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LN1000 User Manual

1. TYPICAL SIGNAL INPUTS RLY DTF 1 C 2 SUPPLY 24VDC SPD pt OV OVC V4VC T A RST M FR E INTERNAL DISTRIBUTION OF DI LI SIGNAL SUPPLY VOLTAGE INTERNAL 1A SIGNAL Y FUSE 24VDC LOGIC PPE oy SUPPLY Earthing All SIL safety annunciators are fitted with a separate earth stud which is located on the metal frame extrusion Warning To ensure the final installation meets all relevant safety standards and EMC directives this earth must be connected 58 9 RTK SIL725 Safety Annunciator F T O y C vv T V O 14 1 Standard Systems Using Externally Powered Inputs As an option systems can use externally generated signal supply voltage sources to power the inputs If the externally generated signal supply voltage is 24VAC DC then the standard annunciator can be used without modification The external supply should be connected to signal supply input terminals OVC and VC to distribute the voltage required to power the input contacts VC is used to internally link the e
2. INPUT 1 INPUT 2 FRONT VIEW DRIVES LEFT C DRIVES LEFT WINDOW LAYOUT HAND LED s HAND LED s IN CHANNEL 1 IN CHANNEL 2 P CH AA2 A B INPUT SL 6 4 2 CHANNEL 1 ES INPUT 1 INPUT 2 B DRIVES RIGHT D PRIVES RIGHT HAND LED s HAND LED s KA lt IN CHANNEL 1 IN CHANNEL 2 S D lt CHANNEL 2 54 gt RTK SIL725 Safety Annunciator 0 12 2 Optional Unit with Repeat Relay Facility Each cell is equipped with a type AAR2 back plate and 2 x dual channel alarm cards Model CB5674SIL2 located in the upper slot and CB5674SIL4 located in the lower slot Wiring Details for AAR2 Modules in Large Window Versions INPUT 1 INPUT 2 FRONT VIEW DRIVES LEFT DRIVES LEFT HAND LED s HAND LED s WINDOW LAYOUT IN CHANNEL 1 IN CHANNEL 2 INPUT RELAY OUTPUTS 1 C 2 C NC NO Ri NC NO R2 KD x ME 5 CH AAR2
3. AD option CH2 CH1 VR2 RL2 RL1 ET iB y RESPONSE TIME on 2200100010 ADJUSTMENT an MM 28 a 12 3 4 OFF cg MB06 DDDDDDDDDDD SW1 CARD MODEL CB5674SIL ALARM CARD 80 0 Input State 1 r24 NC DMNC DM IIL 23 4 ON OFF RTK SIL725 Safety Annunciator When using AD options Function F1 should be set to OFF and Switch SW2 located on each 2 channel alarm card should be used to set the inputs to normally closed as shown below Switch Function Default Description No Setting SW2 1 Ch 1 input state On Set the channel input state On SIL725 units the default is normally closed SW2 2 Ch 1 Delay Mode Off Set the channel return active to non active response time If switched on the return response will always be minimum response for that AD option The default is off SW2 3 Ch 2 input state On Set the channel input state On SIL725 units the default is normally closed SW2 4 Ch 2 Delay Mode Off Set the channel return active to non active response time If switched on the return response will always be minimum response for that AD option The default is off RTK SIL725 Safety Annunciator
4. oO RTK SIL725 Safety Annunciator 2 0 26 Other Products RTK Instruments Ltd are fully ISO9001 1994 approved and manufacture a comprehensive range of complementary products from our factory in Knaresborough N Yorkshire for use in the Industrial Control and Instrumentation field per the summary list provided below All standard products come complete with a 5 year guarantee gt gt Sequential event recorder Alarm management systems Configurable remote logic alarm systems Hazardous area alarm systems Power supplies Intrinsically safe alarm and status display products including LED beacons Sounders Led clusters Please ring the sales office on 0044 0 1423 580 500 for latest product information or visit our web site www rtkinstruments com RTK SIL725 Safety Annunciator FUNCTION SETTING LABEL Contact state Normally Open or Normally closed Contact Output Relay energised or de energised Auto Reset No Latch Operation Ringback Two button operation Reflash single operation Group Relay A Reflash Group Relay B Reflash First up sequence First up sequence Fl First up sequence F2 Lee First up sequence F3 First up Group A First up Group B First up Group C Alarm model Input from comm port Comms model First up Group D Alarm model Logic
5. 0 F12 First Up Sequence F2 This feature is used to enable First Up sequence F2 on individual channels as required First up sequence F2 disables first out all alarms will be seen as subsequent FEATURE F12 STATUS LED Set channel to first up sequence F2 not required Set channel to first up sequence F2 required F13 First Up Sequence F3 This feature is used to enable first up sequence F3 on individual channels as required First up sequence F3 Enables Fast Flash On subsequent alarms FEATURE F13 STATUS LED Set channel to first up sequence F3 not required Set channel to first up sequence F3 required F14 First Up Group A All alarms set to function F14 will operate as a single first up group in accordance with the selected first up sequence F14 is the function code allocated for first up Group A FEATURE F14 STATUS LED Set to remove channel from first up Group A Set to include channel in first up Group A F15 First Up Group B All alarms set to function F15 will operate as a single first up group in accordance with the selected first up sequence F15 is the function code allocated for first up Group B FEATURE F15 STATUS LED Set to remove channel from first up Group B Set to include channel in first up Group B F16 First Up Group C Not supported on SIL725 Annunciators F17 First up Group D Not supported on SIL725 Annunciators F18 Individual Channel
6. 7 3 Panel Mounting Clamps annunciator is shipped with the panel mounting clamps fitted to the sides of the unit these must be removed to allow the unit to be placed in the panel cut out and secured from behind Once the unit has been placed in the panel cut out the panel clamps and screws are used to secure the unit as shown below Maximum panel thickness 5mm Securing the Annunciator into the panel PANEL PANEL CLAMP WITH SCREW SIT HOOK ON CLAMP y INTO GROOVE IN FRAME eS AS SCREW TIGHTENS CLAMP IS SECURED gt 4 TO FRAME SECTION RTK SIL725 Safety Annunciator 8 Alarm Sequences 8 1 Summary Each channel within the annunciator can be set to operate in a pre defined manner in accordance with internationally recognised standards ISA S18 1 1979 R2004 alarm sequences Typically when an alarm occurs the associated window will flash and the operator uses specific pushbuttons to control the audible alarm and associated lamps or LED s Lamp Test is used to test the LED s windows by illuminating them in a steady on state for as long as the pushbutton is pressed The internal horn will also sound during this test System Test is used to simulate a full functional test therefore all windows and horn circuits will operat
7. 0 11 10 Power amp Remote Connections Customer connections for the common functions should be wired to the rear of the SPD module These connections are shown below COMMON CONNECTIONS 24VDC Logic power 24VDC Signal contact voltage OV amp V OVC amp VC ee ee lU Optional remote pushbutton inputs T Lamp test A Acknowledge R Reset ST System test M Mute FR First reset Pushbutton common connection V RLY DTF SUPPLY 24VDC SPD ov ove V VC T A STM FR N O FIRST RESET 5 0 MUTE 24VDC 5 0 SYSTEM TEST LOGIC kus 5 0 4 RESET 5 0 ACKNOWLEDGE LAMP TEST o 8533 RTK SIL725 Safety Annunciator 12 Large Window Alarm Module Wiring SIL725 Safety Annunciators supplied with large windows provide one alarm per cell 12 1 Standard Unit without Repeat Relay Facility Each cell is equipped with a type AA2 back plate and 2 x dual channel alarm cards Model CB5674SIL1 located in the upper slot and CB5674SIL3 located in the lower slot Wiring Details for AA2 Modules in Large Window Versions
