Home

IS/IEC 1131-2 (1992): Programmable Controllers, Part 2: Equipment

1. Preconditioning Initial measurements Details of mounting support The basic PC system shall be operated with all 1 O modules at their rated ON operating conditions 100 duty cycie Loading According to PFVP 6 3 2 2 According to PFVP 6 3 2 2 Measurement and verification during loading Verification after the tests 6 3 5 5 7 Protective coating test Requirement reference subclause 4 3 3 1 2 NOTE Alternative tests are under consideration 1 Testing shall be done on test PWBs with parallei printed conductors with a length of at least 100 mm whereby the creepage distances have to be in accordance with the actual application For the test PWB the same coating material the same PWB material and the same manufacturing processing procedure shall be used as during the normal equipment manufacturing procedure 82 ISAEC 1131 2 1992 2 The test shall be done on three test PWBs The sequence of tests shall be a ageing of samples 6 dielectric test Cc adherence test 3 Ageing of samptes Reference test IEC 68 2 3 test Ca test time warm damp constant 56 days storage time and conditions 28 days at 110 C pass fail criteria the dielectric test and the adherence test have to be passed thereafter 4 Dielectric test Procedure Select the d c test technique and test voltage levels in accordance with the applicable dielectric withstand require
2. J ae l prem Cc ig interference source IEC 962 92 Figure 9 Connection diagram for damped oscillatory wave test series mode norma mode 6 3 7 Verification of a c and d c power supply characteristics Perform the proper functional verification procedure of 6 3 2 2 during tests under 6 3 7 1 6 3 7 2 and 6 3 7 3 6 3 7 1 Incoming power supply voltage and frequency variation tests 6 3 7 1 1 Voltage and frequency range test Table 47 Voltage and frequency range immunity test note 1 Preconditioning According to manufacturer s specifications Initial measurements According to PFVP 6 3 2 2 Description of tests TestA Test B e a c voltage k x U note 2 0 85 1 10 e a C frequency kx Fa note 2 0 95 1 05 d c voltage k x Ua note 2 0 85 1 20 e ripple continuous k x Up note 2 0 05 0 05 e test duration 30 min 30 min Measurement and verification during loading According to PFVP 6 3 2 2 Verification after tests According to PFVP 6 3 2 2 NOTES 1 If there are separate mains supplies to the PC system the tests may be done on each supply separately 2 See precise definitions in 3 2 1 1 91 ISNEC 1131 2 1992 6 3 7 1 2 Third harmonic immunity test Table 48 Third harmonic immunity test Reference test Preconditioning According to manufacturer s specifications Initial measurements According to PFVP 6 3 2 2 Description of tests A third harmonic voltage 150 Hz
3. Measurement and or loading during conditioning None Note 4 Recovery e procedure IEC 68 2 14 test Na Less than 2h See 6 3 3 note 5 Not applicable e time Not applicable e climatic conditions Not applicable e power supply Power supply unconnected According to PFVP 6 3 2 2 Final measurements NOTES 1 PFVP according to 6 3 performed after recovery 2 PFVP according to 6 3 performed during test 3 The time for stabilization of temperature depends on the load and the test program this time is included in the exposure time 4 Multichannel output modules shall be derated as specified by the manufacturer 5 All external and internal condensation shall be removed by air flow prior to connecting again the basic PC system to a power supply 75 ISHEC 1131 2 1992 6 3 4 4 Cyclic damp heat withstand test Table 33 Cyclic 12 12 damp heat withstand test Preconditioning According to manufacturer s specifications According to PFVP 6 3 2 2 Initial measurements Conditioning None Details of mounting support None 2 Power supply disconnected Variant Special precautions Temperature 55 C 2 Number of cycles Measurement and or loading during conditioning Recovery procedure e time e climatic conditions Under controlled conditions prescribed
4. 2 Clearances to walls of metal enclosures which may be deflected shall not be less than 12 mm 52 etA ey eds ae Ena ISMEC 1131 2 1992 4 3 3 Creepage distances for basic and supplementary insulation Since creepage distances are at least equal to or greater than clearances the actual values shall be selected to meet the requirements of both this subclause and subclauses 4 3 1 or 4 3 2 as applicable Table 21 Classification of material group according to comparative tracking index CTI Definitions and entries in this table are derived from IEC 664 Material group 100 lt CTI lt 175 175 lt CTI lt 400 400 lt CTI lt 600 600 lt CTI See IEC 112 for the method of determining CTI 4 3 3 1 Minimum creepage distances basic and supplementary insulation Minimum creepage distances given in this subclause are for a c r m s or d c voltages which contain no impulse For micro environment where impulse voltage will be present e g overvoltage category Il or recurring peak voltages other additional requirements apply See respectively 4 3 1 and 4 3 3 2 4 3 3 1 1 Minimum creepage distances for other than printed wiring boards Creepage distances shall be not less than values given in table 22 nor be less than the appropriate clearances 53 ISMEC 1131 2 1992 Table 22 Minimum creepage distances in millimetres for other than printed wiring boards note 1 Definitions and entries in
5. Measurement and verification during loading According to PFVP 6 3 2 2 Pass fail criteria The repeatability of this test is closely related to the number and relative position of wires within the capacitive coupling 89 ISAEC 1131 2 1992 Reference test IEC 255 4 Requirement reference Subclause 3 9 1 initial measurements Test description e frequency e source impedance repetition rate e test duration e severity level at rated voltage A all power supplies B digital Os Uo 2 24 V C digital VOs U lt 24 V aa analog I Os communication I Os e Application points method A B Measurement and verification during loading e length of connection Pass fail criteria According to PFVP 6 3 2 2 See figure 9 below Damped oscillating wave the envelope of which reaches y T UATU Gt k a bad aiad w 0 of the initial peak value after 3 to 6 cycles verity the sinusoidal shape of the wave 1 MHz 2002 410 400 pers 2 s minimum 2 m maximum According to requirement in 3 9 1 1 kV 1 kV No test Series mode Wiring terminals Wiring terminals According to PFVP 6 3 2 2 There shall be no deviation Details of mounting support According to manufacturer s specifications ee CL PE TI PA RE TIE A ISAEC 1131 2 1992 Power supply Equipment under test source a E 7 i IPERE 1 i i
6. Table 5 Free fall on concrete floor Applicable to portable and hand held portable equipment Portable and hand held Hand held portable portable Any weight Any weight Withstand Immunity Random drops 1 000 mm 2 trials Fiat drops 100 mm 2 trials Supported drops 30 or 100 mm 2 trials NOTES 1 Caution Temporary malfunctioning is allowed at the impact but equipment shall be fully func tional after the test and not cause a shock hazard 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 see IEC 68 2 32 Procedure 1 3 From prescribed values given in 3 2 1 of IEC 68 2 31 20 ISNEC 1131 2 1992 2 2 Special service conditions When the service conditions are more severe than those given in 2 1 or other adverse environmental conditions exist e g air pollution by dust smoke corrosive or radioactive particies vapours or salts attack by fungi insects or small animals the manufacturer should be consulted to determine suitability of the equipment or the steps to be taken 2 3 Requirements for transport and storage of modules and subassemblies The following requirements apply to PC units placed within manufacturer s original packag ing Transport and storage of unpackaged portable equipment should not exceed the requirements of 2 1 When components are
7. the information that the manufacturer is required io supply the test methods and procedures that are to be used for the verification of compliance of programmable controllers and their associated peripherals with the requirements 1 4 Definitions NOTE Thi F EIn 3 iy ai cour w a a e order to make it more self c pitained Terms of general use are defined in part 1 4 1 accessible part 1 A part which can be touched by the standard jointed test finger see IEC 529 2 A conductive part which can readily be touched and which is not normally live but which may become live under fault conditions IEV 441 11 10 modified 1 4 2 basic PC system s Representative configuration s used for type tests See figure 1 in 3 1 and 6 3 1 1 4 3 battery An electrochemical energy source which may be rechargeable or non rechargeable 1 4 4 circuit class class ll class lll see equipment 1 4 16 m im om a am a Tha a short whi md ist mamn babe AA mmr eds am m mb a me fa mnda amm Ff 5 clearance Pie SHOT SI di vidilld peiween two conductive Pato Vi VMULWOUCI a t Sandue Va part and the bounding surface of the equipment measured through a F Z dea i EE A eee ee P ti a sal eer ge tn Pa La bounding surface is t e outer surface of the enciosure considered as pressed into contact with accessible surfaces of insulating material 1 4 6 coating protective A coating of suitable insulating material that covers the
8. 3 4 1 Analog inputs 3 4 1 1 Rated values and impedance limits Rated values of signal range and impedance for analog inputs to PC systems shali be as specified in the following table 12 Table 12 Rated values and impedance limits for analog inputs Signal range input impedance limits i0V 10V 219k OV 10 V 1V 5V m cOmA OmA 20 m i lt 30 Nh t NOTE 1 Not recommended for future designs Analog inputs may be designed to be compatible with standard thermocouples or standard resistive temperature devices RTDs such as 400 Q Pt sensors Thermocouple analog inputs shalt provide a built in cold junction compensation 37 ISAEC 1131 2 1992 3 4 1 2 3 4 1 2 1 Static characteristics Units and examples Information to be provided by the manufacturer Table 13 Analog inputs information to be provided Input impedance in signal range Analog input error Maximum error at 25 C Temperature coefficient Maximum error over full temperature range Digital resolution Data format returned to the application program Value of LSB least significant bit Maximum permanent allowed overload no damage Digital output reading under overload condition Type of input Common mode characteristic d c 50 Hz 60 Hz if applicable For other inputs thermocouples RTD etc type s of sensor s measurement range s linearization method k 3 4 1 2 2 Dynamic characte
9. 3 7 and 3 8 3 1 General A typical PC system and its interfaces are shown in figure 1 below ISAEC 1131 2 1992 Programmable Remote VO station controller neg system parmanentiy non PC system permanent installed Digital amp nos re gt A Digital amp analog outputs ies and 3rd Party devices gt computers data printers f transmission terminals Processing Unit s F Power supply Mains power supply 4 Functionnal earthing Protective earthing p nterfaced devices and signals Limit of the scope of this standard i 7 Interface for remote VO stations Interface for peripherals permanently non permanently installed Interface for digital and analog input signals Interface for digital and analog ouput signals Serial or parallel interfaces for data communication with third party devices Interface for incoming power supply Interface for protective earthing Optional interface for functionnal earthing IEC 954192 Figure 1 Typical interface diagram of a programmable controller system 23 ISAEC 1131 2 1992 3 2 A C and d c power supply 3 2 1 Incoming power supply 3 2 1 1 Rated values and operating ranges Incoming power supplies to the PC system and to the externally powered I O modules shali be as shown in table 7 below Table 7 Rated values and operating ranges of incom
10. Exceptions These tests need not be done 84 ISAEC 1131 2 1992 between isolated SELV circuits and accessible conductive parts frames enclosures earth terminal etc on units parts of the basic PC system which have been tested separately accord ing to the relevant standards provided a the values given in table 17 in 3 10 2 have been met and b their dielectric strength is not impaired by assembly between isolated circuits on printed wiring boards providing the specified clearances and creepage distances have been met See 4 3 Test conditions The tests are done on each unit and module connected in the test circuit as shown in figure 8 If required tests can be done on individual modules with the remaining modules removed All mechanical switches shall be in the ON closed position Test technique One may select any one of the following techniques Impulse test according to IEC 60 1 and the following conditions Pulse characteristics Source impedance Source energy Length of connection Number of impulses Time between two impulses a c r m s voltage test Number of periods Voltage signal Short circuit current d c voltage test Pulse duration at d c value Pulse rise fall times Number of pulses Time between pulses Short circuit current NOTES 1 2 50 ps 20 500Q2 10 0 5 J420 lt 2 m 3 positive and 3 negative 25s 23 starting from 0 V
11. IEC 60 1 1989 IS 2071 Part 1 1993 High voltage test techniques Identical Part General definitions and test requirements second revision IEC 68 2 1 1990 IEC 68 2 2 1974 IEC 68 2 3 1969 IEC 68 2 6 1982 IEC 68 2 14 1984 IEC 68 2 27 1987 IEC 68 2 30 1980 IEC 68 2 31 1969 IEC 68 2 32 1975 IS 9000 Basic environmental testing for electronic and electrical items series Technically IS 9001 Guidance for environmental testing series equivalent IS 9002 Equipment for environmental tests for electronic and electrical items series IEC 85 1984 IS 1271 1985 Thermal evaluation and classification Technically of insulation first revision equivalent HEC 112 1979 IS 2824 1975 Method of determining the compara Technicaly tive tracking index of solid insulating materials under equivalent moist conditions first revision ICAC 4494 9 100 TAFE lbn W LLU tvve International Standard Corresponding Indian Standard Degree of Equivalence IEC 529 1989 IS 4691 1985 Degrees of protection provided by Technically enclosure for rotating electrical machinery equivalent IEC 664 1980 SP 39 1987 Guide for insulation co ordination within Technically low voltage systems equivalent IEC 695 2 1 1980 iS 11000 Part 2 Sec 1 1984 Fire hazard testing Part identical 2 Test methods Section 1 Glow wire test and guidance IEC 707 1981 IS 11731 Part 1 1986 Method of test for the deter Technically
12. Operating temperature ranges are given by the following table 1 Table 1 Operating ambient air temperature of PC systems C note 1 Se ee ee Enclosed equipment Open equipment ventilated non ventilated note 2 Type of Permanent Non permanent Permanent Non permanent installation installation installation installation Temperature range Average temperature over 24 h Max 35 35 50 T note 3 NOTES ae 1 See definitions in 1 4 50 and in annex A a ee ee ee aam ida 2 Open equipment is designed to be mounted within an enclosure where the equipment ambient air temperature which is measured immediately below each i ndividual assembly may be up to 15 C above the maximum room ambient air temperature No forced external cooling is assumed see 4 5 1 Open peripherals which are intended to be permanently installed as part of the PC system shalt meet the operating temperature range of the PC 3 Equipment ambient air temperature limits Tra a T for open peripheral equipment not intended to be permanently installed shali be specified by the manufacturer 5 a 17 lL nn eae ISMEC 1131 2 1992 2 1 1 2 Storage temperature The allowable temperature range is 25 C to 70 C 2 1 1 3 Relative humidity The manufacturer may select one of the two following levels Table 2 Operating ambient air relative humidity notes 1 and 2 Relative humidity severity level Relative humidity
13. 05 m s A magnifying glass shall be used to verify that the cuts have suitably reached the basic material The handbrush shall be used to brush the grid five times forth and back in a diagonal direction under soft pressure Pass fail criteria Total chipped area shall be smaller than 5 of the grid area No separation fracturing or delamination of the coating from the surface of the base material or conductor is allowed 3 6 3 5 6 Verification of terminal connection characteristics Verify that requirements of 4 6 are met 6 3 5 7 Plugging unplugging of removable units Table 42 Insertions withdrawals of removable units Subelause 3 8 1 tam 1 0f 28 1 49 and 4 10 Description of the test for 0 20 insertions withdrawals are performed without power permanently installed units __ then the equipment shall pass the PFVP 6 3 2 2 Description of the test for 500 insertions withdrawals are performed while non permanently installed units the basic PC system is performing functional test programs as required for PF VP 6 3 2 2 Insertions and withdrawals shaii not affect the proper operation of the basic PC system Communication on the physical link during the test is not required 6 3 6 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 PC system being tested 6 3 6 1 Safety related tests 6 3 6 1 1 Dielectric test
14. 1 General tens oe Ba n ee hn een te se Oe ee eae 67 5 2 Index of information to be provided 20 00 ccc ee ee 67 5 3 Type and contents of written documentation 0 0 0 0 0 0 eee ee eee 69 5 3 1 Catalogues and datasheets ee E oe es Sees EE EE EE 69 532 SEF SMANUAIS esie ds whe tone REL oe Pe Rea coe Fa RN Saeed a 69 5 3 3 Technicaldocumentation 0 0 0 eee 69 5 4 Information on compliance with this Standard 4c s coos ER seen 69 5 5 information ON TElADINY srs eat ae Meet odie iad Ch RR a de ae ae ied a 69 5 6 information On salet oneei Gis o nia ae te Pike Ea eet es esi Re dee i 70 6 Tests and venficatlions 244 ca4n4 ba bbh nether Bowes dhe he awe ee ke SU BR enss 70 6 1 CONC EEE au are ecg Poaceae ae eee aie Se ee eh ee 70 6 2 Compliance with this standard 0 0 0 0 000 ce eee 70 6 3 Type tests ice vkteads ote tow MLR ES ie Sig eae eee Pdi Bee 71 6 3 1 Equipmentto be tested s cineres eaa dade Bee eae Ses ees 71 6 3 2 Verification procedure 22 5 tid cnn ie a Cae baw ds Paes 72 6 3 3 General conditions for tests 0 0 0 0 0 2 0c eee 73 634 CUMALCICSIS 6 i004 04 250d hoe cele es Oe bee hid Chee oa eee ens 74 635 IWWechanical tests sirere oa dee eStats Bee ee Chek ee ee 77 6 36 ElISCiNiCaliestS icc cand5 coh jak oredae as bao btaeeaeees Hey oe eae 84 6 3 7 Verification of a c and d c power supply characteristics 91 6 3 8 Verification of inpu
15. 105 Protective earthing continuity test withstand test 4 2 The resistance shall not exceed 0 1 Q metal parts intended to be earthed The application points are between the earthing terminal or contact and the accessible intended to be earthed The test shall be performed on all non SELV rated voltage units 6 oO Oo ISNEC 1131 2 1992 Annex A normative lillustration of PC system hardware definitions The following figure A 1 illustrates the hardware in the PC system as defined for the purposes of parts 1 and 2 of IEC 1131 MAIN REMOTE PERMANENT NON PERMANENT PERIPHERALS PROCESSING INPUT OUTPUT PERIPHERALS UNIT STATIONS NOT PLUGGABLE PLUGGABLE ON LINE ON LINE NON TRANSPORTABLE lt w y u u U u M o o M i a a u e u M eee a we Fe ae e e ete ee ee aw ae e y a y u o o a ee _ e m a u M M l O UM M M _ aw e vr e ve Ae me am pafe Shy e PORTABLE HAND HELD PORTABLE PROGRAMMABLE CONTROLLER PERIPHERALS PERMANENT INSTALLATION NON PERMANENT INSTALLATION PROGRAMMABLE CONTROLLER SYSTEM PC SYSTEM IEC 865192 Figure A 1 Programmable control system PC system Transportable portable and hand held portable peripherals have specific requirements and have to be distinguished from permanently installed peripherals see 2 1 3 3 3 9 2 and 4 5 3 107 ISAEC 1131 2 1992 Annex B normative Input table equations The following equations were us
16. 2 Remote input output stations 3 8 2 Peripherals Note 1 of 3 9 1 Noise immunity 3 9 2 Noise immunity 3 10 3 insulation properties 3 11 3 Self tests and diagnostics Item 2 of 4 2 Warning labels open equipment Note 6 of table 26 4 4 2 Terminal connections 4 5 1 Enclosures power dissipation 4 5 2 Enclosures moving parts 4 6 3 Terminal connections 4 12 Markings 5 4 i Compliance with this standard 5 5 Reliability 5 6 Safety Item 7 of 6 3 2 2 Coverage factors 3 Under consideration 4 Under consideration 5 Under consideration AA OG ISAEC 1131 2 1992 5 3 Type and contents of written documentation Three levels of documentation are defined catalogues and datasheets user s manuals technical documentation 5 3 1 Catalogues and datasheets These documents shail contain the description and the specifications of the PC system and its associated peripherals and 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 compliances with standards and certifications Moreover these documents shall ea specify the limits of the contract and of the guarentee of the manufacturer 5 3 2 User s manuals These documents shall include the necessary information for the prop
17. 47 safety extra low voltage SELV A voltage which under all operating conditions does not exceed 42 4 V peak or d c between conductors or between any conductor and earth in a circuit which is isolated trom the mains power supply by means of a safety isolating transformer or an equivalent means National regulations have to be considered for a correct isolation voltage rating 1 4 48 safety extra low voltage circuit SELV circuit Circuit which is so designed and protected that under normal and single fault conditions the voltage between any two accessible parts one of which may be earth or a conductive accessible part connected to earth does not exceed the safety extra low voltage and in which overvettages higher than SELV are not generated 1 4 49 Subassembly Synonymous with unit 1 4 53 13 ISIEC 1131 2 1992 1 4 50 temperature ambient alr 1 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 plane located at the vertical mid point of the enclosure 2 For enclosed ventilated equipment the equipment ambient temperature is the temperature of the incoming air 3 For open equipment the ambient air temperature is the temperature of the incoming air immediately below the equipment 1 4 51 total output current of an output module The current that a multi channel module o
18. V d c note 3 V For basic and For reinforced impulse D C supplementary insulation peak 1 2 50 us note 6 insulations note 4 note 5 Pass fail criteria There shall be no unintentional flashover or breakdown of the insulation during the test Eventual operation of the protecting devices provided on the units shall not be considered as a failure NOTES 1 When the assembly includes an equipotential conductor isolated from the accessible exposed conductive parts it shall be regarded as an isolated circuit and shall be tested to the same voltage as the assembly to which it belongs 2 See annex D correction factor for testing at other altitudes These test values are 1 27 times smaller than applicable type test values 3 Rated voltage at the field wiring terminals of the device or circuit Class I and applicable class Ill circuits 4 1 2 ps rise time 50 ps wide at 1 2 amplitude 0 6 J maximum energy 6 Pulsed d c pulsed width 10 ms rise and fall times not less than 1 2 ps 104 ISAEC 1131 2 1992 6 4 1 2 Alternative dielectric strength test withstand test for class equipment only The manufacturer may elect to use the following test which is more stringent than the standard test required in 6 4 1 1 for all rated voltages U smaller than 150 V However it must be noticed that the minimum values of clearance and creepage distances which are required in 4 3 may n
