contact it is deemed to be of class construction NOTE 3 Class II equipment may have parts operating at safety extra low voltage Protective impedance may be used in lieu of double insulation provided the protective impedance limits the accessible conductive parts to a current of 5 mA or limits open circuit voltage to values for SELV Class It equipment may be provided with means for maintaining the continuity of circuits i e grounded internal components or conductive surfaces provided that these circuits are double insulated from the accessible circuits of the equipment Class Il equipment may be provided with means for connection to the earthing terminals for functional pur
162. urer shall satisfy the requirements given in 2 5 2 5 Requirements for test programmes and proper functioning verification procedures PFVPs to be provided by the manufacturer During the type tests there shall be no destruction of hardware unless required by the test modification of the operating system and test programmes and or alteration of their execution unintended modification of system and application data stored or exchanged erratic or unintended behaviour of the EUT deviation of the analogue I Os out of the limits specified in item 4 of 710 2 and item 3 of 7 11 2 All relevant functions and parts of the EUT i e units and modules shail be functioning in such a way that the information paths to from these functions and parts are exercised All the I O and communication channels of the EUT shall be exercised NOTE It is acceptable to apply statistical criteria based on samples for large number of Os etc for example gt 100 l All external and internal product status information reporting means such as displays lamps alarm signals self test result registers shall be exercised The test procedures shall include conditions to verify the related activities All various PLC system operation modes significant for the user s implementation such as start up and shut down cold warm hot restart normal run normal stop programme monitor with PADTs etc as applicable shall be ve
163. used under conditions of pollution degrees 1 and 2 when an impulse withstand voltage test according to Table 58 and Table 59 is also sufficient for the clearance distances This can occur when the circuit design uses a homogeneous field configuration which can achieve a greater impulse withstand voltage at the same clearance than an inhomogeneous field design NOTE See IEC 60664 1 for an explanation of homogeneous and inhomogeneous fields Insulating materials are separated into 4 groups by their comparative tracking index CT values The creepage distances are dependent on the CTI of the particular material specified in Table 51 78 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 51 Classification of material group according to comparative tracking index CTI Material group 100 s CTI lt 175 175 lt CTI lt 400 400 lt CTI lt 600 600 lt CTI NOTE 1 tnsulating material separation groups are ac cording to IEC 60664 1 NOTE 2 Comparative tracking index values are accord ing to IEC 60112 11 4 3 1 Minimum creepage distances basic and supplementary insulation 11 4 3 1 1 Minimum creepage distances for other than printed circuit boards Creepage distances shall be not less than values given in Table 52 nor less than the appropriate clearances Table 52 Minimum creepage distances for other than printed circuit boards 1 Creepage distances mm 3 Pollution degree 2 Pollution degree 3 Material
164. wave immunity test Reference test IEC 61000 4 12 According to manufacturer s specifications EUT configuration Initial measurements According to PFVP 2 5 9 11 Details of mounting support According to manufacturer s specifications Test description Damped oscillating wave the envelope of which reaches 50 of the initial peak value after 3 to 6 cycles verify the sinusoidal shape of the wave Waveform a 1 MHz 10 200 Q 10 unshielded 400 s 2s minimum Frequency Source impedance Repetition rate 2m maximum Test duration Length to connection See Table D 2 Severity level at rated voltage Application points method 1 0 C and D a c d c power F I O power J and auxiliary power output K Measurement and verification during loading According to PF VP 2 5 9 12 Voltage drops and interruptions Power port type tests and verifications Power ports are mains power input port port F Figure 2 Perform the proper functional verification procedure of 2 5 during tests 67 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 43 Voltage drops and interruptions immunity test Reference test EUT configuration According to manufacturer s specifications Initial measurements According to PFVP 2 5 Supply voltage and frequency Ue min to O zero V Fr Test description AC supply interruption Duration base 0 5 period starting at zero crossing 1 2 20 1s