8. eene rnnt nennt 53 12 Large Window Alarm Module Wiring 54 12 1 Standard Unit without Repeat Relay Facility essen 54 12 2 Optional Unit with Repeat Relay Facility esses 55 13 Medium Window Alarm Module Wiring 56 13 1 Standard Version without Repeat Relay Facility sess 56 13 2 Optional Version with Repeat Relay Facility esses enne 57 14 1 Standard Systems Using Externally Powered Inputs sse 59 17 System Configurations suain uacua rouen ad CE ra pana 64 17 1 Configuration Mode tnn nnns sata sitet 64 17 2 Changing a Function Setting ssi sisse eene nnn nnn nnns 65 RTK SIL725 Safety Annunciator 0 17 3 Gonfig ration Example u u e aba e dead etu cent p et ets 66 17 4 Checking Configuration Settings sisse 66 17 5 Systems with Unarmed Ways essen either sitne rene nnns 66 17 6 Points to Note when Conflfiguring eese sitne nnns nnns 66 18 Function No Key and Descriptions 111111111111 1 67 19 Function D
9. DU COMMON REF 24VDC LOGIC SUPPLY 60 O RTK SIL725 Safety Annunciator O INPUT RELAY OUTPUTS 1 C 2 C NC NO Ri NC NO R2 CH AAR2 1 C NC NO Ri NC NO R2 OV OVC V VC JU UU 24VDC LOGIC SUPPLY RTK SIL725 Safety Annunciator 15 SI O Module Details Larger units that require additional power distribution terminals are supplied with the optional SI O card The SI O module is located in the bottom row of each annunciator in the system to provide the additional connections required for logic power distributions Please note the SI O card can be fitted in addition to any alarm cards already located within the cell Warning A 24VDC supply should be independently connected to each annunciator unit within the scheme Power should not be daisy chained between units which would cause excessive current to flow within si
10. siis 33 6 4 Suitable Power Supplies esses sisse 34 6 6 SIE725 Safety Annunciators ied p eH ede Lena o 35 6 7 SIL725 Safety Annunciators Fitted With Repeat Relays Per 35 7 Mechanical Details U u eli J 36 7 1 SIL725 Overall and Cut Out Dimensions eene ennt 36 7 2 System Capacity dei ad dee din i i qala RE n e Pott e APR ran 36 7 3 Panel Mounting Clamps 37 8 Alarm 5690 38 38 8 2 Audible Alarm 38 9 Additional FealUres erret U lU xri nir ee cnin n e se nw cea 39 91 Automatc Reset i oe eet oo cote D E ne Hotte Te RES HORE 39 9 2 Non Latch Sequence No Lock In nennen nnns 39 9 8 o e C ERE e e EE ao 39 9 4 Ringback Seq uetice iei eed e te d c eret 39 9 5 Two Pushbutton OpefallOn cce o de ede me Ue ese ees os 39 96 First Up Sequences oe eee
11. 14 2 8 Eimits of Application d teet eb ete e cute o bo e e Pu 15 2 9 GettlfICatiOn s iain en ded dp n de ed tap dete a er Pes 15 2 10 CASS sons abinde eben aita dnb dr dte Fe etui p edere coe be PG 15 2 11 Proof Testing ice p e n t Ho oi 16 2 12 Checklist Safety Related System sisse eene nnne nnne 17 2 138 Hardware Failure Rates uu uns s t umasa f b e tas 17 3 System Description amp Features U 18 3 1 General u M 18 3 2 Window D cane 19 3 3 Laser Printed Legends uu k u i u sak kaspas 19 3 4 Adding or Changing Film Legends seien enne nnne 20 3 5 LED Nominations uite eo A o 20 3 6 Window Numbering 21 3 7 Alarm RR 22 3 8 Pushbutton Configuration Module sienne 22 3 9 Fully Field Configurable sienne enini nnne 22 3 10 Integral Audible ans enne then nannten k then an then annees 23 3 11 Remote Pushbutton Inputs assises esent nennen A nn then 24 3 12 Terminations ii e bie Ee e ide ERR e dte Ee ed borers 25 3 13 Failsafe Mode
12. INPUT _ RELAY OUTPUTS _ VS VS 1 C 2 C NC NO Ri NC NO R2 ete CHANNEL 1 INPUT 1 INPUT 2 DRIVES RIGHT DRIVES RIGHT HAND LED s HAND LED s IN CHANNEL 1 IN CHANNEL 2 C D CHANNEL 2 RTK SIL725 Safety Annunciator 13 Medium Window Alarm Module Wiring SIL725 Safety Annunciators supplied with medium windows provide two alarms per cell 13 1 Standard Version without Repeat Relay Facility Each cell is equipped with a type AA2 back plate and 2 x dual channel alarm cards Model CB5674SIL1 located in the upper slot and CB5674SIL3 located in the lower slot Wiring Details for AA2 Medium Window Versions INPUT 1 INPUT 2 FRONT VIEW DRIVES LEFT DRIVES LEFT A HAND LED s C HAND LED s WINDOW LAYOUT IN CHANNEL 1 IN CHANNEL 2 INPUT 1 C 2 C A AK gt CHANNEL 1 CH AA2 iE Ce 000 CHANNEL 2 INPUT 1 INPUT 2 DRIVES RIGHT D DRIVES RIGHT HAND LED s HAND LED s IN CHANNEL 1 IN CHANNEL 2 56 _ H_AMH_ysH _ o RTK SIL725 Safety Annunciator 60 Wiring Details for AAR2 Medium Window Versions 13 2 Optional Version with Repeat Relay Facility Each cell is equipped with a type AAR2 back plate 2 x dual channel alarm cards
13. CONDITIONS RETURN NORMAL D OPERATION TEST ACKNOWLEDGE AND TEST PUSHBUTTONS ALARM AUDIBLE DEVICE LOCK IN OF MOMENTARY ALARMS UNTIL ACKNOWLEDGED THE AUDIBLE DEVICE IS SILENCED AND FLASHING STOPS WHEN ACKNOWLEDGED AUTOMATIC RESET OF ACKNOWLEDGED ALARM INDICATIONS WHEN PROCESS 4 o RTK SIL725 Safety Annunciator 10 3 ISA A 4 Sequence Non Lock In Function SEQUENCE DIAGRAM PROCESS NORMAL TO ABNORMAL SEQUENCE NORMAL RETURN TO NORMAL VISUAL OFF RETURN TO NORMAL AUDIBLE SILENT Y PROCESS ABNORMAL PROCESS NORMAL SEQUENCE ACKNOWLEDGED WHILE dec in SEQUENCE ALARM VISUAL ON VISUAL FLASHING AUDIBLE SILENT AUDIBLE AUDIBLE SEQUENCE ISA 4 NON LOCK IN SEQUENCE TABLE PROCESS PUSHBUTTON SEQUENCE VISUAL AGDIBLE REMAKES CONDITION OPERATION STATE DISPLAY Device 1 NORMAL NORMAL OFF SILENT 2 ABNORMAL ALARM FLASHING AUDIBLE RETURN TO NORMAL BEFORE KONON LTE NORMAL OFF SILENT NON LOCK IN 4 ABNORMAL ACKNOWLEDGE ACKNOWLEDGED ON SILENT ADM AUTOMATIC 6 NORMAL NORMAL OFF SILENT RESET SEQUENCE FEATURES gi Rom ACKNOWLEDGE AND TEST PUSHBUTTONS ALARM AUDIBLE DEVICE NON LOCK IN OF MOMENTARY ALARMS THE AUDIBLE DEVICE IS SILENCED AND FLASHING STOPS WHEN ACKNOWLEDGED AUTOMATIC RESET OF ALARM INDICATIONS WHEN PROCESS CONDITIONS RETURN TO NORMAL BEFORE OR AFTER AC
14. Lens Bezel Slot to aid Film Legend ens removal Coloured Filter m Diffuser I p ow LASER CO PRINTED FILM LEGEND 3 5 LED Illumination All units are supplied with fit and forget LED assemblies The colour of the LED can be changed to suit individual applications The following colours are available Part no P725 LED 2 specify colour suffix using the table below COLOUR RD Rede s The LED assemblies plug into the associated lamp socket and can therefore be easily changed as required 20 O RTK SIL725 Safety Annunciator _ SS 8 3 6 Window Numbering System RTK have adopted the following window numbering system to aid with the location of the film legend and the associated alarm cards This method is used to ensure that the legend matches the functions selected for the designated alarm COMMON 2 SAFETY RELAY CELL quc Test RESET MUTE power TYPICAL LARGE WINDOW VERSION 1 OPTIONAL COMMON SAFETY RELAY 2 CELL 3 COMMON SAFETY RELAY CELL 4 mr ACK 6 es POWER C TYPICAL MEDIUM WINDOW