19. ZAFAR MARG a NEW perni tigoaz ISAEC 1131 2 1992 CONTENTS GONGlal sg ces tne a2 he ew a a a i Mee a ee te ee ek 7 1 1 SOPE 246 6431 fo A e A a a A E A ees EAEE E a E 7 1 2 Obi ctof the standardiero stiera da Khalsa a a e MERA ees 7 1 3 ODj ctof hispan esascs roneer EEn ee Ge RA ie a ea eee Re e a 8 1 4 DSNNINONS 23 oA nec eee c eee es ee oe ee ee a oe ee Ue ee 8 1 5 Normative references 0 00005 Ge te EASE ee ee Wermnies 15 Service conditions and physical environment related requirements 17 2 1 Normal service conditions 0 00 00 cee eee 17 2 1 1 Physical environmental conditions 0 0 0 0 2022000002 eee 17 2 1 2 Electrical service conditions and requirements 000 18 2 1 3 Mechanical service conditions and requirements 19 2 2 Special service conditions 0 0 0 0 anaua naea 21 2 3 Requirements for transport and storage of modules and subassemblies 21 25 TOMPENG eene cat ied eb de eee eee eee Sh bk at 21 2 3 2 Relative humidity 0 0 0 0 0 ccc eee eee tenes 21 2 3 3 Atmospheric pressure 00 0 0c eens 21 2 3 4 Freefalls ee E ee ee ee ee eee 21 230 OUIEFCONGIIONS ind coe hess ors E ham dole buen ows Raw dwg RAS N 22 2 3 6 Information to be provided by the manufacturer 22 2 4 Transport and storage conditions of PC systems incorporated in complete COMMOrASSEMDIICS a
20. any for PC systems energized through multiple power supplies or supply voitages and frequencies not included in 3 2 1 1 5 the effect of the following incorrect connections of power to the supply ies reverse polarity improper voltage level and or frequency improper lead connection 6 complete information on PC system behaviour for typical power up down sequences 7 data to allow evaluation of the maximum values of interruption time which do not affect the normal operation ofany PC system configuration PS class PS 1 or PS 2 of d c supplied devices 8 memory back up time with respect to temperature and maintenance requirements 9 recommended time interval between replacement of energy sources if applicable and recommended procedure and subsequent effects on the PC system 26 ISAEC 1131 2 1992 _ 3 3 Digital I Os The following figure 2 gives an illustration of definitions of some I O parameters Current sinking Current sourcing PC INPUT ee ee ee 7 PC OUTPUT COMMON REFERENCE _ C Output IEC 955192 Mechanical or static contact e g dry relay contact triac transistor or equivalent E Earthings The earth shown are optional Earthings is dependent on national regulations and or application needs Z input Input impedance PS External power supplies NOTE Some applications may use only one PS common to inputs outputs and PC system Figure 2 I
21. applicable Terminals shall be suitable for the wire size s number of wires and type of wire copper aiuminium etc required for the intended application See IEC 1131 4 for more information 4 6 2 2 Minimum requirements for field wiring terminals The fotiowing tabie 27 specifies the minimum range of wire sizes which shall be properly accepted by the terminal with respect to the type of interfaces NOTE Stranded wires may be used if they are suitably terminated 61 ISHEC 1131 2 1992 Table 27 Minimum range of wires sizes for field wiring terminals Minimum range of wire sizes mm Digital inputs 5 AWG20 AWG 16 Digital outputs 5 AWG20 AWG 14 Type of interface Analog I Os AWG24 l AWG16 Communication AWG24 AWG16 Mains power supply note AWG16 AWG 12 Protective earth note AWG16 AWG12 NOTE The minimum size of the conductor tor the connection to the mains power supply and protective earth is generally specified in the national wiring rules 4 6 3 Information to be provided by the manufacturer in addition to the requirements of clause 5 the manufacturer shall provide the following information through convenient documentation and or marking 1 type cross sectional area and material of the conductors that may be connected to the PC system 2 recommendations for use of shielded cables and how they are to be connected and earthed 4 7 Provisions for protective eart
22. be deflected shall not be less than 12 mm 3 The above clearances do not apply to printed wiring boards with suitable protective coating 4 The above clearances do not apply to areas where impulse voltages do not occur 4 3 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 19 51 ISNEC 1131 2 1992 Table 19 Minimum clearances in air at field wiring terminals Termination clearances mm Rated voltage of circuit Uo V a c r m s or V d c To walls of General case metailic enclosures _ which may be deflected O lt Ua lt 50 50 lt Uo lt 300 300 lt U lt 600 4 3 2 Clearances for micro environment where the voltages are known and controlled In the case where the equipment is not connected directly to the mains and the peak voltages are known and controlled the minimum clearances corresponding to these peak voltages are given in table 20 Table 20 Minimum clearances in air for micro environment where the voltages are known and controlled Definitions and entries in this table are derived from IEC 664 Peak voltage including all Minimum clearances transients and impulses V mm Up to 2 000 m altitude Pollution degree note 2 NOTE See annex D correction factor for testing at other altitudes 1 Clearances shall be verified by mechanical measurement
23. clear ance and or creepage distance of the printed 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 The tests are type tests or production routine tests and not tests related to the ways programmable controller systems are applied ISHEC 1131 2 1992 NOTE Coating is normally applied to exclude the effects of atmosphere and to increase the dielectric properties of the clearance and or creepage distances which would not normally be adequate without coating Less effective coating may exclude the atmosphere but cannot be relied on to enhance the dielectric properties 1 4 7 comparative tracking index CTi The numerical value of the maximum voltage at which a material withstands 50 drops of NH CI solution ammonia chloride without tracking see IEC 112 1 4 8 coverage factor for modules units external wiring internal wiring removable cables interconnections and functions The percentage of modules units external wirings internal wirings removable cables interconnections functions whose removal absence or failure is detected by built in test functions or by a suitable test program along with a proper functioning verification procedure See 6 3 2 1 4 9 creepage distance The shortest path between two conductive parts or between a conductive part and bounding conducting surfa
24. included in the equipment which have particular limitations e g CMOS components batteries etc the manufacturer shall pepecny the arrangements to be made for transport and storage 2 3 1 Temperature The allowable temperature range is 25 C to 70 C See test procedure in 6 3 4 2 2 3 2 Relative humidity The relative humidity range is 5 to 95 non condensing 2 3 3 Atmospheric pressure The minimum atmospheric pressure for transportation shall be not less than 70 kPa equivalent to 3 000 m altitude 2 3 4 Free falls Withstand requirements for PC units within manufacturer s original packaging are given in table 6 below After the test they shall be fully functional and shall show no evidence of physical damage See test procedure in 6 3 5 4 Tabie 6 Free fall on concrete floor Applicable to PC units under manufacturer s original packaging Shipping weight Random free fall without packaging drop ie Number of falls kg lt 1 000 10 to 40 gt 40 NOTE According to IEC 68 2 32 procedure 1 Zl ISMEC 1131 2 1992 2 3 5 Other conditions 2 4 Transport and storage conditions of PC systems incorporated in complete control assemblies _ These conditions are not part of this standard and therefore the manufacturer should be consulted 3 Electrical requirements NOTE Functional requirements for PC systems including those relating to basic and advanced functions of PADTs are given in 3 6
25. limits note Tr Type 2 limits oe 7 Transition State 0 Transition states 1 Notes ae IH t IL uT IT a lH mA mA mA mA voitage Ug 100 V a c 110 V a c 120 V a c 200 V a c 230 V a c 240 V a c NOTES 1 All logic signals are in positive logic Open inputs shall be interpreted as state O signal Compatibility with 2 wire proximity switches according to IEC 947 5 2 is possible with type 2 see also note 3 See annex B for equations and assumptions used in developing values in this table and for additional comments 2 The given voltage limits include ali alternating voltage components 3 Static switches may affect the total r m s content of true harmonics of the input signals and therefore affect the compatibility of the input interface with proximity switches especially for type 2 24 V a c See 3 2 1 1 for requirements 4 Recommended for common usage and future designs The minimum external power supply voltage for type 2 24 V d c inputs connected to two wire proximity switches should be higher than 20 V d c or UH min lower than 11 V to allow sufficient safety margin 6 As allowed by the current technology and to encourage the design of single input modules compatible with all commonly used rated voltages limits are absolute and independent of rated voltage except UH max and based on equations given in annex B and respectively 100 V a c and 200 V a c 7 See definit
26. manufacturer shall provide the following information through convenient documentation and marking 1 rated isolation voltage and class of each PC system subassembly 2 maximum permanent current withstandable by the incorporated protective conductors and connections see item 6 of 4 7 2 47 ISIEC 1131 2 1992 3 11 Self tests and diagnostics 3 11 1 General The manufacturer shall provide means of self tests and diagnostics of the PC system operation Such means shall be built in services of the PC system and or recommended ways to implement the intended application 3 11 2 Requirements 1 The following means shall be provided a a means for monitoring the user s application program i e watchdog timer etc b a hardware or software means to check the memory integrity c a means to check the validity of the data exchanged between memory ies processing unit s and 1 O modules d a means to check that internal voltages and currents delivered by the power supply unit s do not exceed the limits allowed by the hardware design e a means to monitor the status of MPU 2 The permanently installed PC 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 an
27. mination of the flammability of solid electrical insulating equivalent materials Part 1 Horizontal specimen method IS 11731 Part 2 1986 Method of test for the determination of the flammability of solid electrical insulating materials Part 2 Vertical specimen method IEC 947 1 1988 IS 13947 Part 1 1993 Low voltage switchgear and Identical controlgear Part 1 General rules IEC 947 5 1 1990 IS 13947 Part 5 Sec 1 1993 Low voltage Identical switchgear and controlgear Part 5 Control circuit devices and switching elements Section 1 Electro mechanical control circuit devices IEC 950 1991 IS 10422 1982 Requirement and test methods for Technically safety of data processing equipment equivalent The concerned technical committee has reviewed the provisions of following IEC ISO standards referred to in this adopted standard and has decided that it is acceptable for use in conjunction with this standard IEC 255 4 1976 Electrical relays Part 4 Single input energizing quantity measuring relays with dependent specified time IEC 364 4 443 1990 Electrical installations of buildings Part 4 Protection for safety Chapter 44 Protection against overvoltages Section 443 Protection against overvoltages of atmospheric origin or due to switching IEC 417 1973 Graphical symbols for use on equipment index survey and compilation of the single sheets IEC 445 1 988 Identification of equipment terminals of certain d
28. not covered by this standard shall be agreed by the manufacturer and the user In addition routine tests are specified in 6 4 6 2 Compliance with this standard 1 Compliance with parts 1 and 2 of this standard cannot be claimed unless all tests and verifications required in this part are complied with 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 2 Compliance with constructional requirements and information to be provided by the manufacturer shail be verified by suitable examination visual inspection and or measurement On the other hand user s obligations are considered in several subclauses of this part 1 1 2 3 2 item 2 of 4 2 5 6 etc and in IEC 1131 4 70 ISIEC 1131 2 1992 3 All characteristics not tested according to this clause 6 shall be verifiable under a procedure to be agreed to by the manufacturer and the user 4 The manufacturer shall be able to give enough information on all requirements on this part when claiming compliance for his implementation 5 It is the manufacturer s responsibility to ensure that delivered programmable control lers equipment and associated peripherals are similar to the sample s which have been type tested according to this standard and therefore that they comply with all requirements of this standard 6 Significant modifications shali ve indic
29. on basic insulation only but which includes an additional safety precaution in that accessible conductive parts are connected to the protective ISHEC 1131 2 1992 earthing conductor in the fixed wiring of the installation in such a way that they cannot become live in the event of a failure of the basic insulation For equipment intended for use with a flexible cord this provision includes the protective earthing conductor as part of the flexible cord NOTE Class equipment may have parts with double insetation or reinforced insulation or parts operat ing at safety extra low voltage 2 Class Il circuit or equipment Circuit or equipment in which protection against electric shock does not rely on basic insulation but in which additional safety pre cautions 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 i insulation encased class Il equipment equipment having a durable and substantially continuous enclosure of insulating material which envelops all con ductive parts with the exception of small parts such as nameplates screws and rivets which are isolated from parts at hazardous voltage by insulation at least equivalent to reinforced insulation ii metal encased class Il equipment equipment having a substantially continuous metal enclosure in which double insulatio
30. outputs Yes Yes Yas Yes Yes e short circuit proof outputs No No Yes No Yes note 2 note 4 e not protected outputs note 3 No No Yes No Yes note 2 note 4 Measurement and verification See requirements in 3 3 2 2 and 3 3 3 2 e during the overload No evidence of risk of fire or electrical shock e immediately after overload Maximum temperature rise of the O insulation shall not exceed the value of 4 4 2 e after overload and proper resetting According to PFVP 6 3 2 2 NOTES 1 1 2 for a c outputs 1 3 for d c outputs 2 For currents in the range of two times to 20 times the module may require repair or replace ment 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 5 An alternative method for testing of protected outputs is under consideration See annex E 100 6 3 8 3 3 Reversal of signal polarity test withstand test Requirement reference item 13 of 3 3 2 3 ae oe pak tae a wari a gm B if the equipment is designed to prevent reversai 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 6 3 2 2 Protec
31. rt nit eat dat aiit a ei i H l 5 J te i ld aa i Wl ide oul Wy a a nk elii Li My H Pi ji ir EEE tes tee Alice es Ee teenth Sah I jip His a a iain dinila ala hee he a ee A i oe rap a ay luin j 2 al in Ti 7 L ri r pes 1 i Cal ut Th i KI i Ti i i bA y Wii JE beat E T irk as tio eee oe iw i Eil H f l A si M i ae pi i Wali i PTH fal Te beat PRE MER ete oh ual iy See ue ahd Ma el if sod SS j T k i EE L an if T j it i Lone Tt t ee eee ee l l ie j eal art ee i pane AE TT mie beter a Vl J ah at i p rii TOLT EETU in Ni ie HISH lp aay on oh a Leek Soe Ves E a lenient pyre Sent eee IES iaia og j P i pjana haj LIP os I il so b a thet aera LET hada f s l f i Oe ones semea est i ESj i EL pee Od ee i ni Bite a im ee os a h Ahi iig a3 a al it St el ie aj em i Se e fo ety gt if ber aa T EN i PaA pa pame Hts Hip _ m it r fierce K yai j abe z i i 1E rae jpe ies SEERA Oe aan AU I ales DE TTET ATE acii tij Tr E EN Le ee es i PUP a Bisa SiS l i zii Wii Stati H TF 3 z al H ii a e 2 roe ile Hil P rer EREE E 5 i A Hee pi ESENIN Betts al is at hb L Hl hte there Frit apii pi x ees s h 1 We N i z gt a x r et Oe j reps g rT z os i TH f r MIT l T i let HE BAJE
32. table 24 in 4 3 3 2 2 will prevent any partial discharge from occurring and are vaiid for pollution degrees 1 to 3 4 3 3 2 2 Creepage distance requirements for recurring peak voltages Im AAA IAN te than AlLAAPrANnAAR nna AFAARARA AlBAtANnAA FAMIIIFAmAnta Af tha nranndinn alaneaan UI AMUMIVEIE tU UIG VITAGIGIIVe GU VICUVays UGS FOUN UCIT VI Ui PIUVUUIlly Viaquotoa when recurring peak voltages are present the creepage distance requirements given in table 24 below shall also be met Table 24 Minimum creepage distances related to recurring peak voltages on uncoated printed wiring boards pollution degrees 1 to 3 note 1 Maximum recurring Maximum recurring peak voltage eisepage distance peak voltage Creepage distance note 2 mm note 2 mm 1140 15 1 150 16 330 0 1 1 250 1 8 400 0 2 1 650 3 0 450 0 25 1 700 3 2 600 0 4 2 200 5 0 640 0 5 2 300 55 800 0 75 2 800 8 0 NOTES 1 This table does not apply to peak values of 50 Hz 60 Hz wave of the mains power supply see 3 2 1 3 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 4 3 3 2 3 Example opa gt my The following figure 5 shows which requirements apply to each part of a typical design of a P gI D IS EC 1131 2 1992 SWITCH MODE L
33. tests are required if the manufacturer provides evidence that the material complies with IEC 707 or alternatively the IEC 695 2 1 glow wire test under the conditions given in table 25 below Table 25 Fiammability of non metallic materials Glow wire test see IEC 695 2 1 Length of Extinguishing application Test temperature C Ce OOO Exceptions 1 Printed wiring boards printed wiring board materials may have a flame rating of FV2 provided there is no combustible materiai less than 300 mm below the plane of the board If the board is not manufactured with accompanying housing or enclosure the board shali be rated FV1 or FVO as above 2 Decorative material cosmetic plastics non metallic materials used solely for deco rative purposes i e not for support of live parts or enclosure protection require no special tlame retardant additive 4 4 2 Temperature limits of materials The temperature rise limits as specified in the tollowing table 26 shall not be exceeded by the equipment or parts defined in its complete system when tested at tull load and under normal service conditions 58 ISNEC 1131 2 1992 Table 26 Temperature rise limits notes 1 3 4 and 5 Maximum temperature rise lt Device Open equipment Enclosed equipment note 2 note 2 Hand held accessible devices Metallic 5 15 Non metallic 10 25 Parts intended to be touched
34. this table are from IEC 664 Creepage distances note 4 mm Pollution degree 2 Pollution degree 3 Material group ti ilta tb Working voitage Pollution degree 1 V a c r m s or V d c note 2 note 3 Material group i 1 Hla tib 1 9 2 2 2 5 5 0 10 0 16 0 note 5 Basic and supplementary insulation 2 2 3 2 5 0 10 0 20 0 32 0 note 5 Reintorced insulation NOTES 1 Creepage distances given in this table are for a c r m s of d c voltages which contain no impulses For micro environment where impulse voltages wili be present other additional requirements apply for overvoltage category li the creepage distances shall be not less than the appropriate clearance distances values see 4 3 1 creepage and clearance distances of high frequency voltages generated in switch mode power supplies shall be evaluated using table 24 in 4 3 3 2 2 Vae r m s of sinusoidal or non sinusoidal wave 3 For all material groups 4 Greepage and clearance distances between circuits shall be that corresponding to the highest working voltage and the corresponding dielectric withstand voltage 5 Only for material group lla Material group lilb is in general not recommended for application in pollution degree 3 above 630 V 6 Maximum recurring peak voltages in normal operaiion shail be limited
35. to the values in 4 3 3 2 to prevent degradation of insulation by partial discharges 54 ISIEC 1131 2 1992 4 3 3 1 2 Minimum creepage distances for printed wiring boards _Creepage distances associated with basic and supplementary insulation for protective coated and uncoated areas of printed wiring boards shall be not less than given in the table 23 below nor be less than the values of the appropriate clearances Table 23 Minimum creepage distances for printed wiring boards notes 1 6 and 9 Basic and supplementary insulation Definitions and entries in this table are from IEC 664 Areas of PWBs with protective coating mm notes 3 4 5 and 6 Uncoated areas of PWBs mm Circuit voitage Vac r m s or V dic Pollution degree 1 note 7 Pollution degree 2 note 8 note 2 NOTES 1 Creepage distances given in this table are for a c m s or d c voltages which contain no impulses For micro environment where impulse voltages will be present other additional require ments apply for installation category n the creepage distances shall be not less than the appropriate clearance distances values see 4 3 1 creepage and clearance distances of high frequency voltages generated in switch mode power supplies shall be evaluated using table 24 in 4 3 3 2 2 2 Va c r m s of sinusoidal or non sinusoidal wave 3 Protective coating shall adher
36. utilization category durability class 0 3 according to IEC 947 5 1 NOTE The type test is not required if the relay components have been shown to comply with the require ments of IEC 947 5 1 3 3 2 3 Information to be provided by the manufacturer In addition to the requirements of clause 5 the manufacturer shall provide the following information with respect to digital outputs for a c operation 34 ISAEC 1131 2 1992 1 type of protection i e protected short circuit proof not 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 invoived for short circuit proof outputs information for replacement or resetting the pro tective device as required for not protected outputs specification for protective device to be provided by the user as required 2 output delay time TQD and output transfer times TQT for state 0 to state 1 and State 1 to state 0 transitions 3 commutation characteristics and turn on voltage with respect to zero voltage crossing 4 existence of common points between channels 5 terminal arrangements 6 typical example s of external connections 7 number and type of outputs e g NO NC contacts solid state individually isolated channels etc 8 for electromechanical relays the rated current and voltage of the cont