165. ween separate conductive bodies JEV 60151 03 28 NOTE 3 To isolate To disconnect completely a device or circuit from other devices or circuits To provide by separation a specified degree of protection from any live circuit IEV 60151 03 29 3 29 1 basic insulation insulation of hazardous live parts which provides basic protection against electric shock under fault free conditions IEV 60195 06 06 and IEV 60195 06 01 NOTE This concept does not apply to insulation used exclusively for functional purposes Such insulation is referred to as functional insulation 3 29 2 double insulation insulation comprising both basic insulation and supplementary insulation IEV 60195 06 08 3 29 3 reinforced insulation l insulation of hazardous live parts which provides a degree of protection against electric shock equivalent to double insulation NOTE Reinforced insulation may comprise several layers which cannot be tested singly as basic or supplementary insulation IEV 60195 06 09 3 29 4 supplementary insulation independent insulation applied in addition to basic insulation for fault protection IEV 60195 06 07 11 IS 14254 Part 2 2006 IEC 61131 2 2003 3 30 interface shared boundary between a considered system and another system or between parts of a system through which information or electrical energy is conveyed 3 31 internal wiring wiring which is inside the PLC system equipment which is ins
166. wer supplies to the PLC system and to the externally powered 1 O modules shall be as shown in Table 6 Table 6 Rated values and operating ranges of incoming power supply Rated Tolerance Rated Tolerance Power 0 signals 5 U min max Fy min max supply DC 24 V 1 DC 48 V 15 20 1 2 DC 125V AC 24 V r m s 15 10 50 Hz or 60 Hz 6 4 AC 48 Vr m s AC 1 In addition to the voltage tolerances a total a c component having a peak value of 5 of the rated voltage is allowed The absolute limits are d c 30 19 2 V for d c 24 V and d c 60 38 4 V for d c 48 V Normative items and note 100 Vr m s AC 110 Vr m s AC 120 Vr m s AC 200 V r m s AC 230 V r m s AC 240 V r m s AC 400 V r m s Note Note AWDAAAA Dz dD D DDD Note 4 2 See Note 5 of Table 7 if Type 2 digital inputs are likely to be used 3 For incoming voltages other than those given in the table such as d c 110 V etc the tolerances given in the table and Note 1 apply These voltage tolerances shall be used to calculate the input limits of Table 7 using the equations in Annex B 4 Three phase supply 5 For power supplies for analogue I Os see item 5 of 7 10 3 and item 3 of 7 11 3 NOTE The rated voltages are derived from IEC 60038 Requirements of this subclause are verified in accordance with 6 3 1 1 1 2 Voltage ha
167. wiring terminals have to be considered Requirements of this subclause are verified in accordance with 12 1 8 11 4 1 Clearances relating to overvoltage category Il 114 4 1 1 Clearances for other than field wiring terminals Clearances associated with basic and supplementary insulation are given in Table 47 and clearances associated with double and reinforced insulation are given in Table 48 Table 47 Minimum clearances in air corresponding to overvoltage category Il conditions except for field wiring terminals for basic supplementary insulation Minimum clearance mm Working voltage U a c V r m s or d c V Pollution degree 2 1 For printed wiring material the values for pollution degree 1 apply except that the value shali not be less than 0 04 mm 2 For d c products this range ends at 60 V NOTE Table derived from IEC 60664 1 76 IS 14254 Part 2 2006 IEC 61131 2 2003 Table 48 Minimum clearances in air corresponding to overvoltage category Il conditions except for field wiring terminals for double reinforced insulation Working voltage U mm a c V r m s or d c V Pollution degree 0 1 0 2 0 8 t For d c products this range ends at 60 V NOTE Table derived from IEC 60664 1 Clearances shall be verified by mechanical measurement or by dielectric withstand tests according to 12 2 1 without pre conditioning Clearances to walls of metal enclosures which may be deflected shall not be les

IS 14254-2 (2006): Programmable controllers, Part 2: Eqipment

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