15. Each two input alarm input card contains some circuitry that is independent and some that is Alarm input channel 1 Alarm input Motherboard channel power common parts distribution etc Alarm input 0 100 Apu 0 009 channel 2 Apu 0 033 Safety relay output LED alarm 0 002 window 1 LED alarm window common cause failures Apu 0 009 LED alarm window Apu 0 001 2 Apu 0 009 Internal audible HNA only Apu 0 019 common to the two input channels The failure rate shown for Alarm input channel common parts O 85 RTK SIL725 Safety Annunciator includes both the failure rate of those parts plus an allowance for common cause failures in the input channels Since each input channel is associated with a separate LED alarm window the reliability block diagram shows these in parallel with an allowance for common cause failures It is assumed that either LED alarm window illuminating is sufficient as an alarm The failure rate of a safety function implemented as 1002 cannot be calculated by simply adding failure rates in a similar manner to the 1001 safety function Section 6 shows how to calculate the probability of failure on demand for 1001 and 1002 safety functions The following table lists all the failure rates for the 1002 configuration using the same input card Asu Alar
16. 22 Safety Calculations 22 1 What is in this chapter To comply with IEC 61508 and or related standards the user needs to show that the failure rate of each safety function meets the safety target for the risk being protected Each safety function must be considered separately as each safety function in general protects a separate risk A safety function must be considered as the complete system from the input device that senses something about the process through the equipment that evaluates and processes the information the logic solver to the output device that takes some action on the process in response to a demand The SIL725 may act as the logic solver to a number of safety functions This chapter gives the failure rate data for the SIL725 that the user needs to calculate the failure rate and probability of failure on demand for each safety function The user is responsible for the correct and appropriate use of this information in his particular application This information is intended for competent persons with an appropriate knowledge of safety engineering and IEC 61508 22 2 Modes of operation The SIL725 has two input channels on each active alarm card so that each cell has effectively 2 inputs Each input may be configured to one of four group safety relay outputs HNA HNB GPA or GPB Consequently each safety relay output may be driven by one two or several inputs and may be part of one or more than one sa
17. Internally distributed signal supply voltage SUPPLY 24VDC SPD OV OVC V VC T A RST MFR 1 2 1 C2 C 100 Oo Z N 74 N x P Internal 1A signal ov 424V supply fuse Logic supply 26 O RTK SIL725 Safety Annunciator 0 4 4 External Signal Supply Voltage Annunciators can be supplied suitable for connection to direct powered inputs as an option with the signal supply voltage being supplied from outside the annunciator by others In this application the logic supply OV and V and signal supply OVC and VC inputs located on the SPD module are independently wired and fully isolated from each other OPTION CODE VOLTAGE 24V ACDC 048 48V AC DC T25V AGIDC 4 5 Input Time Delay Option AD As an option each channel can be provided with a potentiometer which allows the user to select a time delay to prevent the alarm from occurring unless it has been present for a pre defined period Three separate time ranges are available please note the required option must be specified at time of order for the additional components to be added to the alarm card 1 Option AD1 Adjustable Delay Range 5 50 ms 2 Option AD2 Adjustable Delay Range 20ms 2 seconds 3 Option AD3 Adjustable Delay Range 5ms 5 seconds The AD option allows the user to have a fast return to normal mode This means the user can have a delay on the input when
18. Please note The Repeat Relay option should be specified at the time of ordering 11 5 Customer Specified Response Time Option CRT The response time for standard units is factory set at 35ms If alternative response times are required option CRT is used to specify a fixed response time between 1ms and 2 seconds 11 6 Customer Adjustable Response Time Option If specified at the time of order each channel can be supplied with a trim pot that allows the user to adjust the response time between two set points as required AD1 5ms to 50ms AD2 35ms to 2 seconds or AD3 5ms to 5 seconds The trim pot is marked with 10 increments each increment is worth 10 of the maximum delay time For best results customers should always choose the most appropriate AD option for their application i e the AD option which gives the most adjustment around the required response time Please note When setting activation delays it is important to note that the same delay will apply to the return to normal state for example If a channel is set for 5 Seconds delay the input contact must be in the abnormal state for a minimum of 5 Seconds before the alarm activates Once the input contact has returned to normal the channel will not recognise the return to normal state for a minimum of 5 Seconds and therefore the channel cannot be reset until this delay has elapsed On P725 annunciators supplied after March 2009 where either AD2 or AD3 option i
19. 110VDC Resistive Load 4 0A 240VAC Individ alchannal Each alarm can be supplied with an individual repeat relay with a Repeat ralav option changeover contact rated 2A 24VDC 0 4A 120VAC resistive 0 5A P Xp 125VDC resistive Maximum voltage 220VDC 250VAC Window sizes H x W Medium 30 x 60 mm OR Large 60 x 60 mm Red Amber Yellow Green White or Blue fit amp forget LED assembly 2 Medium windows use dual LED arrays Illumination Large windows use quad LED arrays Laser printed film legends plus software template if required EMISSIONS TO BS EN61000 6 4 2001 BS EN61010 1 1993 Operating temp 0 to 95 RH Non Condensing mounting enclosures 2 0 RTK SIL725 Safety Annunciator 6 1 General Supply voltage 24VDC 21 to 28VDC Quiescent supply current 18mA per channel 24VDC ALARM STATE CURRENT FIT AND FORGET PER CHANNEL L E D VERSION Medium Large window size window window Standard systems 40mA 80mA Systems with repeat relays 50mA 90mA Pushbutton Module 100mA 100mA 6 2 Fuse Details SPD Module FUSE FUNCTION RATING TYPE PURPOSE annunciator Protects the signal supply voltage feed to the common terminals 6 3 Fuse Details SIO Module FUSE FUNCTION RATING TYPE PURPOSE PURPOSE gt o ol c F1 Logic supply 5A T 20x 5mm Protects additional 24VDC supply feed when current required exceeds one SPD module F2 Signal supply 1A F Surface m
20. Model CB5674SIL2 located in the upper slot and CB5674SIL4 located in the lower slot INPUT 1 INPUT 2 FRONT VIEW ORIVES LEFT C DRIVES LEFT WINDOW LAYOUT HAND LED s HAND LED s IN CHANNEL 1 CHANNEL 2 INPUT RELAY 1 C 2 C NC NORI NC NO R2 A x B YS LS s CHANNEL 1 CH AAR2 INPUT RELAY m E C 69 D 69 1 C 2 C NC NO RI NC NO R2 a CHANNEL 2 INPUT 1 INPUT 2 DRIVES RIGHT DRIVES RIGHT B HAND LED s D HAND LED s IN CHANNEL 1 IN CHANNEL 2 RTK SIL725 Safety Annunciator 14 Standard Systems with Combined Logic and Signal Supply In standard systems the 24VDC logic supply OV and V is cross linked to the signal supply input terminals OVC and VC to provide the voltage required to power the input contacts Systems are supplied with a factory fitted jumper between these terminals The signal supply input terminal VC is used to internally link 24VDC Via a fuse to all of the common terminals within the annunciator marked C ready for connection to customer signal contacts Systems Using A Single 24VDC For Logic And Signal Supply