37. zero crossing lt 5 mA 10 ms t 20 gt 1 2 us 1 positive and 1 negative lt 5s lt 5 mA 1 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 2 See annex D correction factors for test voltages corresponding to barometric pressure or altitude 3 To recognize current practice the manufacturer may elect alternatively to verify the dielectric strength by the application of 2 Uo 1000 V a c for a minimum duration of 1 min 85 ISAEC 1131 2 1992 isolated o circuit o p isolated o circuit o Isolated circuit oj Under test 3 SELV circuit o SELV circuit under test o AMP Accessible Metal Parts Method a Method b Method c Test between each Test between each Test between each isolated CIRCUIT sequentially ACCESSIBLE SELV CIRCUIT and and the others together CONDUCTIVE PARTS and non SELV CIRCUITS each non SELV CIRCUIT separately IEC 961192 Figure 8 Dielectric test procedures Test method The test voitage shall be applied as follows a Between isolated circuits other than SELV circuits The test voitage shati be applied between each isolated circuit and the remaining Circuits connected together to the earth The test voltage shall be that given in table 17 in 3 10 2 corresponding to the highest rated voltage and class of the circuits b Between isolated circuits other than SELV circuits
38. 1 2 According to manufacturer s specifications According to PFVP 6 3 2 2 Preconditioning Initial measurements Details of mounting support According to manufacturer s specifications All exposed conductive parts and insulating surfaces of the basic PC system normally accessible to the operator see 3 9 1 Selection of application points Signal lines circuits or live parts becoming accessible only during maintenance operations e Exception Discharge characteristics e test peak voltage RH 1 ESD 3 RH 2 ESD 4 Time between two discharges 8 kV 15 kV gt 1s 10 discharges after the equipment is discharged to earth According to PFVP 6 3 2 2 Number of discharges on each selected point Measurement and verification during loading There shall be no deviation other than allowances for analog and fast responding I Os If the system deviates only once during the test a second trial of 10 discharges shall be performed if only one more unallowed deviation is observed failure to the ESD test shall be declared Pass fail criteria 6 3 6 2 2 Radiated electromagnetic field test Table 44 Radiated electromagnetic field immunity test Reference test i IEC 801 3 Requirement reference Subclause 3 9 1 Preconditioning According to manufacturer s specifications Initial measurements According to PFVP 6 3 2 2 Details of
39. 10 n 60 i 60 SDV i According to manufacturer s Specification or 10 s t 20 PC SYSTEM starts shut down procedure i P i t 1 or initiates abnormal SS siesta ee procedure Test B Fast supply Test C Slow supply voltage variations voltage variations Oe alo m IEC 904 Figure 11 External energy supply variation tests The rated voitage of reverse polarity shall be applied for 10 s The results shail comply with the conditions stated by the manufacturer such as fuse blowing After the test the basic PC system shall pass the proper verification procedure see 6 3 2 2 Protective devices such as fuses may be reset prior to verification 6 3 7 4 2 Improper voltage level and or frequency test For voltage level above the maximum normal service conditions limit U max or and frequencies beyond the normal service conditions limits Fi max and F min the test shall wre w SE w be agreed between the user and the manufacturer 96 ISNEC 1131 2 1992 6 3 7 5 Verification of memory back up characteristics 6 3 7 5 1 Back up duration withstand test Table 52 Back up duration withstand test Reference test Requirements references Subclause 3 2 1 2 items 6 and 7 of 3 2 3 item 17 of 3 3 2 3 Preconditioning According to PFVP 6 3 2 2 Duration of preparation According to manufacturer s specifications energy source may require time to be fully charged Test to be perfor
40. 6 1 1 and the fol lowing 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 conducted foil The applicable test voltage as given in table 17 in 3 10 2 is then applied between each conductor in turn and the common connection of all other conductors and this conducting foil Mechanical properties of terminals NOTE The applicability of the requirements of IEC 947 1 to this subclause is under consideration 81 ISAEC 1131 2 1992 Verification of the protection against the effect of improper connections Requirement references Item 2 of 3 8 1 4 9 item 2 of 4 12 2 1 4 12 2 3 to 4 12 2 6 Verifications Connectors shall have either mechanical key or proper warning to prevent improper connections User s manuals shall indicate correct connections to be made and include appropriate warnings as applicable Routing of wirings Requirement reference subclause 4 9 4 6 3 5 5 5 Flammability of insulating materials Requirement reference subclause 4 4 Applicable tests shall be performed for each material for which the manufacturer does not provide an acceptable compliance certificate 6 3 5 5 6 Temperature rise test Table 41 Temperature rise test According to manufacturer s specifications According to PFVP 6 3 2 2 According to manufacturer s specifications
41. INE INPUT power supply DC OUTPUT 120 230 Va c r m s SELV 50 60 Hz RECURRING VOLTAGE 450 V 1 6 kV i 1 i t 4 L Zone 3 pe aaa N a t i I t i i i 4 i t t F t i i zone 2 1 6 kV Recurring peak voltage 500 V Working voltage 0 t 500 V Working voltage 1 6 kV Recurring peak voltage IEC 988192 Zone 1 Creepage distance 2 2 0 mm controlled by minimum clearance for overvoltage category ll as given in table 18 in 4 3 1 1 Zone 2 Creepage distance 2 3 0 mm pollution degree 1 assumed controlled by recurring peak voltage as given in table 24 in 4 3 3 2 2 Creepage distance 2 3 2 mm pollution degree 2 assumed controlled by creepage distances for PWBs as given in table 23 in 4 3 3 1 2 Zone 3 No requirements for SELV Figure 5 Creepage distances of circuits where recurring peak voltages are generated 57 ISNEC 1131 2 1992 4 3 4 Creepage distances for reinforced insulation Creepage distances shall be double the value for basic insulation 4 4 Flammability requirements for insulating materials 4 4 1 Non metallic materials All non metallic materials employed in the PC system i e printed wiring boards plastic enclosures wire insulation etc with exceptions as noted below shall have suitable flame retardant properties to prevent or minimize the spread of flame and comply with a vertical flame spread rating of FV1 or FVO as given in clause 9 of IEC 707 No
42. MPU system shall provide the user s application program with relevant infor mation on current status of RIOSs 3 7 2 Information to be provided by the manufacturer In addition to the requirements of clause 5 the manufacturer shall provide the following information 1 specifications for the selection of adequate cables and other devices needed for the communication link 2 specifications for proper installation of the whole system including proper selection of energy source s 3 type of 1 O communication network point to point star multidrop ring etc 42 ISHEC 1131 2 1992 4 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 5 effect on transfer time s introduced to provide remote input information and RIOSs status to the user s application program and to transmit its logical decisions to remote outputs 6 specified values and delays according to 3 7 1 7 configuration related data maximum number of RIOSs in one single PC system configuration min max size of each 8 which I O modules of the total I O system may not be used in RIOSs and or which of their functions are altered if any 9 type architecture and characteristics of redundancy if provided 10 modems repeaters if applicable Maximum dist
43. Metallic 15 30 in normal operation Non metallic 25 40 Parts not intended to be touched Metallic 25 40 in norma operation l note 7 note 7 Non metalllic 35 50 Terminals Bare copper 45 60 note 6 Bare brass tin 50 65 Plated copper and brass Silver or nickel plated 5 70 Copper or brass NOTES 1 Temperature rise limits are based on an ambient temperature given in 2 1 1 1 2 Open equipment and enclosed equipment are defined in 1 4 3 All other materials employed within the PC system not covered in the table shall be in com pliance with the relevant requirements for that particular component as based on a 55 C ambient for open equipment and 40 C for enclosed equipment 4 The maximum temperature for several classes of insulation is given in IEC 85 6 Enclosed units shall be tested with the maximum components mounted and energized 6 The terminals shall be wired with conductors of the minimum size stated by the manufacturer If the manufacturer does not state wire sizes the minimum size in table 27 in 4 6 2 2 shall be used 7 Temperature rise limits may be exceeded if proper warning signs are provided ESEE eee eee On EEES 4 5 Enclosures 4 5 1 Evaluation of enclosures for open equipment power dissipation The manufacturer s documents shall provide information to allow the evaluation of the power dissipation of every PC configuration sub assembly and module and provide information regarding m
44. N uen ial Papl E enn iter ieee fae ibis Hina She ne de otk Pie imisa n brii kak EL So bahar fei T Pest iret A L i malt al reer ij Frisi tatty pi Ped 7 at a saHifa MES HEE pire sift Hi tu if AL RE fi M i bi ald Hatt te i Meh He irr Tiria hy 822 Sib ats E i a ai Es ity Rice LR a re St terete ot ire iiti a Hiatt eri stat ae ree A ihi erri TREH ie EpL n oe ie tits beg feb es oe be ge Loree be Peles TUEN igh beatae ea ag gi iisem i Hipage i hse gl Pee BT Baiabe varbi MAL ia atest SUS se iN JAT eee hes i iiai liri pi ain ae Til IE irae niie wih E LEN dda dh salia Ue eet La bee T biis Hie i LET antn RETTA MENETI whoa EINE pe i a i i i S TH 2 mg eee F i Aa hee fi EANN Miimii etre rHS de a Hi Hiii Erm t 7 r 4 u Cd Baek ta PILAH Enli pat ape ae Hi a palile a qem 57 be h sep in EN j ip a EN Lini aris aE p paee ei T y ey pa Gi z i i ae 1E n 1 F ie ae ap tee be T ae freee tt bo iig Liig p hen LC 4 J 5 a b Fee ee itr T MER rl i k i my i pigs E l 4 j SA ii e te Tt et ese T Neate oe HEATA iian a be i ay pog tog
45. O parameters Digital 1 Os shall comply with the following requirements 1 the PC shall be provided with at least one type of input interface and one type of output interface among those defined respectively in 3 3 1 3 3 2 and 3 3 3 2 digital inputs shall comply with the requirements of the standard voltage ratings given in 3 3 1 Non standard voltage digital inputs should be in accordance with the design equation given in annex B 3 digital outputs shall comply with the requirements of the standard ratings given in 3 3 2 1 for a c or 3 3 3 1 for d c 4 it shall be possible to interconnect inputs and outputs by means of a correct selection of the above digital I Os resulting in proper PC system operation Additional external load shall be specified by the manufacturer if necessary 5 it shall be possible to feed muiti circuit 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 oT ISAEC 1131 2 1992 6 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 NOTES 1 Current sourcing inputs and current sinking outputs which may be required for certain applications are not covered
46. acts for utilization category AC 15 and durability class according to IEC 947 5 1 and their mechanical life 9 output ratings for the other utilization categories AC 12 AC 13 AC 14 or other loads such as incandescent lamps 10 total output current for multichannel modules see definition in 1 4 11 characteristics of suppressor networks incorporated into the output circuit against voltage peaks due to inductive kickback 12 type of external protective networks if required 13 effects of incorrect output terminal connection 14 insulation potentials under normal service conditions between circuits and bus and between circuits 15 monitoring points of visual indicators in the channel e g MPU side load side 16 recommended procedures for changing output modules 17 output behaviour during interruptions of MPU control voltage drops and inter ruptions and power up down sequences see also 3 6 18 way of operation i e latching non latching type 19 effects of multiple overloads on multi circuit modules 3 3 3 Current sourcing digital outputs for direct current 3 3 3 1 Rated values and operating ranges Digital outputs shall comply with the ratings given in the following table 11 at the output voltage s stated by the manufacturer according to 3 2 1 1 and with IEC 947 5 1 for utilization category DC 13 35 ISAEC 1131 2 1992 Table 11 Rated values and operating ranges for current sourcing digital d
47. ae riz att ole i fey ri ear hy ge 7 all Lie I N aT i CR taen FIS LI ps Hre niin i a IETA t re t 7 C nye el rt PERS ay a l E hii ail RUDI C 1 TTUT he pests 2 eb pete gt h BaT i Ami iais i gt a ate nai i Lay Si sopat Fo ipi HT i PY chaste mon RTIA BL We Fri cya ere 7 Ne era Vae ME SE Pi MAN E iri LAT Ny i ce dies td iji n e Ni PHT WAT pent iy ata 2 ie ey ARPT a VEE ew pepo oan ANY Al FEIRA ok faa nenii ii Ms hk Ros Eyiti ai takati Per HER ini We WSI i ein TWh as ea mbar mH ENESE ELTA E nl Viele hie i sae Us Mh tt at in i ayi biR ad A Bi FERH F pi 4 ig 1a by HUET Gaisa Lit Jiji i UE LE baal ba site Mat ipsa bel eji Re NTT pipes PE jake ti Met Lee a eed ut lil FL ll E iii pi lt f Mie y 7 p i rt i JETE T he l I f ee eee a ress aap Paes ey 6 F ps Ps FE Pe eee i is fi i ited xiiit Til ances ben exes hr rp a hal TH Ih ijua i fi Ui diskak LL Ee i heat Ur ie E yias erep AE TT E mE ir oy ike z i ie eer ikl nt r ie ay HI BA P J i os TET j L H ta mite th ial vole Te ee L TT yy 7 tt ee mikaka Of Petey mitted a li I te iall alali At ena Br Backs j Ail nN d ip i ny vie aay my ih IH AAA LEELA ii Ly I ppi a r nt ste i UMI at a Maa Taare MEU TY rT LAUL AA CERTE zi MT eE a jod wes iii i sie w ee E Sa ae wu Mie ALES Ra iir Eiei meh ok rr part iE kii bilar E ae iNi i R ul ey
48. age drop at state 1 b hog Minimum output current load at state 1 i worst case output curve at state 1 ii when at state 0 c heak Maximum output current at state 0 ll worst case output curve at state 0 A given proximity switch shall be compatible with a given standard input curve ill impedance curve of the input if its curves and II do not enter the transition region and its aig is smaller than H min 31 ISAEC 1131 2 1992 Worst case steady states 0 and 1 shali be respectively at points A and B at crossings of tl with I and 1 NOTE This method may be used for any other type of static switch such as outputs etc 3 3 2 Current sourcing digital outputs for alternating currents 3 3 2 1 Rated values and operating ranges a c r m s Digital a c outputs shall comply with the ratings given in the following table 10 at the out put voltage s stated by the manufacturer according to 3 2 1 1 and IEC 947 5 1 utilization category AC 15 See item 9 of 3 3 2 3 for other utilization categories Table 10 Rated values and operating ranges for current sourcing digital a c outputs Min mA 10 5 100 Max A 0 28 1 1 Max V Max V 2 Figures between apply to module not equipped with RC network or equivalent surge sup pressors All other values apply to modules with suppression Rated current state 1 Current range for state 1 continuous at max voltage Voltage
49. al requirements such as noise immunity control RFI protection etc for functional earthing terminals except for marking requirements as given in 4 12 2 6 4 9 Interconnecting cables and cords 4 9 1 General The following requirements shall apply to interconnecting cords or cables provided by the manufacturer for the internal and or external wiring of PC system 4 9 2 Wiring internal to the PC system internal wiring 1 The insulation when provided on ail internal wiring of the equipment shall be rated for the voltage and the temperature conditions of use 63 ISNEC 1131 2 1992 2 All splices and connections shall be mechanically secure and provide electrical continuity 3 Internal wiring shall be so routed and s red that neither it nor related electrical connections are likely to be subjected to to stress or mechanical damage 4 Internal wiring that is subject to flexing in its intended use 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 6 3 5 5 4 This requirement does not apply to SELV circuits 4 9 3 Connectors and wiring external to the PC system external wiring NOTE This clause applies to the PC system and the manufacturer supplied cables with connectors only and does not apply to the whole industrial control system in which the PC system is employed 1 Cables and cords provided for the intercon
50. ance with or without repeaters 11 terminating devices if required 12 physical characteristics of the communication interface including isolation charac teristics maximum acceptable common mode voltage built in short circuit protections etc 13 type of standard link interface i e RS 232 RS 422 RS 485 RS 511 etc 14 functional and safety earthing specifications 15 procedures for making breaking logical and physica connection of a RIOS to a PC system e g on line 3 8 Peripherals PADTs TEs MMIs 3 8 1 Requirements 1 Peripherals which are not a permanent part of the PC system shall cause no malfunction of the system when making or breaking communication with an operating system 2 Connectors for the peripherals shall be polarized to prevent improper connection or the PC system shall be so designed that no malfunction occurs 3 The system consisting of the peripheral and the PC system shall be designed to ensure that the edited program executing in the PC system is functionally cence to the edited program displayed on the peripheral 4 If on line modification of the application program and or the modes of operation of the PC system by a peripheral is possible i e when the PC 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 program display may differ from application p
51. and accessible conductive parts frame enclosure protective earth terminal functionat earth terminal etc The voltage shali be applied between each isolated circuit sequentially and accessible conductive parts The test voltage shall be that given in table 17 in 3 10 2 correspond ing to the rated voltage and class of the circuit c Between isolated SELV circuits and other non SELV circuits The test voltage shall be applied between each isolated SELV circuit and the remaining non SELV circuits connected together to the earth The test voltage shall be 1500 V a c r m s or its equivalent peak value for the impulse and d c Pass fail criteria There shall be no unintentional flashover or breakdown of the insulation during the test Eventual operation of protecting devices provided on the units shall not be considered as a failure an intentional flashover is one which might be the result of the normal action of a Surge suppression device incorporated in the equipment 86 ISAEC 1131 2 1992 6 3 6 1 2 Protective earthing continuity test Requirement reference item 6 of 4 7 2 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 measure
52. and consequently interfering voltages at withstandable levels are noted in IEC 1131 4 The PC system shall comply with the requirements in table 16 NOTES 1 Conditions of use may require immunity to higher levels of electrical noise than the minimum given above The manufacturer may select such higher values given in annex C These higher levels shall be stated by the manufacturer and the tests conducted according to these levels 2 The reference document for detailed tutorial and consideration is IEC 801 44 ISAEC 1131 2 1992 Table 16 Electrical noise immunity requirements for PC system and stand alone peripherals notes 1 and 2 Electrical noise tests Electrical noise severity levels Maximum surge Digital I Os energy All power Digital I Os U lt 24V Notes Minimum source supplies U 224V Analog communi impseanice cation I Os Electrostatic discharge For level RH 1 ESD 3 For level RH 2 ESD 4 150 pF 150 Radioelectromagnetic field Conducted noise Fast transient Common mode 4 mJ spike at 2 kV on 0 200 2 Damped oscillatory wave Series mode NOTES 1 Tests are performed on basic PC system s representative configuration s constituted by the PC configuration and all peripherals that can be connected and which are intended for use under the normal service conditions If peripherals are claimed to be on line pluggable then the test pr
53. art below that correspond to the current practice may be used for basic and supplementary insulation up to pollution degree 2 and regardless of CTI In that case no type test is required compliance shall be verified by measurement Rated voltage of circuit Ug Clearance Creepage distances V a c r m s or V d c mm mm 50 ISAEC 1131 2 1992 4 3 1 Clearances relating to normal overvoltage category 4 3 1 1 Clearances for other than field wiring terminals Clearances associated with basic and supplementary insulation and clearances asso ciated with reinforced insulation class II equipment are given in table 18 They correspond to the impulse withstand voltage of table 7 in 3 10 2 Table 18 Minimum clearances in air corresponding to overvoitage category Il conditions except for field wiring terminals Derived from IEC 664 Rated voltage of circuit Uo Rated impulse withstand note 1 voltage notes 2 and 3 Minimum clearance Va c r m s or V dic V For basic and For supplementary reinforced At 2 000 m altitude insulation insulation NOTES 1 Rated voltage at the field wiring terminals of the device or circuit 2 See annex D correction factor for testing at other altitudes 3 1 2 ps rise time 50 us wide at 1 2 amplitude 0 6 J maximum energy 1 Clearances can be verified by mechanical measurement or by dielectric tests according to table 17 in 3 10 2 2 Clearances to walls of metal enclosures which may
54. ated expressing the result of a test 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 A ALLIS RRS SAEC 1131 2 1992 1 General 1 1 Scope This International Standard applies to programmable controllers and their associated peripherals such as programming and debugging tools PADTs test equipment TE and man machine interfaces MMIs etc Equipment covered in this standard is intended for use in overvoltage category II see IEC 364 4 443 in low voltage installations where the rated mains supply voltage does not exceed 1 000 V a c 50 60 Hz or 1 500 V d c for the control and command of machines and industrial processes Programmable controllers and the associated peripherals are considered as components of a control system and may be provided as enclosed or open equipment Therefore this Standard does not deal with the automated system in which the programmable controller system is but one basic component among many others including its application program Since programmable controllers are component devices overall automated system safety including installation and application is beyond the scope of this standard For further information reter to IEC 1131 4 which is intended to help users in reducing the risks How ever elec
55. ated through the use of suitable revision level indexes markings See 4 12 1 and shall comply with this standard NOTE A new type test may be required to confirm compliance 7 Where the manufacturer is allowed to select among several options he shall clearly specify in his catalogues and or datasheets those to which any portion of the PC system equipment complies This applies to severity classes of voltage drops i e PS1 or PS2 relative humidity i e RH 1 or RH 2 electrostatic discharges i e ESD 3 or ESD 4 types of digital inputs type or type II 6 3 Type tests 6 3 1 Equipment to be tested Basic PC system s shall consist of the main processing unit MPU remote input output station s RIOSs if applicable and appropriate peripherals that can be connected and which are intended for use under the norma service conditions If the PC system is of modular structure the MPU and each RIOS of the basic PC system s shall include at least one inter face module of each type listed below if such a module is supplied or recommended e digital d c input module digital d c output module e digital a c input module digital a c output module e analog input module analog output module e communication interface module appropriate catalogued options such as power supply units application memory ies processing unit s etc shail be used to build the basic PC system s Peripherals shal
56. c outputs Rated current state 1 I A on oas Current range for stage 1 at maximum voitage continuous Max A Voltage drop Not protected output Max V protected and short circuit proof Leakage current state 0 Temporary overload NOTES 1 For 1 Aand 2 A 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 compatibilities between d c outputs and d c inputs without additional external load are as follows Rated output current A 0 1 0 25 0 5 1 2 Type 1 yes no no no no Type 2 yes yes yes yes no With adequate additional external load all d c outputs may become compatible with all type 1 and type 2 d c inputs 3 3 3 2 Additional requirements Other requirements are the same as for current sourcing outputs for a c as defined in 3 3 2 2 except for protected outputs the limit is 1 2 instead 1 1 for electromechanical relay outputs AC 15 is replaced by DC 13 3 3 3 3 Information to be provided by the manufacturer 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 3 3 2 3 except that the specification of commutation for zero voltage crossing does not apply and AC 12 AC 13 AC 14 are replaced by DC 12 and DC 13 36 ISAEC 1431 2 1992 3 4 Analog I Os
57. ce dure to be agreed upon by the manufacturer and the user 6 3 11 Verification of peripheral characteristics Requirement reference subclause 3 8 1 Type tests are not required all characteristics non tested shall be verifiable under a proce dure to be agreed upon by the manufacturer and the user 6 3 12 Verification of basic PC system self tests and diagnostics Requirement reference subclause 3 11 2 Type tests are not required all characteristics non tested shall be verifiable under a proce dure to be agreed upon by the manufacturer and the user 6 3 13 Verification of markings and manufacturer s documentation Requirement references subclause 4 12 and clause 5 Verify that requirements of 4 12 and clause 5 are met 103 ISAEC 1131 2 1992 6 4 Routine tests 6 4 1 Dielectric strength tests The manufacturer shall either perform the standard test see 6 4 1 1 or the optional test see 6 4 1 2 6 4 1 1 Standard dielectric strength test withstand test Table 55 Standard routine a c and d c dielectric strength withstand test _Subclause 3 10 Selection of sample s e SELV circuits 0 lt Uo lt 50 No test Sample testing according to manufacturer s instructions All units shall be tested As specified in 6 3 6 1 1 note 1 e 50 lt Uo Test methods and application points Rated voltage of circuit Ue Test voltages at O m altitude note 2 V a c r m s or
58. ce for example the protective circuits serving the other parts of the PC system shall not be interrupted 4 Protective earthing requirements are specified in 4 7 42 2 Class I equipment 1 In certain cases such as signal level terminals less than 30 V r m s fimiting impedance may be used in lieu of double insulation provided the limiting impedance limits the exposed terminals to a current of 5 mA and open circuit voltage of 30 V rm s Or 42 4 V d c 2 Class ii 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 3 Class equipment may be provided with means for connection te earthing field terminals for functional purposes such as radio frequency interterences suppression provided the double insulation system is still provided for protective purposes ISAEC 1131 2 1992 4 2 3 Class M equipment and safety extra low voltage SELV circuits 1 isolation requirements between SELV circuits and the mains power supply are expressed in 3 10 2 2 Class lil equipment may be provided with means for functional earth field wiring 3 Wiring for SELV circuits shall be either segregated from the wiring for circuits other than SELV or the insulation of all conductors shall be rated for the higher voltage Alternatively earthed screening or additional in
59. ce of the equipment measured along the surface of the insulation 1 4 10 current sinking The act of receiving current 1 4 11 current sourcing The act of supplying current 1 4 12 diversity factor of an output module Ratio of the permissible tota current total output current to the sum of all maximum rated currents of multi channel output module operating at the most adverse combination of normal service conditions 1 4 13 earth The conducting mass of the Earth whose electric potential at any point is conventionally taken as zero IEV 151 01 07 Synonymous with protective earth 1 4 14 earth functional protective 1 functional earth A low impedance path between electrical circuits and earth for non safety purposes such as noise immunity improvement 2 protective earth A low impedance path under fault conditions including high voltage and or current between the electrical circuit and earth to minimize the risk to the operator 1 4 15 enclosure A final mounting housing which provides protection against acci dental contact with live and or moving parts See equipment open and equipment enclosed 1 4 16 equipment or circuit class class li class IH Class numbers designate the means by which electric shock protection is maintained in normal use and likely fault conditions of the installed equipment 1 class circuit or equipment Circuit or equipment in which protection against electric shock does not rely
60. cting capacity 0 0 00 eee eens 61 4 6 3 Information to be provided by the manufacturer 62 4 7 Provisions for protective earthing 0 00 00 0000 cece eee eee 62 4 7 1 Constructional requirements 0 0 000000000 cee eee eens 62 4 7 2 Protective earthing terminal 000 000 cee ee eee 63 4 8 F nctional earthing peee erai weed Ceo LE wee Soe e E aes Hoenn eaes 63 4 9 Interconnecting cables and cords 0 0 00 0 c eects 63 Aco GENea gasera en ic mats ob Bed a ee eee ew ES are ee 63 4 9 2 Wiring internal to the PC system internal wiring 005 63 4 9 3 Connectors and wiring externals to the PC system external wiring 64 2 ISAEC 1131 2 1992 4 9 4 Internal and external wiring 00 c ee eee 64 4 10 Plugging unplugging of removable units 000 0 ce eee 64 4 11 Battery rogue ma M S 62 244 46 a6 eee ab he a eck a BE Eee A S 65 Mae CIN EE E tan py E as Hite a ere OL oak aera ns a eek 65 4 11 2 Non rechargeable batteries Re ee eee ee ee 65 ATS Memory back up 44 45 5 ea ee hae Bn dee eh i a eee Pa SERS 65 4 12 Markings and identification 0 0 0 000 000 eee 65 4 12 1 General marking requirements 0 0 00 002 ccc eee 65 4 12 2 General identification requirements 0 00000 eee eee 66 5 Information to be provided by the manufacturer 0 00 0 000000 cee eee 67 5
61. d 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 resistance shall not exceed 0 1 Q 6 3 6 1 3 Stored energy injury risk test Requirement reference subclause 4 5 3 3 Selection of samples Portable peripherals connected to the mains power supply by use of a cordset removable or fixed shall comply with this test Test description the test shall be applied to each individual pin of the plug and to the receptacle the cordset shall be disconnected from the mains power supply the peripheral being in operation ina delay not exceeding 1 s from the instant of deconnection and for each of the pins receptacle both the voltage and the short circuit current between the pin or recep tacle tested and the local protective earth shall be measured Pass fail criteria For all tests i e one test per pin or receptacle the voltage shall not exceed 42 4 V peak or d c or 30 Vr m s and the discharge current shall not exceed 5 mA 6 3 6 2 Noise immunity tests 6 3 6 2 1 Electrostatic discharge test The following test is considered to be a first step in the direction of commonly used tests for the qualitative evaluation of the performance of electronic equipment 87 ISAEC 1131 2 1992 Table 43 Electrostatic discharge immunity test Reference test 1EC 80
62. d by the follow ing test requirements which apply to fixed equipment as well as to unpackaged portable and hand held portable equipment see exceptions in 2 1 3 2 They do not apply to equipment containing assemblies other than PC systems and or associated peripherais Experience shows that equipment passing these tests are suitable tor industrial use on stationary installations 2 4 3 1 Vibrations immunity requirements are 19 ISMEC 1131 2 1992 Table 4 Sinusoidal vibrations service conditions for PC systems notes 1 2 and 3 Frequency range Continuous Occasional Hz 10s f lt 57 0 0375 mm amplitude 0 075 mm amplitude 57s fs 150 0 5 g constant acceleration 1 0 g constant acceleration 150 lt f Not defined Not defined NOTES 1 Applicable to each of three mutually perpendicular axes 2 Test according to IEC 68 2 6 test Fe 3 The manufacturer shall specify the method of mounting portable and hand held portable peripherals on the test equipment 2 1 3 2 Shocks immunity requirements are Occasional excursions to 15 g 11 ms half sine in each of three mutually perpendicular axes IEC 68 2 27 NOTES 1 Devices containing CRTs are excluded from this requirement 2 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 2 1 3 3 Free falls Immunity requirements for type tests are
63. d c is assumed for the connecting leads 3 Maximum values of voltage drops of digital outputs for d c and a c U 4 These values of ase and fog are also those adopted in IEC 947 5 2 leak 108 Doty ciate ISNEC 1131 2 1992 Annex C informative Recommended higher immunity levels for electrical noise tests If higher immunity levels than the minimum stated in 3 9 1 are required the following electrical noise severity levels given in table C 1 below are recommended as standard When severe noise conditions exist levels higher than those given in this table are subject to agreement between the manufacturer and the user For further information regarding description of typical noise producing environments and the approximate severity levels see IEC 1131 4 and IEC 801 Table C 1 Electrical noise tests for PC system and stand alone peripherals notes 1 and 2 Recommended levels higher than minimum required Electrical noise tests Electrical noise severity levels Maximum surge Digital Os energy All power Digital 1 Os U lt 24V Minimum source supplies U 224V Analog 1 Os impedance communication Os Electrostatic discharge Level RH 2 ESD 4 150 pF 150 Q 15 kV Radiated electromagnetic field 10 V m Conducted noise Fast transient Common mode 4 mJ spike at 2 kV on 50 Q Damped oscillatory wave Series mode Fo
64. d the self tests which are executed to drive this alarm output 3 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 3 7 3 11 3 Information to be provided by the manufacturer In addition to the requirements of clause 5 the manufacturer shall provide the following information through convenient documentation and marking 1 description of tests and diagnostics which are implemented and when they are executed i e permanently periodically upon user s application program request during start up procedure etc 2 correct functioning state and driving conditions of the alarm output s see 3 11 2 4 Mechanical requirements 4 1 General This section specifies mechanical construction requirements for PC systems equipment i e MPU RIOSs permanently non permanently installed peripherals Components connected to the mains power supply of the installation such as power supplies I O modules communication interfaces memory subsystems are considered subject to the provisions of this clause 48 ISAEC 1131 2 1992 The programmable controller equipment and the associated peripherals shalt be constructed to withstand the conditions stated in clauses 2 end 8 4 2 Protection against electrical shock hazard t Each entity of the PC system shall be des
65. dation of the Industrial Process Measurement and Control Sectional Committee ET 18 and approval of the Electrotechnical Division Council This standard constitutes Part 2 of a series of standards on Programmable Controllers and their associated peripherals and should be read in conjunction with the other parts of the series The following standards are being brought out in this series Programmable controllers Part 1 General information Part 2 Equipment requirements and tests Part 3 Programming languages Part 4 User guidelines Part 5 Communications The text of IEC Standard has been approved as suitable for publication as Indian Standard without deviations CROSS REFERENCES 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 place are listed below along with their degree of equivalence for the editions indicated International Standard Corresponding Indian Standard Degree of Equivalence IEC 38 1983 IS 12360 1988 Voltage bands for electrical installa Technicaly tions including preferred voltages and frequency equivalent IEC 50 151 1978 IS 1885 Part 57 1982 Electrotechnical vocabulary Technically Part 57 Electric and magnetic circuits equivalent IEC 50 441 1984 IS 1885 Part 17 1979 Electrotechnical vocabulary Technically Part 17 Switchgear and controlgear first revision equivalent
66. dentification of eacn module and VO channel on or near to the modules 4 12 2 3 External wiring terminals identification External wiring terminals shail 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 mark ing shail be provided 4 12 2 4 Live parts A live part exceeding SELV limits and likely to be mistaken as dead metal non energized metal and exposed to personnel under normal installation or maintenance shall be marked with the following Dangerous voltage symbol 417 IEC 5036 a 4 12 2 5 Protective earth terminals markings 1 The protective earth terminals markings shall be durable and clearly identifiable 2 The identification shall be achieved by the notation PE according to 5 3 of IEC 445 or by a graphical symbol for use on equipment 66 ISMEC 1131 2 1992 3 The graphical symbo to be used is the symbol 417 IEC 5019 a shown below in compliance with IEC 417 which shall progressively supersede the previously recom mended symbol 41 7 lEC 5017 a D 4 12 2 6 Functional earth terminals markings Functional earth terminals i e used for non safety purposes such as noise immunity improvement shall be marked with the following symbol 417 IEC 5018 a D 5 information to be provided by the manufacturer 5 1 General The manufacturer shall provide users with intormation required for the application desig
67. der 3 3 and the requirement of 3 3 1 3 are met 6 3 8 3 Verification of digital outputs 6 3 8 3 1 Operating range test Requirement reference subclauses 3 3 2 1 3 3 2 2 and 3 3 3 1 Verify that all requirements are met Test procedures Current range Under consideration Voltage drop Under consideration Leakage current Devices circuits intended for output protection shail not be removed Temporary overload According to IEC 947 5 1 AC 15 or DC 13 as applicable For short circuit proof outputs the current values shall be respectively 20 2 two times the rated value as given in 3 3 2 2 9S ISAEC 1131 2 1992 6 3 8 3 2 Test of protected not protected and short circuit proof outputs Tabie 54 Overload and short circuit tests for digital outputs C Subclauses 3 3 2 2 a c outputs and 3 3 3 2 d c outputs Preconditioning 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 According to PF VP 6 3 2 2 2 5 21 initial measurements prospective currents k x lo 1 2 1 3 1 5 note 1 e duration of test min 5 5 5 5 5 e order of trials first series at T min 1 2 3 4 5 second series at T max 6 7 8 9 10 e time intervals between tests 10 min lt time intervals lt 60 min Application of the tests e protected
68. determining the comparative and the proof tracking indices of Solid insulating materials under moist conditions IEC 255 4 1976 Electrical relays Part 4 Single input energizing quantity measuring relays with dependent specified time IEC 364 4 443 1990 Electrical installations of buildings Part 4 Protection for safety Chapter 44 Protection against overvoltages Section 443 Protection against overvoltages of atmospheric origin or due to switching IEC 417 1973 Graphical symbols for use on equipment Index survey and compilation of the single sheets IEC 445 1988 Identification of equipment terminals and of terminations of certain designated conductors including general rules of an alphanumeric system IEC 529 1989 Degrees of protection provided by enclosures IP Code IEC 664 1980 Insulation co ordination within low voltage systems including clearances and creepage distances for equipment IEC 695 2 1 1980 Fire hazard testing Part 2 Test methods Glow wire test and guidance IEC 707 1981 Methods of test for the determination of the flammability of solid electrical insulating materials when exposed to an igniting source IEC 801 2 1991 Electromagnetic compatibility for industrial process measurement and control equipment Part 2 Electrostatic discharge requirements IEC 801 3 1984 Electromagnetic compatibility for industrial process measurement and control equipment Part 3 Radiat
69. drop state 1 Non protected output Protected and short circuit proof Leakage current state 0 Solid state outputs Electromechanical outputs Max mA Max mA Repetition rate for temporary overload Operating cycles min Solid state outputs Relay based outputs Min Min NOTES 1 R M S currents and voltages 3 Leakage current for solid state outputs greater than 3 mA imply the use of additional external loads to drive type 2 inputs 4 Typical waveform for temporary overloads normal conditions of use are shown in figure 4 The test method given in IEC 947 5 1 applies to solid state outputs for normal conditions of use except that the repetition rate shall be as given in the table For abnormal conditions of use the requirements given in IEC 947 5 1 apply 32 ISHEC 1131 2 1992 Currents A 10le 2 cycles at Fn Fn rated line frequency ON time lt OFF time OFF time ON time Operation time e Relay OUTPUT Solid state OUTPUT 0 25 A tto5A t3 10 s tg 1s tg 2s io RE e e een mee 0 to t3 time s LEC 957192 Figure 4 Temporary overload waveform for digital a c outputs NOTE in IEC 947 5 1 the curve shown in figure 4 is named AC 1 normal conditions of use 3 3 2 2 Additional requirements Output indicators Each output channel shall be provided with a lamp or equivalent means to
70. e conditions limits and or frequencies beyond the normal conditions limits the PC system shall either maintain normal operation or go to a predefined state and have a clearly specified behaviour until normal operation is resumed Pass fail criteria During the tests the PFVP 6 3 2 2 shall insure that the behaviour of the basic PC system is as specified by the manufacturer and that there is no change not caused by the PFVP test program and no erratic or unintended conditions of any kind 6 3 7 3 2 Gradual shut down start up test Table 50 Gradual shut down start up test Requirements references Subciause 3 2 1 2 items 6 and 7 of 3 2 3 item 17 of 3 3 2 3 Preconditioning The behaviour of the basic PC system shall be according to PFVP 6 3 2 2 at minimum operational voltage and frequency test A of 6 3 7 1 1 and at maximum operational voltage and frequency test B of 6 3 7 1 1 Test description See figure 11 test A e initial final conditions Power supply at rated values Uo Fa e lowest voltage V O zero e speed of voltage decrease increase V s Uo 60210 e waiting time at lowest voltage s 10s 20 _ number of trials 3 13 lt time interval lt 10s According to PFVP 6 3 2 2 The voltage at which the basic PC system starts the manufacturer s specified shut down sequence or initiates a behaviour not in accordance with the PFVP during the decreas
71. e to the board insulation to result in an effectively solid insulation o as to exclude moisture and pollution and to withstand the specified overvoitages given in 3 10 2 4 Suitable for all material groups and pollution degrees 1 2 and 3 5 No test is required if the manufacturer provides evidence that the protective coating has been tested according to either the test given in 6 3 5 5 7 or an equivalent acceptable independent laboratory test 6 A test board coated but without components shail withstand the appropriate dielectric test voltage given in 3 10 2 7 For ali materiai groups 8 For material groups li Ila 9 GCreepage and clearance distances between circuits shall be those corresponding to the highest working voltage and the corresponding dielectric withstand voltage 10 Maximum recurring peak voltages in normal operation shall be limited to the values in 4 3 3 2 to prevent degradation of insulation by partial discharges ISIEC 1131 2 1992 4 3 3 2 Creepage distance requirements for recurring peak voltages 4 3 3 2 1 Rationale The phenomenon of partial discharges will occur on a surface which is subjected to long periods of high humidity and recurring peak voltages impulses These recurring peaks will dry out small areas between the conductors which will then flash over giving rise to small sections of tracking Eventually total tracking will occur between conductors and breakdown occurs The values given in the
72. ed Initial measurement Conditioning Temperature 476 C 42 C 9htih 25 C 3 C 96htT1h Duration of exposure Measuring and or loading during conditioning None Recovery procedure IEC 68 2 2 test Bb IEC 68 2 1 test Ab 1h minimum See 6 3 3 no condensation note 1 time climatic conditions special caution e power supply Power supply unconnected According to PFVP 8 3 2 2 Final measurements NOTE All external and internal condensation shall be removed by air flow prior to connecting again the basic PC system to a power supply 74 ISNEC 1131 2 1992 6 3 4 3 Variation of temperature Table 32 Change of temperature withstand and immunity tests as Withstand test note 1 immunity test note 2 Preconditioning According to manufacturer s specifications According to PFVP 6 3 2 2 Initial measurements Conditioning Power supply unconnected Low temperature 25 C 3 C 5 C 2 C note 3 High temperature e open equipment 70 C 2 C 70 C 42 C 3h 30 min 55 C 2 C note 3 40 C 2 C note 3 3h amp 30 min e enclosed equipment Exposure time at each temperature Transport time Less than 3 min Not applicable 3 C min 0 6 C min 5 Temperature variation speed Not applicable 2 Number of cycles