21. SUPPLY 24VDC SPD e V OVC T A R STM FR FIRST RESET MUTE SYSTEM TEST RESET ACKNOWLEDGE LAMP TEST Please note The common return for the remote pushbutton inputs is always V 24VDC RTK SIL725 Safety Annunciator 0 3 12 Terminations All active cells within the annunciator are provided with quick disconnect 2 part pluggable rising clamp terminals capable of accepting up to 2 5mm cable In the unlikely event that a card fails the associated field wiring can remain connected and the terminal temporary unplugged to allow removal and replacement of the associated card 3 13 Failsafe Mode All relays are configured in their default setting as energised fail safe The relays will de energise on trip or in the case of a power failure RTK SIL725 Safety Annunciator 4 Inputs 4 1 Optically Coupled Inputs All alarm inputs are provided with optical couplers and a transient filter is built into the input circuitry so that low voltage interference will be ignored 4 2 Standard Input Configuration The annunciator can be set to operate from volt free signal contacts th
22. nu maana u a a u aaa da 94 24 5 Fuse FEDIACOMONt 2 255 io oe Ce e ete oe e ee ea e eot 95 25 Spare Parts Description annoa tuna a U 96 26 Other RTK Products 97 RTK SIL725 Safety Annunciator Contact state Normally Open or Normally closed Contact Output Relay energised or de energised Auto Reset No Latch Operation Ringback Two button operation Reflash single operation Group Relay A Reflash Group Relay B Reflash First up sequence First up sequence Fl First up sequence F2 m b First up sequence F3 First up Group A First up Group B First up Group C Alarm model Input from comm port Comms model First up Group D Alarm model Logic from comm port Comms model Relay follow logic Relay follow input Disable relay operation on system test Group Relay A Group Relay B Horn A Horn B Alarm model only SIL2 Specification Function is NOT compatible Function is NOT supported Refer to SIL manual for clarification RTK SIL725 Safety Annunciator 1 Introduction SIL725 Safety Annunciator is designed and manufactured to provide high level of availability for critical alarm applications and for use as a component part of a safety instrumented system
23. ACKNOWLEDGED OPTION1 SILENCE PUSHBUTTON TO SILENCE THE ALARM AUDIBLE DEVICE WHILE SAME VISUAL INDICATION AS ACKNOWLEDGED ALARMS NO CONDITIONS RETURN TO NORMAL 8 OPERATIONAL TEST FIRST OUT INDICATION IS RESET WHEN ACKNOWLEDGED MANUAL RESET OF ACKNOWLEDGED ALARM INDICATIONS AFTER PROCESS FLASHING INDICATION FOR FIRST ALARM ONLY NEW SUBSEQUENT ALARMS HAVE THE o 49 RTK SIL725 Safety Annunciator 11 Options 11 1 General The SIL725 Series alarm annunciator is designed to meet the majority of alarm specifications but in certain applications additional options may be required Please consult factory if you would like to check suitability of adding options to existing units 11 2 LED Assemblies Fit and forget LED assemblies are available in the following colours Red Amber Yellow White Blue or Green Please note all alarm cards are equipped with dual function output drives allowing the standard card to be used with either conventional filament lamps or LED s SIL725 annunciators are not available with filament lamps thus this function must be set to LED s Switch SW1 8 on each card must be selected to OFF for the SIL Safety Annunciator version FUNCTION SW1 8 Outputs suitable for driving LED s 11 3 Tropicalisation Standard on all SIL725 Annunciators 11 4 Individual Channel Repeat Relays Option RLY As an option each dual channel alarm card within the annunciator can be supplied with two relays to allow
24. It is based on the well proven P725 with the addition of enhanced circuitry for safety critical applications The SIL725 is third party certified by SIRA using the CASS Scheme for use in safety functions up to a safety integrity level of SIL2 WARNING This Safety Related product should only be used in accordance with the limitations as detailed on the following pages Safety Integrity can only be maintained if the product is used within these limitations Only qualified personnel with appropriate knowledge of the IEC61508 standard should utilise this product as part of a safety instrumented system The Annunciator is used to provide visual and audible warning that a process has gone beyond set limits or to provide status only indication The safety relay outputs may be used to drive inputs of a safety control system for example or may be used directly to initiate a safety function The Annunciator is manufactured from universal cells each 60 x 60mm which can be assembled in an array to provide the number of rows and columns required to suit individual panel designs Each cell within the Annunciator is able to contain either one large or two medium alarm windows which are illuminated by fit and forget LED Assemblies The assembled unit is fully field Configurable which allows the user to enable a number of pre defined features to control the operation of the Annunciator with regards to alarm sequence horn groups common alarm group
25. Repeat Relay Follows Alarm Logic Q 1 RTK SIL725 Safety Annunciator A relay set to function F18 will activate on alarm and remain in the alarm state until the alarm has returned to normal and the associated pushbuttons have been pressed Please note The individual relay is activated by the alarm logic or when system test is pressed See function F20 FEATURE F18 STATUS LED Set Channel To Off If This Feature Is Not Required Set Channel To Repeat Relay Follows Alarm Logic F19 Individual Channel Repeat Relay Follows Signal Input A relay set to function F19 will activate when the signal input is in the alarm state and will automatically return to normal when the signal input returns to normal Please note The individual relay is only activated by its signal input and never operates as a result of lamp or system test only FEATURE F19 STATUS LED Set Channel To Off If This Feature Is Not Required Set Channel To Repeat Relay Follows Signal Input F18 And 19 Individual Channel Repeat Relay Follows Display A relay set to both function F18 and F19 will follow the alarm display Please note The individual relay operates as a slave of the lamp output signal and when system test or lamp test is pressed The relay cannot be prevented from operating when lamp or system test are pressed See function F20 FEATURE F18 AND F
26. VERSION RTK SIL725 Safety Annunciator 3 7 Alarm Card Types There are 4 basic types of dual channel alarm cards PART NO DESCRIPTION USED ON CB5674SIL1 2 Channel alarm card Large and medium window versions Without repeat relays Locates in the upper slot of the associated cell 2 Channel alarm card Large and medium window versions PESO tae lle With repeat relay facilit Locates in the upper slot of the associated cell CB5674SIL3 2 Channel alarm card Large and medium window versions Without repeat relays Locates in the lower slot of the associated cell CB5674SIL4 2 Channel alarm card Large and medium window versions With repeat relay facility Locates in the lower slot of the associated cell Card types are supplied suitable for operation from a signal supply voltages of 24VDC Alarm cards are plugged into the rear of the annunciator and once inserted automatically connect to a pre tested passive display motherboard 3 8 Pushbutton Configuration Module The SPD pushbutton configuration module is located in the bottom right hand corner of the annunciator when viewed from the front It has a power on LED integral audible and six tactile pushbuttons to cover all of the possible sequence combinations The six pushbutton functions are Lamp Test System Test Mute Acknowledge Reset and First Reset 3 9 Fully Field Configurable In addition to controlling the alarm sequence the pushbutton module is also used as a configura