73. ed electromagnetic field requirements IEC 801 4 1988 Electromagnetic compatibility for industrial process measurement and control equipment Part 4 Electrical fast transient burst requirements IEC 801 5 199X Electromagnetic compatibility for industrial process measurement and control equipment Part 5 Surge immunity requirements under consideration IEC 947 1 1988 Low voltage switchgear and controlgear Part 1 General rules IEC 947 5 1 1990 Low voltage switchgear and controlgear Part 5 Control circuit devices and switching elements Section One Electromechanical control circuit devices 16 ISNEC 1131 2 1992 IEC 947 5 2 1992 Low voltage switchgear and controlgear Part 5 Control circuit devices and switching elements Section 2 Proximity switches IEC 950 1991 equipment incli Iding electrical business wit aw Fy eras fe eee Ref wae es re ee we ISO IEC 9506 1 1990 Industrial automation systems Manufacturing Message Specifi cation Part 1 Service definition ISO IEC 9506 2 1990 Industrial automation systems Manufacturing Message Specifica tion Part 2 Protocol specification 2 Service conditions and physical environment related requirements 2 1 Normal service conditions It is the user s responsibility to ensure that the following service conditions are not exceeded 2 1 1 Physical environmental conditions 2 1 1 1 Operating ambient air temperature
74. ed to generate table 9 in 3 3 1 2 with some exceptions explained in the notes D C equations A C equations UH max 1 25 Un UH max 1 1 Ua UH min 0 8 U Varop TV UH min 0 85 Usroo 1V notes 1et2 UT max UH min UT max UH min UT min 0 2 U UT min 0 2 U note 1 UL max UH min H lt IT min UL max UH min I lt IT min UL min 3 V 24 V d c UL min 0 UL min 6 V 48 V d c UH max UT min IT min heak 1 mA nominal voltages lt 120 V IT min diti a IT min heag 2 MA nominal voltages gt 120 V Z Empirical worst case relay contact Open contact impedance 100 KQ UL min ND Not defined IL min 0 Type 1 inputs Type 1 inputs iH max IT max IL max 15 mA IH max IT max IL max 15 mA IH min IT min 1 MA IH min IT min 1 mA Usrop 3 V 3 3 3 1 Usrop 5 V 3 3 2 1 Note 3 Type 2 inputs Type 2 inputs IH max IT max IL max 30 mA IH max IT max IL max 30 mA IH min hog 1 MA IH min hog 1 MA leak IT max 1 5 mA hear fa MaX 3 MA note 4 dcop UD max 8 V iF UD max 10 V a c note 4 hold I min 5 mA ee I min 5 mA note 4 NOTES 1 For all 100 110 120 V a c and all 200 220 230 240 V a c inputs U has been respectively selected as 100 V a c and 200 V a c in order to allow compatibility of a single module with various supply voltages 2 1 V drop a c r m s or
75. eet the levels specified in every country of concern 45 ISHEC 1131 2 1992 3 10 Dielectric properties 3 10 1 General isolation may be provided for either safety i e protection against electric shock or functional purposes e g RFI immunity Isolation requirements clearance creepage for safety purposes are given in 4 3 3 10 2 Dielectric withstand requirements 1 Unless otherwise specified by the manufacturer clearance and creepage require ments of 4 3 shall be verified by mechanical measurement where possible 2 If mechanical measurement is not performed the electrical test of 6 3 6 1 1 shall be carried out Exceptions This test need not be done between isolated SELV circuits and accessible conductive parts frames enclosures earth terminal etc on units parts of the basic PC system which have been tested separately according to the relevant standards provided a the values given in table 17 below have been met and b their dielectric strength is not impaired by assembly between isolated circuits on printed wiring boards providing the specified clearances and creepage distances have been met See 4 3 3 When subject to the dielectric test insulation between isolated circuits other than SELV circuits and a other non SELvV circuits b accessible conductive parts shall withstand the application of test voltage corresponding to their class and their rated voltage as specified i
76. er installation wiring troubleshooting user programming and commissioning of the PC system They shall include as a minimum 1 All information which is required throughout all parts of this standard see table 29 in 5 2 2 All information contained in catalogues and data sheets as required in 5 2 3 Installation and commissioning instructions 4 Programming and troubleshooting instructions 5 Maintenance and service requirements 6 Accessory and spare parts lists e g fuses 5 3 3 Technical documentation The manufacturer optionally may provide a set of documents which contain more informa tion than those given in the users manual such as schematic diagrams internal or external data protocols bus assignments physical dimension requirements energy available firmware internal test programs or repair procedures etc 5 4 Information on compliance with this standard Compliance with parts 1 and 2 of this standard cannot be claimed unless ali tests and verifications required in this part are complied with See 6 2 for details 5 5 Information on reliability f the manufacturer provides values of the mean time between failures MTBF of any subassembly or module and of the type test configuration s basic PC system s under normal service conditions the manufacturer shall also explain the method used to determine it 69 ISAEC 1131 2 1992 5 6 Information on safety The manufacturer s data shall include the f
77. es other than those given in the table such as 100 V a c 110 V a c 200 V a c 240 V a c 380 V ac or 110 V d c 125 V d c the tolerances given in the table and notes 1 and 3 apply These voitage tolerances shall be used to calculate the input limits of 3 3 1 2 using the equations in annex B 6 Three phase supply 7 For power supplies for analog Os see item 5 of 3 4 1 2 3 and item 3 of 3 4 2 2 3 24 ISAEC 1131 2 1992 3 2 1 2 Voltage drops and interruptions 1 For short disturbances of the supply as defined in table 8 below the PC system including RIOSs and non permanently installed peripherals see 3 7 shall maintain normal operation 2 For longer interruptions of the supply ies the PC system shall either maintain normal operation or go to a predefined state and have a c gary specified behavior until normal operation is resumed NOTE Outputs and fast responding inputs energized by the same supply ies will respond to these power supply variations Table 8 Normal service conditions Voltage drops and interruptions Interruption Time interval Low voltage time between drops 2is D C supply Severity level PS1 Any voltage under lower operational Severity level PS2 lt 10ms A C supply lt 0 5 period note 1 U min NOte 2 NOTES 1 Any arbitrary phase angle see test procedure in 6 3 7 2 U nin isthe U at minimum tolerance
78. esignated conductors including general rules of an alphanumeric system Im OU I Z ivy 1 Electromagnetic compatibility TOI in OUSIA ment Part 2 Electrostatic discharge requirements IEC 801 3 1984 Electromagnetic compatibility for industriai process measurement and controj equip ment Part 3 Radiated electromagnetic field requirements IEC 801 4 1988 Electromagnetic compatibility for industrial process measurement and control equip ment Part 4 Electrical fast transient burst requirements IEC 801 5 Electromagnetic compatibility for industrial process measurement and control equip ment Part 5 Surge immunity requirements under consideration IEC 947 5 2 1992 Low voltage switchgear and controlgear Part 5 Control circuit devices and switching elements Section 2 Proximity switches ISO IEC 9506 1 1990 Industrial automation systems Manufacturing message specification Part 1 Service definitions iw WH ISO IEC 9506 2 1 990 Industrial automation systems Manufacturing message specification Part 2 a Pees Pee rt rat os D PIOLO SPeVIeativil Only the English language text given in the International Standard has been retained while adopting it as indian Standard and as such the page numbers given here are not the same as in IEC publication For the purpose of deciding whether a particular requirement of this standard is complied with the final value observed or calcul
79. he conditions defined in 6 2 shall not be impaired 2 Though test procedures are not defined in detail all tests which are referenced shall be performed 3 Unless otherwise specified in this subclause all tests shall be carried out twice on the same I O channel s First test at minimum service temperature 7 min i e 5 C or T min given in 2 1 1 1 Second test at maximum service temperature 7 max i e 40 C 55 C or T max given in 2 1 1 1 4 It is not required to test more than one analog input channel and one digital input channel of each type but all different types which are represented in the basic PC system shall be tested 5 Ali channels of multi channel output modules shall be tested see item 10 of 3 3 2 3 6 3 8 2 Verification of digital inputs 6 3 8 2 1 Operating range test Requirement reference subclause 3 3 1 2 Verify that all requirements are met Test procedures Under consideration 6 3 8 2 2 Reversal of signal polarity test withstand test Requirement reference Item 4 of 3 3 1 4 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 The device shall pass the PFVP see 6 3 2 2 Protective devices such as fuses may be reset prior to verification 98 ISAEC 1131 2 1992 6 3 8 2 3 Verification of other requirements Verify that the general requirements for digital 1 Os un
80. hing NOTE The requirements specified below do not apply to SELV circuits where protective earthing is not required 4 7 1 Constructional requirements 4 7 1 1 Class equipment 1 The accessible parts e g chassis framework and fixed metal paris of metal enclosures other than those which do not constitute a danger shall be electrically inter connected and connected to a protective earth terminal for connection to an external protective conductor This requirement can be met by the normal structural parts provid ing adequate electrical continuity and applies whether the equipment is used on its own or incorporated in an assembly 2 Cords or cables that supply transportable peripherals shall be provided with a protective earthing conductor 3 Protective earthing conductor insulation shall be green with a yellow stripe 4 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 62 ISAEC 1131 2 1992 dielectric test voltage of table 17 in 3 10 2 for reinforced insulation corresponding to the highest rated operational voltage of the unit 4 7 1 2 Class ll equipment Class ll equipment may have an internal functional bonding conductor but shall not be provided with an earthing terminal or an earthing conductor in the supply cord 4 7 2 Protective earthing terminal lf the PC system is provided with a protective earth
81. igned to meet class l class or class IHi specifications as defined in 4 2 1 4 2 2 or 4 2 3 Open equipment is not required to meet IP2X requirement However warning labels hazard symbol 417 EC 5036 and or mechanical disconnect means shali be required on the final system enclosure to be provided by the user to minimize the risk of accidental shock hazard during maintenance Opening of the enclosure shall only be possible by means of a key or tool 3 Any class I or class li enclosed equipment shalt be IP2X according to IEC 52S 4 Apertures in class H equipment shall be tested with the test pin as specified in fig ure 20 and 2 1 2 of EC 950 3 Leakage current of cord connected devices shali comply with the limits specified in IEC 956 NOTE The insulating properties of lacquer enamel ordinary paper cotton oxide film on metal parts and beads shail not be relied upon to give the required protection against accidental contact with hazardous live parts 4 2 1 Class I equipment 1 For equipment for use with a flexible cord such as PADTs this provision includes a protective conductor as part of the cordset i e earth ground conductor 2 Some accessible conductive parts of a PC system which do not constitute a danger need not be connected to the protective circuit of the PC system This applies to screws rivets and nameplates 3 When a part of the PC system is removed from the enclosure for normal mainte nan
82. ility to provide that protection when it is needed Short circuit proof outputs For outputs stated by the manufacturer to be short circuit proof 4 For all output currents greater than max and up to 2 times the rated value the output shall operate and withstand temporary overload s Such temporary overload s shall be specified by the manufacturer 5 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 PC system shall return to normal operation 6 For output currents in the range of 2 times to 20 times or for temporary over load s beyond the limits specified by the manufacturer item 1 above the module may require repair or replacement 7 During an overload of 2 applied for 5 min there shall be no evidence of risk of fire or electrical shock and immediately after the overload the maximum temperature rise of the I O insulation shall not exceed the value specified in 4 4 2 See test procedure in 6 3 8 3 2 Not protected outputs For outputs stated by the manufacturer to be not protected their operation with the pro tective devices provided or specified by the manufacturer shall meet all the requirements stated for the short circuit proof outputs Electromechanical relay outputs Electromechanical relay outputs shall be capable of performing at least 0 3 million oper ations at the AC 15
83. in IEC 68 2 30 power supply _ Power supply disconnected note Final measurements Dielectric test and insulation test in addition to PEVP 6 3 2 2 NOTE All external and internal condensation shall be removed by air flow prior to connecting again the basic PC system to a power supply 76 ISAEC 1131 2 1992 6 3 5 Mechanical tests 6 3 5 1 Vibrations type test associated with normal service conditions Table 34 immunity vibration test Preconditioning According to manufacturer s specifications According to PFVP 6 3 2 2 initial measurements Details of mounting support According to manufacturer s specifications for portable and hand held portable equipment Motion Sinusoidal Vibration amplitude acceleration 10 Hz lt f lt 57 Hz 57 Hz lt f lt 150 Hz 0 075 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 three mutually perpendicular axes According to PFVP 6 3 2 2 According to PFVP 6 3 2 2 Measurement and verification during loading Verification after tests 6 3 5 2 Shocks type test associated with normal service conditions Table 35 Immunity shock test Preconditioning According to manufacturer s specifications According to PFVP 6 3 2 2 Initial measurements Details of mounting s
84. in table 7 PS1 applies to PC systems supplied by battery PS2 applies to PC systems energized from rectified a c supplies and or long d c lines 3 2 1 3 Non periodic overvoitages See 2 1 2 4 3 2 2 Memory back up Power back up for volatile memories shall be capable of maintaining stored information for at least 300 h under normal service conditions 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 It shall be possible to change or refresh power back up without loss of data in the backed up portions of memory See also 2 3 3 6 3 and 4 11 lf a memory back up battery is provided a warning of low battery voltage shall be provided 25 ISNEC 1131 2 1992 3 2 3 Information to be provided by the manufacturer In addition to the requirements stated in clause 5 the manufacturer shall provide the following information 1 data to allow selection of a suitable power distribution network to provide specified voitage at each power utilization point This information includes peak inrush repetitive peak and steady state r m s input currents under full load conditions 2 external terminal identification for power supply interfaces 3 typical example s for power supply system s 4 special supply installation requirements if
85. in this standard 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 figure 2 _ 2 APC system may be offered with interfaces which 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 3 3 1 Digital inputs current sinking 3 3 1 1 Terminology U I operation regions Figure 3 below represents graphically the limits and operating ranges which are used herein to characterize current sinking digital input circuits Operating region consists of on region transition region and off region It is neces sary to exceed both UT min and T min to leave the off region and to exceed H min before UH min to enter the on region all input U I curves shail remain within these boundary conditions The region below zero volts is a valid part of the off region for d c inputs only The figure also presents a graphical illustration of the method explained in 3 3 1 5 for determination of compatibility between a 2 wire proximity switch curve l worst case at State 1 curve II w
86. indicate the Output state 1 condition when the indicator is energized Protected outputs For outputs stated by the manufacturer to be protected 1 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 2 after resetting or replacement of the protective device alone as applicable the PC system shall return to normal operation 3 during any overload there shail be no evidence of risk of fire or electrical shock and immediately after any overload the maximum temperature rise of the I O insulation shall not exceed the value specified in 4 4 2 Optional restart capabilities may be selected among the three following types i automated restart protected output a protected output which automatically recovers after the overload is removed ii controlled restart protected output a protected output which is reset through signals e g for remote control ii _manual restart protected output a protected output which implies a human action _ to recover the protection may be fuses electronic interlocks etc See test procedure in 6 3 8 3 2 33 ISNEC 1131 2 1992 NOTES 1 Operation under overload condition for an extended period of time may affect operating life of the module 2 The protected outputs will not necessarily protect the external wiring It is the user s responsib
87. ing power supply Rated Power I O U supply signals NOTES 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 30 19 2 V d c for 24 V d c and 60 38 4 V d c for 48 V d c Tolerance Min Max Tolerance Min Max 15 20 id 15 10 id 5 4 5 id id id 2 See item 5 of 3 3 1 2 if type 2 digital inputs are likely to be used 3 A C voltage is in terms of the total r m s voltage values measured at the point of entry to the equipment 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 O and at 180 phase angle The total content of harmonics of the power supply to the PC system may be affected when the energy source output impedance is relatively high with regard to the input impedance of the PC system power supply sizing a dedicated power source such as an inverter for a PC system may require an agreement between the user and the manufacturer Use of line conditioner should be considered See EC 1131 4 4 These rated voltages are derived from IEC 38 5 For incoming voltag
88. ing terminal class equipment the following requirements also apply in addition to the previous general connection speci fications 1 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 2 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 remov able cordset 3 the protective earthing terminal shall be of the screw type and shall be made of brass or other suitable non corrosive material 4 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 5 protective earthing terminals and earthing contacts shall not be electrically connected to the neutral terminal at the PC system NOTE A terminal intended to be connected to the PEN protective earth neutral conductor may fulfil the function of the protective earthing terminal 6 the protective earthing terminal and subsequent protective equipment internal to the PC system shall provide 0 1 Q protective earthing continuity under 30 A continuous fault conditions 7 the protective earthing terminal shall have no other function 4 8 Functional earthing There are no construction
89. ing voltage sequence e time interval between trials Measurement and verification during loading e voltage shut down limit SDL e average SOL SOL The average of three measured SDL av Pass fail criteria According to 6 3 7 3 1 94 coped Sr ees ISNEC 1131 2 1992 6 3 7 3 3 Gradual supply voltage variation tests Table 51 Gradual supply voltage variation tests Reference test Requirements references Preconditioning Description of tests initial final conditions lowest voltage V speed of voltage decrease increase V s Waiting time at lowest voltage s number of trials time interval between trials Measurement and verification during loading Pass fail criteria Subclause 3 2 1 2 items 6 and 7 of 3 2 3 item 17 of 3 3 2 3 The behaviour of the basic PC system shail be according to PFVP 6 3 2 2 at minimum operational voltage and frequency test A of 6 3 7 1 1 and at maximum operational voltage and frequency test B of 6 3 7 1 1 Test B Test C fast variations slow variations see figure 11 see figure 11 Power supply at rated values U FA O zero 0 9 SDL t 10 note U 1 5 10 U 60 t 10 O zero O zero 3 3 1s lt time intervals 5s According to PFVP 6 3 2 2 According to 6 3 7 3 1 NOTE SDL is a result of gradual shut down test see 6 3 7 3 2 95 ISAEC 1131 2 1992 Ug min a Slope V s Ye 10 Slope V s Yes
90. inimum spacing required to assure adequate cooling under normal service conditions 59 ISNEC 1131 2 1992 4 5 2 Moving parts in non portable devices Moving parts e g fans disk drives printers etc located within non portable devices which could cause possible injury to service personnel during routine maintenance shall be arranged or enclosed to provide protection against such injury Protective guards enclosures control rooms or similar means should be considered If such protective devices are not provided with the programmable control system suitable installation instructions warning labels or the equivalent shall be provided to clearly indicate the user s installation requirements 4 5 3 Enclosures for portable equipment Mechanical enclosures for portable equipment shall meet the general enclosure require ment of IEC 950 4 5 3 1 Protection against access to hazardous live or moving parts Portable equipment shall provide on all outer surfaces degree of protection IP2X against contact with hazardous live or moving parts according to IEC 529 This protection shall also be applicable with the service doors opened or covers of service openings removed Class Il portable equipment shalt in addition prevent contact with bare parts at hazardous voltages and be tested by the application of the test pin defined in figure 20 of IEC 950 to all openings in the enclosure Class Ill portable equipment only needs to be verified f
91. ion against electrical shock hazard ee ee ee ee 49 424 Class equipment 3 035 ac 559866550004 ibe l base e hae eke lees 49 4 2 2 Class Il equipment lt x 3 605354 ues Eno aS OY Be RE BEd OREO OS 49 4 2 3 Class Ill equipment and safety extra low voltage SELV circuits 50 4 3 Clearance and creepage distances requirements 0 00000 002 e eee 50 4 3 1 Clearances relating to normal overvoltage category 51 4 3 2 Clearances for micro environment where the voltages are known and COMM OUGG ra reesi nea cea ret kin Goria hin te ey gee attr e aa Geiah ss a a N 52 4 3 3 Creepage distances for basic and supplementary insulation 53 4 3 4 Creepage distances for reinforced insulation 0 00 58 4 4 Flammability requirements for insulating materials 0000 58 4 4 1 Non metallic materials Luua uaaa aaa eee 58 4 4 2 Temperature limits of materials 00 0000 ee 58 4 5 ENICIOSUIOSS purse ose 2 AS ei eae ee ee ee S Ce Frees R EE E E E 59 4 5 1 Evaluation of enclosures for open equipment power dissipation 59 4 5 2 Moving parts in non portable devices 0 0 0 00 eee eee 60 4 5 3 Enclosures for portable equipment 0 0 00 0 000000 08 60 4 6 Terminal connection mechanical requirements 0 0 00000 aeaa a 61 4 6 1 Constructional requirements 0 0 000000 cece eee 61 46 2 Conne
92. ions in 1 4 25 30 ISAEC 1131 2 1992 3 3 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 3 3 1 4 Information to be provided by the manufacturer In addition to the requirements of clause 5 the manufacturer shall provide the following information 1 volt ampere curve over the full operating range with tolerances or equivalent 2 digital input delay time TID for O to 1 and 1 to 0 transitions 3 existence of common points between channels 4 effect of incorrect input terminal connection 5 isolation potentials between channel and bus and between channels under normal service conditions 6 type of input type 1 or type 2 7 monitoring point and binary state of visual indicator 8 effects when withdrawing inserting input module under power 9 additional external load when interconnecting inputs and outputs if needed 10 explanation of signal evaluation for example static dynamic evaluation interrupt release etc 11 recommended cable and cord lengths depending on cable type and electro magnetic compatibility 12 terminal arrangements 13 typical example s of external connections 3 3 1 5 Method for determination of compatibility with proximity switches For a given proximity switch the following characteristics shall be identified i when at state 1 a Usrop maximum volt
93. its Binary BCD etc mV mA 3 4 2 2 2 Dynamic characteristics Units and examples ms ms of full scale of full scale Total output system transfer time TAQD TAQT 2 Settling time for full range change 3 Overshoot 4 Maximum temporary deviation during electrical noise tests and test conditions 3 4 2 2 3 General characteristics Units and examples 1 Type of protection Opto isolators etc 2 tsolation potentials under normal service conditions between channel and a bus b other channels c power supply ies interface s 3 External power supply data if required 4 For current outputs with external supply the maximum and minimum voltage drop across the output terminals in the full output range V Technical data V Type length of cable installation rules recommended to provide noise immunity 6 Calibration or verification to maintain rated accuracy 7 Terminal arrangements 8 Common points between channels if any Twisted pair 50 m max Months years Allowed type s of loads Floating grounded 10 Maximum capacitive load for voltage outputs pF 11 Maximum inductive load for current outputs mH 12 Typical example s of external connections 13 Output response at power up and power down 14 Effect of incorrect output terminal connection 3 4 2 2 4 Miscellaneous characteristics Units and examples Monotonicity Yes
94. l be connected to their interface with the rest of the basic PC system using the catalogued means or according to manufacturer s specifications Unless otherwise specified in this standard the manufacturer may elect either that each type test be performed on a new basic PC system or that several type tests be performed on the same basic PC system In any case each type test need not be performed more than once for a particular type of equipment 71 ISAEC 1131 2 1992 For a family of very similar modules i e modules using the same schematic and basic manufacturing and differing mainly by impedance adaptation and for type tests which shall be obviously not dependent on the differences between the modules the manu facturer may elect to include in the basic PC system only one arbitrarily chosen member of this family Test configurations more simple than the basic PC system may be used to verify unit module and overall PC system compliance when new units or modules are introduced to the marketplace after a modular programmable controller has been successfully tested according to this standard provided that these test configurations and the appropriate test programs provided by the manufacturer allow proper verification as if they had been tested within the originally tested basic PC system See figure 1 page 47 6 3 2 Verification procedure 6 3 2 1 General 1 Type tests shall be conducted on the basic PC system s defined i
95. ls employed in the enclosure shall comply with the flammability requirements of 4 4 1 rminal connection mechanical requirements o NOTE The applicability of the requirements of IEC 947 1 to this subclause is under consideration 4 6 1 Constructional requirements 1 Terminals shall be so designed that loose strands of wire shall not reduce the a am ae as e o ee eee tem required ciearance creepage requirements 2 All parts of terminals which maintain contact and carry current shall be of metal of APARAN mechanical strength eA T a py mar m meam n 3 Terminal connect means of screws springs or other equivalent means a fast on connection clamp type connection so as to ensure th pressure is maintained over the full range of service conditions 4 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 insulation shail not be reduced below the rated values ae m n a am e a m Pa o a a 5 The mechanical design of a inte i i y conductor is subjected to bending of a radius of curvature less than six times its diameter after removai of the common eiemenis ne mouring sheaths fiiiers 6 Clearances between wiring terminals and terminal to earthed parts are given in 4 3 1 2 4 6 2 Connecting capacity 4 6 2 1 General The wire sizing of the terminal shall be in accordance with local and or national electrical standards as
96. lso be used for type 1 applications 1 4 26 Insulation basic supplementary doubie reinforced 1 basic Insulation Insulation applied to live parts to provide basic protection against electric shock 2 supplementary insulation Independent insulation applied in addition to basic insulation in order to ensure protection against electric shock in the event of a failure of the basic insulation 3 double insulation Insulation comprising both basic insulation and supplementary insulation 4 reinforced Insulation Single insulation system applied to live parts which provides a degree of protection against electric shock equivalent to double insulation under the conditions specified in this standard NOTE The term insulation system does not imply that the insulation must be in one homogeneous piece It may comprise several layers which cannot be individually tested as supplementary or basic insulation 1 4 27 interface Shared boundary between a considered system and another system or between parts of a system through which information is conveyed See 3 1 1 4 28 isolated devices circuits Devices circuits with no galvanic connection between them 1 4 29 live part Any conductor or conductive part which is at a voltage in normal use IS IEC 1131 2 1992 1 4 30 mains power supply Power from the conductors mains of the permanent instal lation of the building at the supply voltage to the PC system 1 4 31 main
97. med Either test A or test B defined below Description of tests initial conditions Energy source fully charged external energy supply disconnected e temperature C Open equipment General conditions 55 C 6 3 3 Enciosed equipment 40 C e duration h 300 1 000 Verification after the tests According to PFVP 6 3 2 2 The PC system shali be fully operational No loss of retentive data is allowed 6 3 7 5 2 Verification of manufacturer s method of changing the energy source Table 53 Change of energy source test eteren ftom According to PFVP 6 3 2 2 Preconditioning According to manufacturer s specifications energy source may require time to be fully charged Replacement of energy source According to PFVP 6 3 2 2 The PC system shall be fully operational No loss of retentive information is allowed Verification after the tests ISMEC 1131 2 1992 6 3 7 5 3 Verification of other requirements 1 Check the required warning of low energy source voltage see 3 2 2 Remove the energy source and apply the proper controlled voltage in place of the energy source 2 If non rechargeable energy sources are used verify that design requirements of 4 11 are met 6 3 8 Verification of input output characteristics 6 3 8 1 General 1 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 t
98. ment de energized shall not make contact with any live part except for SELV circuits or any moving part except smooth rotating shafts 80 ISAEC 1131 2 1992 6 3 5 5 3 Verification of clearance distances at field wiring terminals Table 40 Verification of clearance distances at field wiring terminals Reference test Physical measurement Requirements references Subclauses 4 3 and 4 5 6 3 5 5 4 Verification of internal external wiring characteristics Integrity of internal external wiring This integrity shall be initially tested and then verified during the vibration tests specified in 6 3 5 1 and after the vibration shock and free fall tests specified in 6 3 5 1 6 3 5 2 and 6 3 5 3 Wire and cable flexing withstand test Requirement reference subclause 4 9 2 The flexing test applies to wiring subject to flexing under normal service conditions and 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 two extreme points of travel for the cable Number of flexing cycles e 500 if flexing under normal service conditions e 25 if flexing only during maintenance operations Pass fail criteria The wiring shall be considered acceptable if after this test e the PFVP 6 3 2 2 is performed successfully e the insulation passes the application of the dielectric test 6 3
99. ment references item 4 of 3 7 2 and item 5 of 3 7 2 This test verifies the effect on transfer time s introduced to provide remote input inform ation and RIOSs status to the application program and to transmit its logical decisions to remote outputs Procedure An application test program consisting of copying input status to outputs is run in four similar configurations 102 ISMEC 1131 2 1992 local inputs to local outputs remote inputs to local outputs local inputs to remote outputs remote inputs to remote outputs Pass fail criteria The total system response times and the subsequent variations of tanger time s shall conform to the manufacturer s published specifications 6 3 10 2 Loss of communication test Requirement references item 2 of 3 7 1 item 3 of 3 7 1 and item 6 of 3 7 2 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 signaled to the user T Procedure The test is performed by disconnecting a the tink b the RIOS external power supply and observing the behaviour of the basic PC system i e of the MPU as well as of the RIOS and of their outputs Pass fail criteria According to requirements 6 3 10 3 Verification of other requirements Type tests are not required all characteristics non tested shall be verifiable under a pro
100. ments of 3 10 Perform the test on three test PWBs the test voltage shall be applied between a their parallel printed conductors b these printed conductors and a test electrode that is put on the PWB Pass fail criteria There shall be no flashover or breakdown of the insulation 5 Adherence test cross cut adherence test Multi blade tool The cutting tool shall be as defined in figure 7 The distance between two blades shall depend on the thickness of the protective coating thickness in ym distance between blades a 5 thickness lt 60 1mm 60 lt thickness lt 120 2 mm Oe EE amme e ee AAE EEEE iniaecant eee ee ED E O EE i tt a LLU at O 4A AA The leading edges and all cutting edges shali have the same diameter aj amp Cutting direction t i 1 20 05 K cutting edges are worn more then 1mm re grinding is necessary IEC 960192 Dimensions in millimetres Figure 7 Multiblade tool with six blades 83 ISAEC 1131 2 1992 Handbrush The handbrush shall have 110 to 150 bundles of polyamide bristles each bristle shall be 12 mm to 15 mm tong and 0 4 mm to 0 5 mm thick Procedure The appropriate cutting too shall be used to draw two perpendicular cuts down to the basic material so that a grid of 25 squares results The cut shall be drawn smoothly not jerkily with a speed of 0 02 m s to 0
101. mounting support The basic PC system is placed on a wooden table in a shielded room in the far field generated by the radiated antenna Frequency range to be swept 27 MHz te 500 MHz Sweep speed 1 5 x 1073 decade s Test field strength 10 V m Measurement and verification during loading According to PFVP 6 3 2 2 Pass fail criteria There shall be no deviation other than manufacturer specified allowances for analog Os ISAEC 1131 2 1992 6 3 6 2 3 Fast transient burst test Table 45 Fast transient burst immunity test Subclause 3 9 1 According to manufacturer s specifications According to PFVP 6 3 2 2 Requirement reference Preconditioning initial measurements Details of mounting support The test equipment configuration shall be such as to eliminate the radiated EMI received on VO wiring by the specified capacitive coupling Severity level at rated voltage According to requirement in 3 9 1 e A ower supplies e B digital 1 Os Ua 2 24 V e C digital I Os Up lt 24 V analog 1 Os communication I Os 2 kV repetition frequency of spikes 2 5 kHz t 20 1 kV repetition frequency of spikes 5 kHz t20 250 V repetition frequency of spikes kHz 20 Duration 10 s minimum Application points methods eA e Bandc Positive and negative common mode Direct coupling by wired capacitance method Capacitive clamp method
102. n installation commission operation and maintenance of the PC system in addition the manufacturer may provide user training In this subclause only the general concept of the written information to be provided is stated The required informations to be given in each level of documentation as defined below is listed in various subclauses of all parts of this standard 5 2 Index of information to be provided The following table 29 lists all cross references to other areas where manufacturer s information is required 67 Table 29 Index Information to be provided se ND Go 2 Note 3 of 2 2 2 2 Equipment ambient temperature limits 2 1 1 3 Relative humidity 21 1 4 Pollution degree 2 1 1 5 Corrosion protection 2 1 2 2 Electrostatic discharge severity level 2 1 3 1 Vibrations 2 3 Special transport and storage conditions 2 3 6 Transport and storage Note 3 of 3 2 1 1 Sizing of a dedicated power source Note 5 of 3 2 1 1 Non standard power supplies 3 2 3 Power supply Item 4 of 3 3 Additional external load Item 5 of 3 3 A C inputs fed from several phases Note 2 of 3 3 Non standard digital I Os 3 3 1 4 Digital inputs 3 3 2 2 Protected non protected outputs 3 3 2 2 Short circuit proof outputs 3 3 2 3 A C digital outputs 3 3 3 3 D C digital outputs 3 4 1 2 Analog inputs 3 4 2 2 Analog outputs 3 5 2 Communication interfaces 3 6 3 MPU PC configuration 3 7
103. n 6 3 1 unless otherwise specified 2 For each test the manufacturer shall specify how this configuration shall be installed and externally connected provide the suitable test programs which shall be run during the test provide the proper operation verification procedure including the way to measure accuracy and temporary deviations of analog Os 3 The appropriate test programs and proper functioning verification procedures provided by the manufacturer shall satisfy the requirements given in 6 3 2 2 4 The adequacy of the test programs and proper functioning verification procedures shall be verified by the measurement of the coverage factors for modules units external 1 O wiring and removable connectors as required in item 7 of 6 3 2 2 6 3 2 2 Requirements for test programs and proper functioning verification procedures PFVPs to be provided by the manufacturer 1 During the type tests there shall be no destruction of hardware modification of the operating system and test programs and or alteration of their execution unintended modification of system and application data stored or exchanged erratic or unintended behaviour of the basic PC system deviation of the analog I Os out of the limits specified in item 5 of 3 4 1 2 2 and item 4 of 3 4 2 2 2 72 ISAEC 1131 2 1992 2 All relevant functions and paris of the basic PC system i e units and modules shall be functioning in such a
104. n is used throughout except for those parts where reinforced insulation is used ii equipment which is a combination of types i and ii NOTES 1 The insulated enciosure of a class I equipment may form a part of the whole of the supplementary insulation or of the reinforced insulation 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 3 class Il equipment may have parts operating at safety extra low voltage 3 class fll circuit or equipment Circuit or 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 1 4 17 equipment enclosed Equipment which is enclosed on all sides with the pos sible 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 1 4 18 equipment fixed Equipment which is part of the permanent installation 1 4 19 equipment hand held portable Equipment which is intended to be held in one hand while being operated with the other hand 1 4 20 equipment open Equipment which may have live electrical parts accessible e g a main
105. n table 17 below 46 IS IEC 1131 2 1992 Table 17 Dielectric withstand voltages for impulse a c power frequency and d c tests Rated voltage of circuit Ug Test voltages at 2 000 m rote 1 V a c r m s or V d c note 2 For basic and supple For reinforced insulation Impulse peak D C mentary insulation note 3 1 2 50 ps note 4 note 4 NOTES See annex D correction factor for testing at other altitudes Rated voltage at the field wiring terminals of the device or circuit Class ii and applicable class Hl circuits See 6 3 6 1 1 NOTE To recognize current practices the manufacturer may elect alternatively to verify the dielectric strength by the application of 2 U 1000 V a c for a minimum duration of 1 min 4 When subject to the dielectric test isolation between isolated SELV circuits and other non SELV circuits shall withstand the application during three cycles of 1500 V a c r m s voltage or its equivalent peak value i e 2 121 V for the impulse or d c voltage regardless of altitude NOTE Applicable national regulations shall be also considered for SELV circuits 5 When the assembly includes an equipotential conductor isolated from the access ible conductive parts it shall be regarded as an isolated circuit and shall be tested to the same voltage as the assembly to which it belongs 3 10 3 Information to be provided by the manufacturer In addition to the requirements of clause 5 the
106. n which I Os are processed i e use of I O image registers perio dically refreshed by the system immediate get put type instructions interrupt and event driven programs etc and their effect on the following subjects system response time s restart capabilities i e cold warm hot restart 10 detailed times for inputs outputs processing etc 11 effect of non permanently installed peripherals on every relevant time see item 8 above when they are prgecerupaaeer connected disconnected to their PC system interface 12 PC 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 13 test and diagnostic functions implemented see 3 11 3 7 Remote input output stations RIOSs RIOSs are part of the permanent PC installation and therefore to be tested accordingly However for ease of testing isolated RIOSs may be tested separately where appropriate 3 7 1 Requirements 1 Requirements for voltage drops and interruption of the power supply ies fully apply to RIOSs see 3 2 1 2 2 In case of loss of communication with the MPU application program RIOSs shall 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 3 The
107. nd tested NOTE Depending on the interpretation of basic PC system as defined in 6 3 1 the requirement of item 3 above may involve large amounts of equipment and highly complex procedures Therefore clarifi cation of this requirement is under consideration 6 3 3 General conditions for tests 1 The tests shall be carried out in accordance with the appropriate test procedure 2 The tests shall be carried out under the general test conditions given in table 30 below unless otherwise specified 3 Unless otherwise specified no sequence is imposed for type tests 4 Unless otherwise specified the conditions given in table 30 shalt apply Table 30 General conditions for tests Mains power supply Rated voltage and frequency Temperature 15 C to 35 C Relative humidity 45 to 75 Barometric pressure 860 kPa to 1 060 kPa 650 mm Hg to 800 mm Hg Output loads Outputs loaded to rated load Pollution Pollution degree 1 73 ISAEC 1131 2 1992 6 3 4 Climatic tests 6 3 4 1 General conditions 1 Tests are performed on unpackaged equipment 2 Temperature sensitive components that are normally serviced and removed by the user may be removed if so requested by the manufacturer 6 3 4 2 Ory heat and cold withstand tests Table 31 Dry heat and cold withstand tests O oo w Preconditioning According to manufacturer s specifications According to PFVP 6 3 2 2 Power supply unconnect
108. nection of open equipment shall comply with the requirements of 4 9 2 2 Cable assemblies and flexible cords provided for interconnection between sections of equipment or between units of a PC system shall be a type that is acceptable for the voltage and temperature invoived and shall be provided with suitable strain relief 3 Misalignment of plug and socket connectors insertion of a muiti 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 PC system or electric shock or injury to persons from the PC system 4 To prevent incorrect operation when making and breaking interconnections between nartinane af tha PC system either the connector socket shall be polarized to nrevent rv bI UIT ws at dws 4 en wywiw ee TETTE EV wav OF d a a vw WHS Fae Se We Ld prow y improper insertion or the PC system shall be designed so that no malfunction occurs or tha maniifsantiicar ehall naravnan alaar ine tine TILT IMALGVIMLU olidaii PUV YING WwIitcai lig when connecting or disconnecting atinne ta ha takan LIVET ILV MWU LOUIN Wt 5 Protective earthing conductor insulation shall be green with a yellow stripe 4 9 4 Internal and external wiring Connectors shali be positioned so that wires and cables need not be routed over operator devices and their identification 4 19 Plugging unplugging