27. can be used for Pre Trip conditions Each channel is equipped with its own removable bezel which contains 1 A clear lens 2 White diffuser 3 Coloured filter 4 Laser printed film legend The following table details the associated part numbers for spare parts ordering purposes Part Clear filter used with white windows Red fiter 3 3 Laser Printed Legends Laser printed film legends are easily generated from within Microsoft Excel in a font style size and language to suit individual applications A software template is available free of charge from RTK which allows the user to produce film legends locally using acetate film and a laser printer Completed film legends are located between the clear front lens of the removable window assembly and the associated coloured filter and diffuser RTK SIL725 Safety Annunciator 3 4 Adding or Changing Film Legends Each lens assembly has a small slot in the upper ridge of the surround bezel which allows a flat blade terminal screwdriver to be used to gently lever the assembly forward Once the assembly has been removed the diffuser coloured filter and film legend can be accessed using a flat blade screwdriver to gently lever the lens clear of the associated parts as indicated in the diagram below This MUST be levered on the side NOT the top or bottom
28. eed e i bie ede e DER 39 10 Sequence Configuration and Tables 41 10 1 JeA Sequence M ee ERR E RE YR Seabee alis my nn ee ake 41 10 2 JG A Sequernice A ooi EPOR PR E Pte t IRE RE o EA eR ERE pope sas 42 10 3 ISA A 4 Sequence sisse sisse 900 ay aaa 43 10 4 ISA H Sequence ana sib EH RENE He ote ERR AERE Pene propa ias 44 10 5 ISA F2M 1 Sequence 46 10 6 IGA FSA Seguen E ies ep DERE eR MERE Ee 48 11 ODpUttiOnS m 50 Tib General steh ted re aie E t ei re e tl eile 50 11 2 EED Assemblies b dee een de tan tidie aee e bte ta bees 50 FLS TropicaliSallOr it eaa o dee nidi tendit ebria 50 11 4 Individual Channel Repeat Relays Option RLY sse 50 11 5 Customer Specified Response Time Option 51 11 6 Customer Adjustable Response Time Option AD 51 11 7 SPD Module Supply Pushbutton Module esses 52 11 8 Logic Power Connections sessi sh 52 11 9 Signal Supply Voltage Connecltions sienne nnne nnns 52 11 10 Power amp Remote Conneclions
29. from comm port Comms model Relay follow logic Relay follow input Disable relay operation on system test Group Relay A Group Relay B Horn A Horn B Alarm model only SIL2 Specification Function is NOT compatible Function is NOT supported Refer to SIL manual for clarification 98 0 RTK SIL725 Safety Annunciator Function Setting per Alarm Sequence FUNCTION FEATURE STD ISA SEQUENCES FIRST UP ISA SEQUENCES STATUS NUMBER DESCRIPTION M A a4 R F2MM F3A FFAM2 ONLY F4 NOT COMPATABLE WITH SIL725 ANNUNCIATORS F11 NOT COMPATABLE WITH SIL725 ANNUNCIATORS When using First Up sequences First Up Group B Ge Oe HET s channel into the required First Up Group A B C NOT SUPPORTED ON SIL725 ANNUNCIATORS or D Channels can linked to more than one group if required NOT SUPPORTED ON SIL725 ANNUNCIATORS HNA Horn Drive Channels selected to F23 will drive the internal horn and HNA horn relay HNB Horn Drive Channels selected to F24 will drive the HNB horn relay only Note1 When using Std ISA sequences Functions F10 or F13 sets the preferred Flash Rate F10 slow flash F13 fast flash 99
30. from the RTK range of products Each PSU provides a 24VDC output for use as the logic voltage to the annunciator PSU RATING LED VERSION QQ24VDC 24VDC WINDOW CURRENT A 2 4 6 7 SIL725 Safety Annunciators Fitted With Repeat Relays Per Channel PSU RATING LED VERSION 24VDC WINDOW TYPE CURRENT A MEDIUM LARGE Larger PSU or multiple PSU can be used if required RTK SIL725 Safety Annunciator 7 Mechanical Details 7 1 SIL725 Overall and Cut Out Dimensions Overall Cut Out 6 384 374 8 504 494 9 564 54 Please note The cut out tolerance should be with 2mm Annunciator depth is 145mm Caution The above table indicates the dimensions based on the number of cells high x cells wide this should not be confused with the number of alarm windows high and wide which can vary depending on required window size e When using Large Windows 60mm W x 60mm H there is 1 alarm per cell e When using Medium Windows 60mm W x 30mm H there would be 2 alarms per cell 7 2 System Capacity The maximum number of alarms available within a single annunciator is dependent on the maximum number of cards the system can address This is fixed at 128 two channel cards making the maximum system 128 channels as each channel requires two independent inputs 36 O RTK SIL725 Safety Annunciator
31. function from asserting in response to a demand at the input That is a dangerous undetected failure prevents either the safety group relay from de energising or the LED alarm window from illuminating or for HNA only the internal audible from sounding If all of these outputs are included as part of the safety function then the total dangerous undetected failure rate is the sum of the individual total dangerous undetected failure rates shown 0 17 pmh or 1 7 x 10 failures per hour RTK SIL725 Safety Annunciator Some dangerous failures of the alarm input card are detected by internal diagnosics Such faults are known as dangerous detected f a fault is detected the diagnostic relay is de energised The diagnostic relay contacts can be configured to either assert the safety function or to assert a diagnostic alarm calling for maintenance The contacts must be configured to one or other of these options Other failure modes may either have no effect on the safety function or they will cause the safety function to assert without a demand being present Together they are classed as safe undetected failures The SIL725 has no safe detected failures Failures that cause the safety function to assert without a demand being present are often known as a Spurious trip The following table lists all the failure rates for the 1001 configuration Aspurious Asu Alarm input 0 129 0 019 0 081 0 333 cha
32. has been enabled or the user can move to an adjacent channel to allow the alarm window to be used in the normal way 17 5 Systems with Unarmed Ways Each dual alarm card in the system is provided with a unique binary address which is set using on board DIL switches during manufacturing If the system has been supplied with unarmed ways the address normally used for the associated channels will be reserved to allow the user to add the card at a later date The Configuration module is designed to stop navigating between channels when it detects a missing card address normally the last card in the system When the channel navigation stops because of unarmed ways it is necessary to jump over the missing address to access any further channels To jump an address the user needs to hold down the reset pushbutton and then press and hold the channel up or down pushbutton 17 6 Points to Note when Configuring Alarm channels are always numbered in a standard format depending on window size and the channel up down pushbuttons are used to move between each channel in the correct order Alarm channels MUST always be configured in pairs The selected feature is only stored when the user selects an adjacent channel either going up or down After the Configuration is complete it is recommended that the user checks the required functions have been enabled correctly After Configuration it is recommended that any channels that have been changed a