109. no Crosstalk between channels at d c 50 Hz and 60 Hz dB Non linearity of full scale Repeatability at fixed temperature after specified stabilization time of full scale Output ripple of full scale 40 ISNEC 1131 2 1992 3 5 Communication interfaces 3 5 1 General requirements The configuration which shall be tested according to clause 6 of this standard shall be equipped with communication interface modules where applicable and with communication links specified by the manufacturer Communication interface modules are subject to all genera requirements relating to service conditions mechanical construction safety markings etc see in particular 2 1 3 8 3 9 and clause 4 3 5 2 Information to be provided by the manufacturer if the manufacturer provides communication interfaces to other than his own equipment he shall provide the necessary information for correct operation This information shall include but not be limited to type of link baud rates energization of the line type of cable to be used isolation characteristics protocols character encoding frame encoding etc 3 6 Main processing unit s and memory ies of the PC system NOTE This subclause should be read in conjunction with IEC 1131 1 and with 3 7 and 3 8 of this part respectively RIOSs and peripherals 3 6 1 General See figure 1 in 3 1 and annex A for the definition and illustration of PC system main processing unit MPU main mem
110. ntended mission Unless otherwise specified the basic PC system is not energized during the withstand test After a specified recovery period a proper function ing verification procedure is performed as specified to check visually and or by measurement that the test had no detrimental effect on the basic PC system NOTE The impact test see 6 3 5 5 1 is classified as withstand test though it may affect the operability of the basic PC system 1 4 53 unit For the purpose of this standard a unit is an integral assembly which may consist of modules plugged in or otherwise connected within the assembly and which is connected to other units within the system by means of cables for permanently installed units and cables or other means for portable units 14 ISAEC 1131 2 1992 1 4 54 wiring internal external 1 Internal wiring Wiring which is inside the open or enclosed PC system equipment 2 external wiring Wiring of the PC system equipment which is normally installed by the user 1 5 Normative references The following normative documents contain provisions which through reference in this text constitute provisions of this part of IEC 1131 At the time of publication the editions indicated were valid All documents are subject to revision and parties to agreements based on this part of IEC 1131 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below Membe
111. nterfaces 1 4 37 muiti channel module Module containing multiple input and or output user Signal interfaces A multi channel module may or may not be a multi circuit module 1 4 38 output not protected protected short circuit proof See 3 3 2 2 and 3 3 3 2 1 4 39 overvoltage category of a circuit or within an electrical system A conven tional number based on limiting or controlling the values of prospective transient overvoitages occurring in a circuit or within an electrical system having different nominal voltages and depending upon the means employed to influence the overvoitages NOTE In an electrical system the transition from one overvoltage category to another of lower category is obtained through appropriate means complying with interface requirements such as 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 overvoltage category 1 4 40 PC system Synonymous with programmable controller system as defined in 2 5 1 of IEC 1131 1 see annex A of IEC 1131 1 and annex A of this part 12 ISMEC 1131 2 1992 1 4 41 permanent Installation See annex A of IEC 1131 1 or annex A of this part 1 4 42 pollution degree in the micro environment For the purpose of evaluating clearances and creepage distances the following three degrees of
112. ocedure shall simulate on line making breaking of the physical peripheral connection to the PC system When permanently installed peripherals shall be placed in their monitor mode or equivalent There is no requirement for simulation of operator s keying 2 Tests are performed on operated peripherals providing stand alone functions such as off line docu mentation programming compiling editing duplicating memory storages etc 3 Analog I Os and fast responding digital inputs may be affected temporarily during the disturbance but shall resume normal operation after the disturbance and shall stay within the manufacturer s specified limits see item of 3 4 1 2 2 and item 4 of 3 4 2 2 2 4 Electrostatic discharges are applicable to all accessible conductive parts and insulating surfaces of the PC system normally accessible to the operator such as switches keyboards module external packaging shielding part of connectors etc and to the protective and or functional earth terminals but not to the signal lines Revision of these requirements is under consideration pending availability of IEC 801 5 3 9 2 Information to be provided by the manufacturer The manufacturer shall state if his peripherals are intended to be used under normal service conditions or solely in a less severe environment e g office environment 3 9 3 Emitted noise Due to differing national regulations emission levels cannot be specified Equipment shall m
113. of removable units A Am ada ilar ant ot an wes amd ion af Bf nmin nnn n 1 Modular construction of PC equipment shou PC system when inserting or removing modules Modulos of the Same ype and accordingiy marked shaii be interchange whe setting of parameters such as address thresho may be required prior to using the new module in the intended operation EF 2 All units requiring plugging or unplugging during operation or maintenance shall withstand the number of insertions and withdrawals given in tabie 28 without adverse effect on their contact making effectiveness TIV WVL wt brv w eruv ps I w war w we we 64 ISAEC 1131 2 1992 Tabie 28 Insertion withdrawal of removable units minimum number of cycles Permanently Non permanently installed units installed units Plug in type 50 500 Type with removable terminal blocks 20 500 4 11 Battery requirements 4 11 1 General accumulation of 4 11 2 Non rechargeable batteries 1 Non rechargeable batteries e g lithium if used shall be provided with suitable protection finternal to the battery cell or external components SO as to minimize the wr ww TE aF w risk of battery explosion Parameters to be considered in the Aasign should include tem peratu rA reverse current finas ul ature UYUI Whst Gis ayy battery charging 2 Means shall be provided to prevent inadvertent charging and to limit the discharge current of non rechargeable batte
114. ollowing information as a minimum 1 Protective earthing requirements and recommendations concerning personnel safety circuits 3 2 Suggested requirements to the user for the maintenance of protective devices such as protective earthing circuits overcurrent protective devices and batteries utilized for memory back up etc 3 If the PC system is provided as open equipment the type of enclosure required to provide the required level of safety and environmental protection and guidelines for mounting spacing and or internal barriers or shields if needed for safety 4 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 6 Tests and verifications 6 1 General The object of this clause is to define how to verify compliance of the programmable control ler and the associated peripherals with the requirements set forth in parts 1 and 2 of this standard This compliance verification includes verification by type tests given in 6 3 verification by suitable examination visual inspection or and measurement These tests are qualification tests and not tests related to the ways PCs are applied according to the scope of this standard the above compliance verification may not cover the verification of the ability of the PC system to satisfy the intended automated system requirements where needed special tests
115. oo h Oo Oo OO OO Oo oe k 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 Watt bl afa St BT Aare Tat Bl BIS TT Hh ACH Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru The Right to Information The Right to Live Step Out From the Old to the New Meester li 3i 2 1992 Programmable Controllers Partii Equipment Requirements and Tests ETD 18 Industrial Process Measurement and Control Satyanarayan Gangaram Pitroda Bhartrhari Nitisatakam oo OO kkk oo kkk BLANK PAGE PROTECTED BY COPYRIGHT IS IEC 1131 2 1882 arata ITAS Reaffirmed 2003 Mana Ma Aiak qm 2 qer dae wierd ale ria indian Standard PROGRAMMABLE CONTROLLERS PART 2 EQUIPMENT REQUIREMENTS AND TESTS ICS 275 040 40 BIS 1935 BUREAU OF INDIAN STANDARDS MANAK BHAVAN 9 BAHADUR SHAH
116. or 180 Hz adjusted to 10 of the mains rated voltage is added to the a c mains power supply with 0 and 180 see figure 10 Test duration for each phase 5 min Measurement and verification during loading According to PFVP 6 3 2 2 Verification after tests According to PFVP 6 3 2 2 _ If there are separate mains supplies to the PC system the tests may be done on each supply separately Third harmonic generator _ wee 4 PC system Power supply source IEC 963192 Figure 10 Third harmonic immunity test 92 ISAEC 1131 2 1992 6 3 7 2 External energy supply interruption tests 6 3 7 2 1 Momentary interruption immunity test Table 49 Momentary external energy supply interruption immunity test retermcotest fame Requirement reference Subclause 3 2 1 2 Preconditioning According to manufacturer s specifications According to PFVP 6 3 2 2 initial measurements Supply voltage and frequency Rated values Test description A C supply interruption e duration base 0 5 period starting at zero crossing notes 1 and 2 20 1 time interval lt 10s e number of trials e time interval between trials D C supply interruption duration PS1 1 ms PS2 10 ms note 2 number of trials 20 e time interval between trials 1s lt time interval lt 10 s According to PFVP 6 3 2 2 Normal operation shall be main
117. or protection against contact with moving parts since SELV is not hazardous 4 5 3 2 Shafts and knobs 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 operation the insulation provided shall be such that the shafts and knobs do not become live in the event of an insulation fault 4 5 3 3 Plug connections Portable equipment connected to the mains power supply by use of a cordset removable or fixed shall be so designed that there is no risk of electric shock from charged capa citors when touching the pins of the plug and or receptacle 4 5 3 4 Accessibility of live parts through their supporting surfaces Portable equipment shall be constructed so that all live parts shali be at a distance of at least 6 mm from any openings measured vertically in their supporting surfaces 60 ISAEC 1131 2 1992 4 5 3 5 Stability Equipment shall be constructed o that it operates in all positions to be expected in normal operation and does not become unstable when tipped in any direction 15 from the in tended operating position 4 5 3 6 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 shall be verified after the applica tion of the standard IEC impact test see 4 2 4 of IEC 950 4 5 3 7 Flammability Non metallic materia
118. ord and swings as a pendulum droopina throuch a vertical distance H of 1 300 mm to the miw Tw wt ey Ft as wuss jw Sw 8 UT Sw we w wv w sphere impact position J ISNEC 1131 2 1992 Note H 1300 mm For the ball pendulum impact test the sphere is to contact Sphere start the test sample when the position od Sphere impact position a eee ET es t cord is in the vertical position as shown Sphere start position Sphere impact N position ee laa JEC 959 92 Figure 6 Impact withstand test procedure 6 3 5 5 2 Accessibility tests Table 39 Accessibility tests Reference tests e Class equipment e Class Il equipment Selection of sample s Number of samples Preconditioning Detatis of mounting support Drain ventilation holes Moving parts test Electrical shock test Test description ment The finger 1P2X and where applicable the test pin For open equipment no test is required and the user is responsible for the safety of the equip IEC 529 IEC 950 subclause 2 1 tast pin of figure 20 Class and Class Ii enclosed equipment and enclosed equipment containing moving parts One equipment of each type Clean and new According to manufacturer s specifications Configuration used in operating conditions Equipment energized and operating Equip
119. orst case at state 0 and a given input impedance curve curve Iil 28 ISNEC 1131 2 1992 ON REGION Faa Curve II 1 yee INPUT impedance state 1 i Curve I Proximity switch worst case at state 1 A lt Curve II 1 IN mpedance state 0 A E Ae Curel Proximity switch worst case at state 0 OFF REGION 1 amp C 956192 UH max and UH min are the voltage limits for the ON conditions state 1 IH max and UH min are the current limits for the ON conditions state 1 UT max and UT min are the voltage limits for the transition state ON or OFF T max and IT min are the current limits for the transition state ON or OFF UL max and UL min are the voltage limits for the OFF conditions state 0 IL max and IL min are the current limits for the OFF conditions state 0 UL max equals UL min to T min and equals UT min above IT min _ Uo Uo max and Uo min are the rated voltage and its limits for the external power supply voltage 1 I fH a b c A B relate to the example described in 3 3 1 5 Figure 3 U I operation regions of current sinking inputs 3 3 1 2 Standard operating ranges for digital inputs current sinking Current sinking digital inputs shall operate within the limits presented in the following table 9 29 ISNEC 1131 2 1992 Table 9 Standard operating ranges for digital inputs current sinking ND Not defined Type 1
120. ory and other terms used in this subclause 3 6 2 Requirements Main processing unit s and memory ies are part of the permanent PC installation and therefore tested accordingly They are subject to all general requirements relating to service conditions mechanical construction safety markings etc see in particuiar 2 1 3 8 3 9 3 11 and clause 4 3 6 3 Information to be provided by the manufacturer 1 organization capacity of program memory 2 organization capacity of data memory and number of bits per word 3 memory type s i e CMOS EPROM etc available 4 memory back up functionality and service requirements if any 5 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 6 description of the programming languages supported by the PC system combina tion of the PADT and the main processing unit s 7 to what extent the languages defined in IEC 1131 3 are supported including the differences if any objects instructions semantic and syntactic rules etc 41 ISNEC 1131 2 1992 8 calculation methods to determine every memory utilization user s application program and date firmware program and data where applicable and average minimum and maximum value of every relevant time scan time s system response time s transfer time s execution time s 9 mechanisms i
121. ot be large enough to pass this test therefore in that case it is recommended to refer to IEC 664 for designing the PC system and to adapt subsequently the values of the dielectric type test see 6 3 6 1 1 where applicable Table 56 Alternative routine a c and d c dielectric strength withstand test Selection of sample s e SELV circuits No test 0 lt Uo lt 50 Sample testing according to manufacturer s instructions e 50 lt U All units shall be tested Test methods and application points As cpecified in 6 3 6 1 1 note 1 Dielectric test duration it is the option of the manufacturer to perform the 1 s or 1 min test ae Test voltages and durations nate 2 Rated voltage Uo l A C voltage r m s D C voltage V V V note 3 Ua lt 50 500 600 700 850 50 lt U lt 600 1 000 2 U 1 2 x 1 414 x 1 414 x 1 2 x 1 000 2 U 1 000 2 U 1 000 2 U Pass fail criteria There shall be no unintentional flashover or breakdown of the insulation during the test Eventual operation of the protecting devices provided on the units shali not be considered as a failure NOTES 1 When the assembly includes an equipotential conductor isolated from the accessible exposed conductive parts it shall be regarded as an isolated circuit and shall be tested to the same voltage as the assembly to which it belongs 2 Regardless of altitude 3 Rated voltage at the field wiring terminals of the device or circuit
122. perating at the most adverse combination of normal service conditions can supply without any part of it insulation terminals exposed conductive parts etc exceed ing 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 1 4 52 test routine type immunity type withstand type 1 routine test Test to which each individual catalogued device is subjected during or after its manufacturing process to ascertain whether it complies with certain criteria 2 type test Laboratory test to which one or severa basic PC systems or samples of catalogued devices is are subjected to ascertain that its their design s meet require ments expressed in this standard 3 immunity type test immunity test Type test verifying that the basic PC system operation is not altered by the application of specified influencing quantities which are intended to approximate normal service conditions During the test the basic PC system executes appropriate test programs to be pro vided by the manufacturer see 6 3 2 2 NOTE Some tests may allow temporary alteration of the basic PC system operation within limits that must be then specified by the manufacturer 4 withstand type test withstand test Type test verifying that the application of more severe influencing quantities to the basic PC system does not impair its ability to assume its i
123. poliution in the micro environment are established 1 poilution degree 1 No pollution or only dry non conductive pollution occurs The pollution has no influence 2 pollution degree 2 Normally only non conductive pollution occurs Occasionally however a temporary conductivity caused by condensation shall be expected 3 pollution degree 3 Conductive pollution occurs or dry non conductive pollution occurs which becomes conductive due to condensation which is expected NOTES 1 The conductivity of a polluted insulation is due to the deposition of foreign matter and moisture 2 The minimum clearances given for pollution degrees 2 and 3 are based on experience rather than on fundamental data 1 4 43 protective earthing conductor terminal connection See earth protective 1 4 14 1 4 44 rated supply voltage Mains voltage for three phase supply the line to line voltage for which the manufacturer has designed the apparatus 1 4 45 recurring peak voltage Peak value of a generated voltage whose characteristic is recurring at some specified period Such recurring peak voltages are generally generated in switch mode power supply circuits a c or d c to d c converters See 4 3 3 2 1 4 46 removabie connector Connecting means intended to be used for operation or maintenance servicing of the PC system by the user Pluggable modules peripherals etc are generally connected to the rest of the PC system by such means 1 4
124. processing unit An open equipment is to be INCOIPOTaNSY into other assemblies manufactured to provide safety 10 ISMEC 1131 2 1992 1 4 21 equipment on line pluggable Equipment which can be plugged or unplugged from the PC system at any time including when the PC system is operating without disturbing or disrupting the normal operation of the PC system and without any increased risk to the operator and the application 1 4 22 equipment portable Enclosed equipment which is intended to be transported by hand carrying such as programming and debugging tools PADTs and test equipment TE 1 4 23 hazardous voltage Voltage exceeding 42 4 V peak or d c existing in a circuit which does not meet the requirement for a limited energy circuit 1 4 24 Immunity Ability of the PC system to be unaffected or to maintain its operation within limits specified by the manufacturer when submitted to influencing quantities specified in this standard 1 4 25 input digital type 1 type 2 type 1 digital Input type 2 digital input 1 type 1 digital input Digital input for sensing signals from mechanical contact switching devices such as relay contacts pushbuttons switches etc type 1 digital inputs may not be suitable for use with solid state devices such as sensors proximity switches etc 2 type 2 digital input Digital input for sensing signals from solid state switching devices such as 2 wire proximity switches This class could a
125. processing unit MPU The portion of the PC system which interprets or executes the main part of the application program The MPU may inciude power supply memory and I Os See annex B of IEC 1131 1 and 3 1 3 6 and annex A of this part 1 4 32 man machine interface MMI Manufacturer s catalogued peripheral equipped with pushbuttons lamps keyboards displays or equivalent intended as operator inter face such as motor control monitor panel general purpose operator interface etc MMIs may be part of the permanent installation e g mounted on front panels doors boards etc or not 1 4 33 material group Classification of insulating materials in terms of comparative tracking index CTI range see 4 3 3 1 4 34 micro environment Ambient conditions which surround the clearance or creepage distance under consideration 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 includes all factors influencing the insulation such as climatic electro magnetic pollution etc See IEC 664 for further information 1 435 module Device such as an 1 0 board assembly which plugs into a back plane Or base 1 4 36 multi circult module Module containing multiple isolated circuits With respect to I O modules a module containing multiple isolated user signal i
126. r 50 m max Month years Yes no dB of full scale of full scale Number of cycles of hours ISNEC 1131 2 1992 3 4 2 Analog outputs 3 4 2 1 Rated values and impedance limits Rated values of signals range and load impedance for analog outputs of PCs shall be as i specified in the following table 14 Table 14 Rated values and impedance limits for analog outputs ignal range ad impedance limits Notes 10V 10 V OVHIOV 210002 1 41V 5V 25002 1 4mA 20 mA 600 Q 2 OmA 20 mA lt 600 2 Ba NOTES 1 Voitage analog outputs shail withstand any overioad down to short circuit 2 Current analog outputs shall withstand any overload up to open circuit l 3 Notrecommended for future designs 3 4 2 2 Information to be provided by the manufacturer In addition to the requirements of clause 5 the manufacturer shall provide the following information Ca O a E a en ee a Ee ISAEC 1131 2 1992 Table 15 Analog outputs information to be provided 3 4 2 2 1 Static characteristics Units and examples Output impedance in signal range 2 Analog output error Maximum error at 25 C temperature coefficient 3 Maximum error over full temperature range 4 Digital resolution 5 Data format in application program Value of LSB least significant bit Q of full scale of full scale K of full scale Number of b
127. r notes 1 2 3 4 and 5 see table 16 in 3 9 1 200 Q 109 ISAEC 1131 2 1992 Annex D normative Correction factors for test voltages Table D 1 Correction factors for test voltages corresponding to barometric pressure or altitude Altitude of test Barometric pressure Correction multiplication factor for test voltage m kPa note NOTE At a given altitude corrections for normal variations in barometric pressure are disregarded 110 ISAEC 1131 2 1992 Annex E informative Testing of protected outputs The following alternative method is under consideration for testing of protected outputs in addition to the method given in 6 3 8 3 2 in the case of protected outputs tests A B C D and E may be replaced by the following method Test procedure First series at Tmin e Search and measurement of the threshold of the protective function while causing the output load to vary slowly by using a variable resistor e then submitting the protective function to two tests of 5 min each during which the protected output is loaded respectively at 1 1 I prospective current and at 0 97 p Second series at T max e Same as first series but at T max Measurement and verification As specified in 6 3 8 3 2 111 Tern Ti Atel Wien aol 7 ARM a ET a a i Th eel of i Whi Tks EI l paa J ths f A gip ERT ri aT Wilt f
128. range 50 to 95 5 to 95 NOTES 1 Non condensing 2 See 2 1 2 2 for electrostatic discharge requirements 2 1 1 4 Pollution degree The manufacturer shall specify the pollution degree for which the equipment is suitable 2 1 1 5 Corrosion immunity Corrosion conditions vary widely depending on the application and it is not possible to specify normal conditions of use in case of severe service conditions see 2 2 The manufacturer shall specify the corrosion immunity of the equipment according to IEC 68 2 1 1 6 Altitude The equipment shall be suitable for operation up to 2 000 m 2 1 2 Electrical service conditions and requirements 2 1 2 1 A C and d c mains power supply Refer to 3 2 2 1 2 2 Electrical noise conditions Electrical noise conditions vary widely and depend on the installation wiring and other installed equipment and its proximity to the PC system For the purpose of this standard the minimum noise conditions to which the PC system shali be immune are indirectly expressed by the requirements given in 3 9 1 18 SAEC 1131 2 1992 For electrostatic discharge ESD the manufacturer may select one of the severity levels of the following table 3 Refer to IEC 801 2 for description of classes af installation Table 3 Electrostatic discharge service conditions ESD severity fevels coordinated with relative humidity seventy levels note Class of installation acce
129. rding to EC 801 2 Level RH 1 Level RH 2 Level ESO 3 Leve ESD 4 NOTE See table 2 for definition of relative humidity severity levels 2 1 2 3 Overvoltage category Control of transient overvaltages The nature of the installation shall be such that overvoltage category II conditions shalf not be exceeded Transient overvolttages at the point of connection to the mains power supply shall be controlied not to exceed overvoltage category H i e not higher than the impulse voltage corresponding to the rated voltage for basic insulation The equipment or the transient suppression means shail be capable of absorbing the energy in the transient See 3 40 2 2 4 2 4 Non periodic overvoltages in the industrial environment non periodic overvoltage peaks may appear on mains power supply lines as a result of power interruptions to high energy equipment e g blown fuse on one branch in a 3 phase system This will cause high current pulses at relatively low voltage levels approximately 2 x Usak The user shalt take the necessary steps to prevent damage to the PC system e g by interposing a transformer See IEC 4131 4 for additional information 2 1 3 Mechanica service conditions and requirements Vibration shock and tree 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 define
130. ries 4 11 3 Memory back up Memory back up requirements are expressed in 3 2 2 4 12 Markings and identification 442 1 General marking requirements Each PC unit shall be marked in a clear and legible manner as follows 1 manufacturer s name or trademark symbol 2 mode number or name v w 3 software seria number and or revision level see item 6 of 6 2 where applicable 4 hardware serial number and or revision level see item 6 of 6 2 equivalent and date 5 fuse replacement information if applicable 6 power rating information in volts amperes and or voltamperes and frequency and ewe we polarity where connection to the mains power supply occurs 7 equipment ciass designation if applicable ISNHEC 1131 2 1992 VO modules shall be marked with their 1 rated voltage and current as applicable 2 function identifier Live parts protective earth terminals and functional earth terminals markings shall be as required in 4 12 2 4 12 2 General identification requirements 4 12 2 1 Functional identifications 1 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 2 All operator s switches indicator lamps and connectors shall be identified or have provisions for identification 4 12 2 2 Module location and module identifications Space shall be es for i
131. ristics Total input system transfer time TAID TAIT Sample duration time including settling time Sample repetition time input filter characteristics order transition frequency Maximum temporary deviation during each specified electrical noise test Conversion method Operating modes Type of protection Isolation potentials under normal service conditions between channel and a bus b other channels c power supply ies interface s External power supply data if required Common points between channels if any Type length of cable installation rules recommended to provide noise immunity Calibration or verification to maintain rated accuracy Terminal arrangements 10 Typical example s of external connections 11 Effect of incorrect input terminal connection Monotonicity with no missing codes Crosstalk between channels atd c 50 Hz and 60 Hz Non linearity Repeatability at fixed temperature after specified stabilization time Life time of electromagnetic relay multiplexors if applicable 38 J K T etc Pt 100 etc of full scale of full scale K of full scale Number of bits Binary BCD etc mV mA V m e g flag e g differential CMRR dB CMV V Min C to Max C internal or user provided Units and examples First second etc Hz of full scale Dual slope S A etc Trig self scan etc RC opto isolator MOVs etc V Technical data Twisted pai
132. rogram control of the machine process may be interrupted during ms etc as applicable 43 ISIEC 1131 2 1992 the peripheral shall ask similar meaning words to do you really want to carry out this action and execute the command only after a positive reply has been given by the operator it shall be possible to upioad the new application program to the manufacturer s supplied data media and verify on line that the record is functionally equivalent to it means shall be provided to minimize unauthorized use of these functionalities hardware or software 3 8 2 Information to be provided by the manufacturer 1 Clear warnings and precautions to be observed when using functions enabling alteration of control conditions such as PC system status modification changing of data _ or programs in the memory forcing input or output signal etc 2 Usability of peripherals at RIOSs 3 Service conditions for peripherals which are intended for use in an environment less severe than stated in clause 2 such peripherals may need to be remotely connected to the rest of the PC system through communication lines 3 9 Noise immunity and emitted noise 3 9 1 Electrical noise immunity requirements As receiving equipment PC systems are affected by interferences from conducted noise radiated electromagnetic fields and electrostatic discharges General rules of installation which shall be followed to limit coupling factors
133. rs of IEC and ISO maintain registers of currently valid International Standards JEC 38 1983 JEC standard voltages IEC 50 151 1978 International Electrotechnical Vocabulary Chapter 151 Electrical and magnetic devices IEC 50 441 1984 Internationa Electrotechnical Vocabulary Chapter 441 Switchgear controlgear and fuses IEC 60 1 1989 High voltage test techniques Part 1 General definitions and test requirements IEC 68 2 1 1990 Environmental testing Part 2 Tests Tests A Cold IEC 68 2 2 1974 Environmental testing Part 2 Tests Tests B Dry heat IEC 68 2 3 1969 Environmental testing Part 2 Tests Test Ca Damp heat steady State IEC 68 2 6 1982 Environmental testing Part 2 Tests Test Fc and guidance Vibration sinusoidal IEC 68 2 14 1984 Environmental testing Part 2 Tests Test N Change of tempe rature IEC 68 2 27 1987 Environmental testing Part 2 Tests Test Ea and guidance Shock IEC 68 2 30 1980 Environmental testing Part 2 Tests Test Db and guidance Damp heat cyclic 12 12 hour cycle IEC 68 2 31 1969 Environmental testing Part 2 Tests Test Ec Drop and topple eee for ie type specimens 15 ISHEC 1131 2 1992 IEC 68 2 32 1975 Environmental testing Part 2 Tests Test Ed Free fall IEC 85 1984 Thermal evaluation and classification of electrical insulation IEC 112 1979 Method for
134. s are externally energized by an independent power supply i e independent from the other 1 O modules power supply ies of the basic PC 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 6 3 2 2 6 3 8 4 5 Reversal of signal polarity test withstand test Requirement reference item 11 of 3 4 1 2 3 If the 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 analog inputs shall be applied for 10 s Verification 3 The results shall be as stated by the manufacturer The device shall pass the PFVP see 6 3 2 2 Protection devices such as fuses may be reset prior to verification 6 3 8 4 6 Verification of other requirements Type tests are not required all characteristics non tested shall be verifiable under a proce dure to be agreed upon by the manufacturer and the user 6 3 9 Verification of MPU characteristics Requirement reference subcilause 3 6 Type tests are not required all characteristics non tested shall be verifiable under a proce dure to be agreed upon by the manufacturer and the user 6 3 10 Verification of remote I O stations 6 3 10 1 Response time test Require
135. saya subd OS a eae cee eK ECAR A Ge SO oS Sea wos oe 22 Electrical requirements i y 3 0 24295 4 044 e ebedie 25 G44 oeiw dd eee EE 22 3 1 Geneak erered ae Gey ee ovina as Sle Ghote eens a een ae oe Sn Se Ge es 22 3 2 A C and d c power supply 0 0 0 0 0 0 00 0c eae 24 3 2 1 Incoming power supply 0 00 0 ccc eee 24 See MEMOMDACK UD sina ns gore eo ee nee etek eee ee eee 25 3 2 3 Information to be provided by the manufacturer SEE ttn Ce ae 26 a3 IANA OS erra CA oh ce a A he GN id to eR A a ee aye eer 3 3 1 Digital inputs current sinking aio bul ee lek ieee 28 3 3 2 Current sourcing digital outputs for alternating currents 32 3 3 3 Current sourcing digital outputs for direct current 000 00 0 35 3 4 Ana OS enteh bere eye eed oe eek ne ee ee ar Oe es ae ae Ee 37 Ol ANalog MPS serrera E Se ld dk OS BR PR eee Sete 37 OS AAI OULPUS ics cass eau ed ecard ica ee RRR ee eee we haa aie 39 3 5 Communication interfaces 0 0 eee eee 41 3 5 1 Generalrequirements 0 0 0 0000 ccc cee eee ee 41 3 5 2 Information to be provided by the manufacturer 41 3 6 Main processing unit s and memory ies of the PC system 41 SO GENA aakri sd cad een eta aa Oe ee ed Sade roe 41 302 CQUIRGINGINS seu aer a e r e bed Erie de mee E Gaus p A 41 3 6 3 Information to be provided by the manufacturer 0 41 3 7 Remote inpu
136. sulation shall be arranged around the wiring for SELV circuits or around the wiring of other circuits 4 3 Clearance and creepage distances requirements 1 The extent to which the manufacturing process can control the mechanical toler ance decides the limits to which practical clearance and creepage distances can approach the theoretical minimum values given in the tables 18 to 24 of 4 3 itis 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 effected in service shops or in normal use e g fuses are considered to be part of controlled conditions Routine maintenance schedules for testing or examining insulation are expected Increased clearances are required when the equipment is field mounted and fieid connected because the method of mounting and the method of wiring at the field wiring terminals have to be considered In all cases the values given shall be met or exceeded 2 The actual clearance and creepage distances requirements will be based on the highest voltage and micro environment specified by the manufacturer for each circuit 3 In place of the requirements for clearances and creepage distances expressed in 4 3 1 1 4 3 2 and 4 3 3 the values in the ch
137. t output characteristics 020005 98 6 3 9 Verification of MPU characteristics PORE TEAT eee eee 102 6 3 10 Verification of remote I O stations 0 0 00 00 000 eee 102 6 3 11 Verification of peripheral characteristics 0 0 0 0 000002 cee eee 103 6 3 12 Verification of basic PC system self tests and diagnostics 103 6 3 13 Verification of markings and manufacturer s documentation 103 6 4 FROUUINGIOSNS eorr y at ees eka ghee the Siw aah 8S ad ue ae oD eae aad 104 6 4 1 Dielectric strength tests 0000 000 0 eee 104 6 4 2 Protective earthing continuity test withstand test 106 ANNEXES illustration of PC system hardware definitions 0 0 0 0 00000 eee 107 Input table equations 2 0 0 eee eee nets 108 Recommended higher immunity levels for electrical noise tests 0008 109 Correction factors for test voltages 0 0 0 0 2 00 eee as cites a 110 Testing of protected outputs 0 00 ee Peer ey eee cre 111 moo P As in the Original Standard this Page is Intentionally Left Blank ISAEC 1131 2 1992 Indian Standard PROGRAMMABLE CONTROLLERS PART 2 EQUIPMENT REQUIREMENTS AND TESTS NATIONAL FOREWORD This Indian Standard which is identical to IEC Publication 1131 2 1992 issued by the International Electrotechnical Commission IEC was adopted by the Bureau of Indian Standards on the recommen
138. t output stations RIOSs 2 0 a 42 3 7 1 Requirements 2 2 2 6 00 e eee erect wees erana 42 3 7 2 Information to be provided by the manufacturer 00 0 000 42 1 IS IEC 1131 2 1992 3 8 Peripherals PADTs TEs MMIs 00005 E senses 43 3 8 1 Requirements aa aae A ot eee A E he Ro O n 43 3 8 2 Information to be provided by the manufacturer 44 3 9 Noise immunity and emitted noise Sn Bie saci tv lev Pear ee aes ta Res EAT 44 3 9 1 Electrical noise immunity requirements 0 0 00 02000 44 3 9 2 Infortnation to be provided by the manufacturer 0 0005 45 3 9 3 Emittednoise ria Weaker ee er ere ry 45 3 10 Dielectric propeniGS 00 oc sided eee ae bak eh i ade A AA ee eee 46 Sid GENEA aout er te ett Bia ee re hae wile ata ee ean ee gee eaten a ees 46 3 10 2 Dielectric withstand requirements 00 0 00000 cece eee 46 3 10 3 information to be provided by the manufacturer 0 00 47 3 11 Self tests and diagnostics 0 0 00 00 0000 eee eens 48 SAI G noral essers bd ted ud ed oe eG ies ee eG we a es 48 Selle TACOUINCIMCING ss dent ao Sec ote aae ea Moe e ROSA EG oh aah An 48 3 11 3 Information to be provided by the manufacturer 48 4 Mechanical requirements 0 0 0000 cece cece eeee PNPN E E FEP 48 4 1 CONSA crite er aa r reee aa a aae bee sale Poke a 48 4 2 Protect
139. tained note 3 According to PFVP 6 3 2 2 Measurement and verification during loading Verification after the tests NOTES 1 Optionally the manufacturer may elect to interrupt the 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 normal operation after the disturbance 6 3 7 2 2 Shut down test sudden supply interruption Requirement reference Item 2 of 3 2 1 2 Test description During shut down due to the supply interruption the system behaviour shall be observed The test is repeated twice Pass fail criteria The requirement given above shall be met in addition from the start of interruption to shut down there shail be no change not caused by the normal test program and no erratic or unintended condition of any kind 93 ISNEC 1131 2 1992 6 3 7 2 3 Start up test voltage applied normally When the external supply is applied for a time specified by the manufacturer the PC 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 7 3 External energy supply variation tests immunity tests 6 3 7 3 1 General Reference requirements subclause 3 2 1 2 At voltages below the minimum normal servic
140. tion devices such as fuses may be reset prior to verification 6 3 8 3 4 Verification of other requirements Verify that general requirements for digital I Os under 3 3 and the remaining requirements Crear mm _ if of 3 3 2 2 are met output indicators and eiectromechanical relay outputs 6 3 8 4 Verification of analog I Os 6 3 8 4 1 Operating range tests Requirement reference subclause 3 4 1 1 Verify that all requirements are met Test procedures Under consideration 6 3 8 4 2 Overload withstand test for analog inputs Requirement reference item 7 of 3 4 1 2 1 Test procedure Under consideration Measurement and verification During loading During the application of specified maximal overioad no physical damage or abnormal phenomenon smoking smelling overheating 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 6 3 2 2 6 3 8 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 abdnormai phenomenon smoking smelling overheating shall be detected After the test perform the proper functional verification procedure of O J E 101 ISAEC 1131 2 1992 6 3 8 4 4 Voltage supply variation test This test shall be performed when the analog I O module
141. trical noise immunity and error detecting of the PC system operation such as the use of parity checking self testing diagnostics etc are addressed 1 2 Object of the standard The purposes of this standard are to establish the definitions and identify the principal characteristics relevant to the selection and application of programmable controllers and their associated peripherals to specify the minimum requirements for the functional characteristics service conditions construction characteristics general safety and tests applicable to program mabie controllers and the associated peripherals to define for each of the most commonly used programming languages major field of application syntactic and semantic rules simple but complete basic sets of program ming elements applicable tests and means by which manufacturers may expand or adapt those basic sets to their own programmable controller implementations to give general tutorial information and application guidelines to the user ISAEC 1131 2 1992 eal imami mm RMAs Aa s a g a ee lb and e ma ine the communication between programmabie controllers and other electronic i t d he Manufacturing Message Specification MMS 1 3 Object of this part This part specifies the electrical mechanical and functional requirements for programmable control lers and the associated peripherals and the service storage and transportation conditions that apply
142. unting support None According to PFVP 6 3 2 2 Measurement and verification during loading Verification after the test 78 ISAEC 1131 2 1992 6 3 5 5 Safety related tests 6 3 5 5 1 Impact withstand test type test associated with transport and etarana roanstitinne wiw wi tag SOF Fue dhat ad boah a a E Reference test IEC 950 Requirement reference Subclause 4 5 3 6 Selection of sample s Enclosed equipment with voltage greater than SELV and eauloment co containing movina narte yr ald LE S 3 as gg r aq Exceptions Test performed neither on hand held portable equipment mee Fh h hes Misa Mm shp lann nan Initial measurements According to PFVP 6 3 2 2 Details of mounting support WWE Ul Viopiayo iit amip gt Description of the test See figure 6 below Number of trials One per surface Verification after the test Perform the accessibility test 6 3 5 5 2 Perform the dielectric test 6 3 6 1 1 ee RE ee ee wr ew The unit may be non functioning after the test Impact test procedure 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 6 below Top surfaces The sphere is to fall freely from rest through a vertical distance of 1 300 mm to the rest of the top surfaces Vertical surfaces The sphere is suspended by a c
143. upport According to manufacturer s specifications for portable and hand held portable equipment Type of shock Half sine Shock severity 15 g peak 11 ms duration Application Two shocks per axis on three mutually perpendicular axes According to PFVP 6 3 2 2 According to PFVP 6 3 2 2 Measurement and verification during loading Verification after tests ISAEC 1131 2 1992 6 3 5 3 Free falls type test associated with normal service conditions Table 36 Free fails immunity withstand tests portable and hand held portable equipment Reference tests e Random and flat drops IEC 68 2 32 procedure 1 e Supported drops IEC 68 2 31 subciause 3 2 1 Preconditioning According to manufacturer s specifications According to PFVP 6 3 2 2 Equipment equipped with catalogued cable s Initial measurements Details of mounting support According to PFVP 6 3 2 2 According to PFVP 6 3 2 2 Measurement and verification during loading Verification after the tests 6 3 5 4 Free falls type test associated with transport and storage conditions Table 37 Free falls withstand test units within manufacturer s original packaging Each type of manufacturer s original packaging with the heaviest unit using it According to PFVP 6 3 2 2 Equipment equipped with catalogued cable s Selection of samples initial measurements Details of mo
144. way that the information paths to from these functions and parts are exercised 3 All the I O and communication channels of the basic PC system shall be exercised 4 All external and internal product status information reporting means such as displays lamps alarm signals self test results registers shall be exercised The test procedures shail include conditions to verify the related activities 5 All various PC system operation modes significant for the user s implementation such as Start up and shut down cold warm hot restart normal run normal stop program monitor with PADTs etc as applicable shall be verified for performance and behaviour 6 Initialization and reset conditions of all system components shall be checked for controlled start up and shut down The various modes such as run program monitor shall be verified for performance and behaviour 7 Coverage factors for modules units external I O wiring and removable connectors of each test program shall be 100 This applies to fuses batteries etc Optionally the manufacturer should provide in his documentation satisfactorily information on the coverage factors of both the built in self tests and test programs for functions internal to modules units Such factors cannot be equal to 100 8 Any special feature performance not covered in this standard but necessary to the proper operation of the basic PC system shall be exercised a

IS/IEC 1131-2 (1992): Programmable Controllers, Part 2: Equipment

Contents

Download Pdf Manuals

Related Search

Related Contents