33. in functions are not recommended when using first up sequences as the true sequence of events cannot be guaranteed 5 0 C O RTK SIL725 Safety Annunciator 0 10 Sequence Configuration and Tables Each pair of alarm channels can be configured to suit the operating sequence required as listed in the ISA publication Annunciator sequences and specifications 518 1 1979 R2004 Systems be configured with different features on each individual channel and there is no need to switch the power off when making these changes Different operating modes can be selected using the integral Pushbutton Configuration module as described later in this manual The following tables show the most commonly used examples 10 1 ISA Sequence M Manual Reset SEQUENCE DIAGRAM PROCESS NORMAL SEQUENCE NORMAL VISUAL OFF RESET TO WHILE NORMAL ABNORMAL AUDIBLE SILENT ABNORMAL ABNORMAL PROCESS OR NORMAL PROCESS OR NORMAL SEQUENCE ACKNOWLEDGED SEQUENCE ALARM ACKNOWLEDGE VISUAL ON VISUAL FLASHING AUDIBLE SILENT AUDIBLE AUDIBLE SEQUENCE ISA M MANUAL RESET SEQUENCE TABLE ALARM PROCESS PUSHBUTTON VISUAL LINE CONDITION OPERATION SEQUENCE STATE DISPLAY AUDIBLE REMARKS 1 NORMAL NORMAL OFF SILENT 2 ABNORMAL ALARM FLASHING AUDIBLE LOCK I
34. soe p die o ded e eR ed oe 25 4 InDUIS Guadix Erde real Hed ER E 26 4 1 Optically Coupled Inp ts ih eoe TOR HR 26 4 2 Standard Input Configuration ssi siis essen tnnt nnne 26 4 3 Typical Signal Supply Voltage sss siis ee ennt nnne nnne 26 4 4 External Signal Supply Voltage sss esie eterni nnne nnne 27 4 5 Input Time Delay Option n 27 4 6 Input Wiring Segregation esses esee L nnns nnne 27 4 7 NO Master Module ode E a E P Ee E de dent 27 5 Common Safety Relay Outputs ceres 28 ot Hom Aelay A HNA ione Dp Ren es As Bee bs 29 5 2 Horn Relay optional u u 29 5 3 Group Relay A GPA isi de p ue aed oh td ce 29 5 4 Group Relay B GPB optional sss sienne nnne rnnt 29 5 5 Common Safety Relay Function 30 5 6 Low Voltage Lockout LVL Board sss ener nennen 31 RTK SIL725 Safety Annunciator 6 Technical Specifications 32 6 4 General ia 33 6 2 Fuse Details SPD 20 24 2 2 33 6 3 Fuse Details SIO Module
35. to position yourself with the load RTK SIL725 Safety Annunciator Front View Examples COMMON SAFETY 1 3 5 RELAY CELL Li OPTIONAL R 22 COMMON CED 2 4 SAFETY Sere a RELAY Ses ey CELL QW mo Typical Large Window Version OPTIONAL COMMON SAFETY RELAY 2 8 CELL COMMON SAFETY RELAY 1 0 CELL 11 _ RTK RESET FIRST J N RESET POWER 12 Typical Medium Window Version RTK SIL725 Safety Annunciator 2 Functional Safety 2 1 IEC 61508 IEC 61508 Functional safety of electrical electronic programmable electronic safety related systems Parts 1 7 is the basic safety standard covering the management of functional safety and the implementation and use of equipment in functional safety systems The standard uses a life cycle approach that covers the whole life cycle of the system from initial risk assessment through allocation of safety requirements design and build installation commissioning and maintenance The SIL725 complies with IEC 61508 as a component part of a safety system It is the user s responsibility to ensure that the SIL725 is properly installed and used in accordance with IEC 61508 and with the limitations in this manual and that all the relevant requirements of IEC 61508 are met for the complete saf
36. 0 STATUS CHANNEL STATUS FUNCTION NICO Da Ti Once the unit is in the CONF programme mode the window associated with the channel selected for Configuration will fast flash 1 The LAMP TEST SYST TEST pushbuttons are used to select the required channel 2 The RESET FIRST RESET pushbuttons are used to select the required Function No 3 The ACK MUTE pushbuttons are used to enable or disable the feature Note If the status LED is on the feature has been enabled Important note If the user configures a channel as detailed above and simply returns the unit to the run mode by placing the CONF switch to the off position the information will not be stored Configuration changes are only stored after the user has moved onto an adjacent channel using the system test or lamp test pushbuttons at that point the configuration is stored in EEPROM on the associated alarm card RTK SIL725 Safety Annunciator 17 3 Configuration Example Example If channel 7 is currently set to manual reset but the user would like to change this to allow the window to automatically reset after acknowledge the following procedure should be followed 1 First hinge down the pushbutton module to access the Configuration plate Place the unit into CONF Configuration mode using the yellow switch to the left of the displa
37. 1 Channel 1 and VR2 Channel 2 as required Turn the trim pot in a clockwise direction to increase the response time RTK SIL725 Safety Annunciator Return to Normal Delay Period In standard applications any delay period set for alarm initiation is also applied to the return to normal state For example if a 5 second delay is set the alarm will not activate until the input has been in the abnormal state for a minimum of 5 seconds If the alarm returns to normal the same delay period of 5 seconds will apply before the alarm state returns to normal In some applications customers prefer the alarm to have a delay before the alarm activates but as soon as the input returns to normal they require the alarm to return to the non alarm condition Switch SW2 on the alarm card the Delay Mode will activate a fast return to normal when switched on e SW2 1 amp are used to set the Input state to Normally Open N O or Normally Closed N C On SIL units these switches will always be on so the input state remains N C e SW2 2 amp 4 used to set the Delay Mode e When the Delay Mode DM switch is off the delay for an input going active is the same as it is when the input goes from active to inactive The time is set by VR1 and VR2 e When the DM switch is set the delay for input going to active is set by VR1 and VR2 When the input is going inactive from active the delay will be the minimum time response for that
38. 19 STATUS LED Set Channel To Off If This Feature Is Not Required Set Channel To Repeat Relay Follows Display F20 Inhibit Group Repeat Relays On System Test If any channel in the system has been assigned to either the GPA or GPB relays using function F21 or F22 and system test is pressed the group relays will activate However if function F20 is enabled the GPA and GPB relays cannot be triggered by system test FEATURE F20 STATUS LED Set Channel To Operate The GPA amp GPB Relays On System Test Set Channel To Inhibit The GPA amp GPB Relays On System Test F21 Safety Group A GPA Relay Each channel can be set to operate the Safety Group A relay using function F21 When set the alarm channel will activate the group relay when an alarm occurs and the relay will remain active until the alarm has returned to normal and the channel has been acknowledged and reset FEATURE F21 STATUS LED Remove channel from the safety group relay GPA Set channel to operate the safety group relay GPA 72 O RTK SIL725 Safety Annunciator 0 22 Safety Group GPB Relay Optional Each channel can be set to operate Safety Group B relay using function F22 When set the alarm channel will activate the group relay when an alarm occurs and relay will remain active until the alarm has returned to normal and the channel has been acknowledged and reset FEATURE F22 STATUS LED R
39. 93 ON 94 OFF 95 ON OFF ON OFF ON 100 OFF 101 ON 102 OFF 103 ON 104 OFF 105 ON 106 OFF 107 ON 108 OFF 109 ON 110 OFF 111 ON 112 OFF 113 ON 114 OFF 115 ON 116 OFF 117 ON 118 OFF 119 ON RTK SIL725 Safety Annunciator Alarm Card DIL Switch SW1 Address Settings 121 To 127 MERC CCHEMEN 2 to 4 12 1 78 __ So RTK SIL725 Safety Annunciator 60 21 Adjustable Response Times If specified at the time of order alarm cards can be supplied with single turn potentiometers that allows the user to set the reponse time of each input Three time ranges are available 1 Option AD1 5 50 ms 2 Option AD2 20ms 2 seconds 3 Option AD3 5ms 5 seconds ALARM CARD CH2 CH1 VR2 VR1 RL2 RL1 AN NC DMNC DM on n 00000000000 ON LE 2 3 1 2 3 4 OFF 1 A4506 5 1 SW2 om S 00000000000 SW1 CARD MODEL NO CB5674SIL RESPONSE TIME ADJUSTMENT To access the individual alarm card the plastic cover plate on the rear of the associated cell must be removed by squeezing the lock in tabs on either side of the cover The alarm card can then be removed to allow adjustments to be made to VR
40. Board Part No CB8306SIL This board is located in the upper slot of the SPD Cell and is designed to monitor e The logic supply of each alarm card 1 Up control line e When the unit is in the configuration mode The Low Voltage Lockout Boards relay will trip if any of the following conditions apply 1 If the logic voltage is detected as being low card fault 2 If the 1 Up control line has been detected as being held low 3 If the annunciator is in the configuration mode RLY DTF EJ LI LJ SUPPLY 24VDC SPD OV OVC V VC T A ST M FR IO OO BOB ZU ov 24V Logic supply PLEASE NOTE 1 The Diagnostic relay operation is linked to the Safety Relays GPA GPB HNA HNB i e If the diagnostic relay is de energised it will cause the Safety relays to de energise However if a safety relay is de energised it will not cause a diagnostic de energise 2 If the safety relays are required to work independently a link should be placed across the DTF terminals In these situations a different method for monitoring the diagnostic relay contact must be used The diagnostic relay contact is open when the then relay is de energised 3 When the Annunciator is powered on the diagnostic relay will take approx 5 seconds to energise If the DTF link is NOT m
41. EDGED 5 RINGBACK VISUAL AND AUDIBLE INDICATIONS WHEN PROCESS CONDITIONS RETURN TO NORMAL 6 MANUAL RESET OF RINGBACK INDICATIONS 7 OPERATION TEST o 45 RTK SIL725 Safety Annunciator 10 5 ISA F2M 1 Sequence Manual Reset First Up SEQUENCE DIAGRAM PROCESS NORMAL FIRST TO RESET WHILE NORMAL SEQUENCE NORMAL ABNORMAL VISUAL OFF AUDIBLE SILENT SUBSEQUENT TO ABNORMAL ABNORMAL PROCESS OR NORMAL SILENCE SUBSEQUENT SEQUENCE ACKNOWLEDGE VISUAL ON AUDIBLE ON ABNORMAL ABNORMAL PROCESS OR NORMAL PROCESS OR NORMAL SEQUENCE ACKNOWLEDGED ACKNOWLEDGE SEQUENCE FIRST ALARM FIRST OUT RESET VISUAL ON VISUAL FLASHING AUDIBLE SILENT AUDIBLE AUDIBLE ame ABNORMAL OR NORMAL ACKNOWLEDGE FIRST OUT RESET SEQEUNCE FIRST SILENCED SILENCE VISUAL FLASHING AUDIBLE SILENT SEQUENCE ISA F2M 1 MANUAL RESET FIRST OUT WITH NO SUBSEQUENT ALARM FLASHING amp SILENCED PUSHBUTTON 46 oO RTK SIL725 Safety Annunciator SEQUENCE TABLE ALARM PROCESS PUSHBUTTON SEQUENCE VISUAL CONDITION OPERATION STATE DISPLAY DEVICE REMARKS 1 NORMAL NORMAL OFF SILENT 2 FIRST ABNORMAL FIRST ALARM FLASHING AUDIBLE LOCK IN 3 SUB ABNORMAL SUB ALARM ON AUDIBLE LOCK IN 4 ABNORMAL FIRST OUT OR NORMAL ACKNOWLEDGE 27 RESE
42. KNOWLEDGE NON LOCK IN OPERATION TEST oM RTK SIL725 Safety Annunciator 10 4 ISA R Sequence Ringback SEQUENCE DIAGRAM PROCESS NORMAL sd ABNORMAL SEQUENCE NORMAL VISUAL OFF RESET AUDIBLE SILENT PROCE NORMAL PROCE ABNORMAL OCESS o OCESS OR NORMAL ACKNOWLEDGE SEQUENCE RINGBACK WHILE NORMAL SEQUENCE ALARM VISUAL SLOW FLASHING VISUAL FAST FLASHING RETURN AUDIBLE PULSING TO ABNORMAL AUDIBLE AUDIBLE RETURN ACKNOWLEDGE TO NORMAL WHILE ABNORMAL PROCESS ABNORMAL SEQUENCE ACKNOWLEDGED VISUAL ON AUDIBLE SILENT SEQUENCE ISA R RING BACK 44 Co RTK SIL725 Safety Annunciator SEQUENCE TABLE PROCESS PUSHBUTTON SEQUENCE VISUAL ALARM LINE CONDITION OPERATION STATE DISPLAY DEVICE REMARKS 1 NORMAL NORMAL OFF SILENT FAST 2 ABNORMAL ALARM FLASHING AUDIBLE LOCK IN ABNORMAL ACKNOWLEDGE ACKNOWLEDGED ON SILENT MOMENTARY 3B NORMAL ACKNOWLEDGE TO LINE 4 ges mon MANUAL 4 NORMAL RINGBACK FLASHING SILENT RESET REQUIRED RETURN TO 5 ABNORMAL TO LINE 2 SOREL MANUAL 6 NORMAL RESET NORMAL OFF SILENT SEQUENCE FEATURES 1 ACKNOWLEDGE RESET AND TEST PUSHBUTTONS 2 ALARM AUDIBLE DEVICE OPTIONAL RINGBACK AUDIBLE DEVICE 3 LOCK IN OF MOMENTARY ALARMS UNTIL ACKNOWLEDGED 4 THE AUDIBLE DEVICE IS SILENCED AND FLASHING STOPS WHEN ACKNOWL
43. L FIRST OUT RESET ABNORMAL WHILE NORMAL PROCESS OR NORMAL SUBSEQUENT SEQUENCE ACKNOWLEDGE SEQUENCE FIRST ALARM VISUAL ON INTERMITTENT lt VISUAL FLASHING AUDIBLE SILENT AUDIBLE AUDIBLE ABNORMAL FIRST OUT RESET PROSESS OR NORMAL WHILE ABNORMAL FIRST SEQUENCE ACKOWLEDGED ACKNOWLEDGE VISUAL SLOW FLASHING AUDIBLE SILENT SEQUENCE ISA AUTOMATIC RESET FIRST OUT WITHOUT FLASHING amp RESET PUSHBUTTON 4 o RTK SIL725 Safety Annunciator SEQUENCE TABLE PROCESS PUSHBUTTON SEQUENCE VISUAL ALARM LINE CONDITION OPERATION STATE DISPLAY DEVICES REMARKS 1 NORMAL NORMAL OFF SILENT INTERMITTENT 2 FIRST ABNORMAL FIRST ALARM AMENT AUDIBLE LOCK IN FAST 3 SUB ABNORMAL SUB ALARM FLASHING AUDIBLE LOCK IN FIRST OUT 4 FIRST RESET BEFORE TO LINE 3 4 ACKNOWLEDGE 5 ABNORMAL FIRST SLOW SILENT OR NORMAL ACKNOWLEDGED FLASHING ACKNOWLEDGE SUB MAINTAINED 6A SUB ABNORMAL SILENT ae MOMENTARY 6B SUB NORMAL TO LINE 8 RM 7A FIRST ABNORMAL FIRST OUT TO LINE 6A FIRST OUT RESET RESET AFTER 7B FIRST NORMAL ACKNOWLEDGE TO LINE 8 praes AUTOMATIC 8 NORMAL NORMAL OFF SILENT Cee SEQUENCE FEATURES Bom RETAINING THE FIRST OUT FLASHING INDICATION e SILENCE ACKNOWLEDGE RESET AND TEST PUSHBUTTONS ALARM AUDIBLE DEVICE LOCK IN OF MOMENTARY ALARMS UNTIL
44. L725 Annunciators use 2 x Alarm channels for every customer input with the left hand section of each window being driven by one alarm card and the right hand section being driven by a separate alarm card When using First Up sequences the quickest channel in the pair to respond will indicate First Up and the 274 channel will indicate as though it s a subsequent alarm This is normal as only one channel within the Annunciator can be considered as a First Up master and all consequential alarms will flash at a different alarm rate RTK SIL725 Safety Annunciator Three different first up sequences are available FO F2 and F3 as detailed below and in the following sequence tables FO The standard mode adopted by RTK Instruments which indicates the first up alarm by flashing at twice the rate of subsequent alarms F1 sequence F1 subsequent alarms appear acknowledged and there is no audible indication This sequence is not a compatible feature as it does not comply with our Safety Requirements Specification F2 In this mode all subsequent alarms do not flash they will however operate the audible device The acknowledge pushbutton will reset the first up indication F3 In this mode initial alarms appear with an intermittent flash rate and subsequent alarms flash at a steady rate On acknowledge subsequent alarms revert to the steady on state and only the first alarm continues to flash at a slower rate Please note auto reset and non lock
45. N MANUAL 3 ORAT ACKNOWLEDGE ACKNOWLEDGED ON SILENT RESET REQUIRED 4A ABNORMAL RESET TO LINE 3 4B NORMAL RESET NORMAL OFF SILENT MANUAL RESET SEQUENCE FEATURES 1 ACKNOWLEDGE RESET AND TEST PUSHBUTTONS 2 ALARM AUDIBLE DEVICE 3 LOCK IN OF MOMENTARY ALARMS UNTIL ACKNOWLEDGED 4 THE AUDIBLE DEVICE IS SILENCED AND FLASHING STOPS WHEN ACKNOWLEDGED 5 D MANUAL RESET OF ACKNOWLEDGED ALARM INDICATIONS AFTER PROCESS CONDITIONS RETURN TO NORMAL OPERATION TEST o 41 10 2 ISA Sequence A Automatic Reset RTK SIL725 Safety Annunciator SEQUENCE DIAGRAM PROCESS NORMAL SEQUENCE NORMAL RETURN VISUAL OFF TO NORMAL AUDIBLE SILENT PROCESS ABNORMAL SEQUENCE ACKNOWLEDGED ACKNOWLEDGE WHILE ABNORMAL TO ABNORMAL ACKNOWLEDGE WHILE NORMAL PROCESS ABNORMAL OR NORMAL SEQUENCE ALARM VISUAL ON AUDIBLE SILENT VISUAL FLASHING AUDIBLE AUDIBLE SEQUENCE ISA LOCK IN SEQUENCE TABLE ALARM PROCESS PUSHBUTTON SEQUENCE VISUAL LINE CONDITION OPERATION STATE DISPLAY DEVICES REMARKS 1 NORMAL NORMAL OFF SILENT 2 ABNORMAL ALARM FLASHING AUDIBLE LOCK IN MAINTAINED ABNORMAL ACKNOWLEDGE ACKNOWLEDGED ON SILENT SUM MOMENTARY 3B NORMAL ACKNOWLEDGE TO LINE 4 Hier AUTOMATIC 4 NORMAL NORMAL OFF SILENT RESET SEQUENCE FEATURES
46. O Module Wiring on AAR2 Type Alarm Module INPUT RELAY OUTPUTS 1 C 2 C NC NO Ri NC NO R2 CH AAR2 1 C NC NO R1 NC NO R2 OV OVC V VC 24VDC LOGIC SUPPLY Please Note SI O cards do not occupy the space of active alarm cards therefore units can be supplied fully populated RTK SIL725 Safety Annunciator 17 System Configurations Functions The SIL725 Annunciator is always supplied with a comprehensive range of pre defined options which can be enabled or disabled on a channel by channel basis using the integral or as an option remote pushbutton configuration module To simplify the configuration process each option has been allocated a unique Function No between 1 and 24 any combination of these functions can be selected for each alarm way but care must be taken to ensure the operating modes selected do not conflict with each other For example if ringback alarm sequence R is required the system should also be set to manual reset for the sequence to operate correctly The key for functions 1 to 24 is shown later in the m
47. RTK SIL725 Safety Annunciator Warning The SIL725 Safety Annunciator described herein operates on a logic voltage of 24VDC As standard 24VDC is used for the field contact supply voltage External power supplies using higher voltage AC DC primary sources and optional high voltage field contact voltages may be present If this is the case please ensure the necessary precautions are taken DATED DESCRIPTION AUTHOR APPROVED 2 06 05 09 Approved P Cartmell D Fishkin 05 06 09 Approved By SIRA P Cartmell P Reeve 4 1 09 08 09 Correct Function list P Cartmell D Fishkin Remove typographical errors 2 15 11 09 Update diagrams E Alexander P Hartley Add maintenance statement BB 03 10 Update labelling on back plate E dud P drawings 04 11 Clarify description of AD options ecd Alexander Ed Fishkin response times and audible board link 45 16 09 13 lifting and external PSU type A Ibbetson E Alexander 9 1O pl9unuuv LS SZZTIS RTK SIL725 Safety Annunciator RTK Instruments LTD 2008 The copyright in this work is vested in RTK Instruments Ltd and this document is issued for the purpose only for which it is supplied No licence is implied for the use of any patented feature It must not be reproduced in whole or in part or used for tendering or manufacturing purposes except under an agreement or with the consent in writing of RTK Instruments Ltd and then only on the condition that this notice is
48. Relays are available per SIL725 Annunciator 1 HNA Horn Relay 2 HNB Horn Relay B 3 GPA Group Relay A 4 GPB Group Relay B All of the safety relays are normally energised during normal conditions and will de energise in the alarm state The safe state of an output relay is when the relay is de energised Hence safety functions should always be designed so that the demand state is when the relay is de energised Any channel can be configured to operate any of the common safety relays within the SIL725 as required The output relays have normally open and normally closed contacts as typically shown for the HNA relay below Each relay card is equipped with two relays 1 Normally open contacts are internally wired in series as shown below 2 Normally closed contacts are available individually as this allows the user to wire duplicate feeds for increased reliability RELAY CONTACTS ms gt x S ceo SAFETY OUTPUT NO NC NC LI 0 U LL D In the majority of applications the normally open contact will be used to open a circuit when the safety function is demanded However in some applications a contact that closes when the safety function is demanded is required for example an external audible alarm SIL725 output relay cards provide two normally closed contacts that operate together To meet SIL2 safety requirement
49. T E mE ABNORMAL BEFORE SIL OR NORMAL ABNORMAL SILENCE FIRST SILENCED FLASHING SILENT MANUAL 7 SUB SILENCE ACKNOWLEDGE ON SILENT RESET REQUIRED ABNORMAL ACKNOWLEDGE FIRST OUT 8 FIRST ORNORMAL AFTER SILENCE TO LINE 7 RESET MANUAL 9 NORMAL RESET NORMAL OFF SILENT RESET SEQUENCE FEATURES PONS SILENCE ACKNOWLEDGE RESET AND TEST PUSHBUTTONS ALARM AUDIBLE DEVICE LOCK IN OF MOMENTARY ALARMS UNTIL ACKNOWLEDGED OPTION1 SILENCE PUSHBUTTON TO SILENCE THE ALARM AUDIBLE DEVICE WHILE RETAINING THE FIRST OUT FLASHING INDICATION e FLASHING INDICATION FOR FIRST ALARM ONLY NEW SUBSEQUENT ALARMS HAVE THE SAME VISUAL INDICATION AS ACKNOWLEDGED ALARMS CONDITIONS RETURN NORMAL 8 OPERATIONAL TEST FIRST OUT INDICATION IS RESET WHEN ACKNOWLEDGED MANUAL RESET OF ACKNOWLEDGED ALARM INDICATIONS AFTER PROCESS o 47 RTK SIL725 Safety Annunciator 10 6 ISA F3A Sequence Automatic Reset First Up SEQUENCE DIAGRAM PROCESS NORMAL SEQUENCE NORMAL FIRST TO RETURN ABNORMAL TO NORMAL gt VISUAL OFF SILENT ACKNOWLEDGE SUBSEQUENT TO WHILE NORMAL ABNORMAL ABNORMAL PROCESS OR NORMAL FIRST OUT RESET SUBSEQUENT 4 STATE ALARM lt oz VISUAL FAST FLASHING 32 8 2 mi AUDIBLE ON QE PROCESS ABNORMA
50. a repeat signal from each channel to be sent to third party devices as required Whilst this feature is available it is important to note that these relays are not safety related relays and have not been considered as part of the product certification and therefore they should not be used as part of the safety function The non alarm coil state of each relay can be set to be either FEATURE FUNCTION SETTING Normally energised Normally de energised The operation mode of each relay can be selected to be either Input Follower The individual relay will activate when an alarm occurs and automatically return to normal when the signal input returns to the normal state FEATURE FUNCTION SETTING 008 50 oO RTK SIL725 Safety Annunciator _ yNP 4 nIAW Y_D Logic Follower The individual relay will activate when an alarm occurs and only return to normal when the signal input has returned to the normal state and the logic has reset this may require the operator to press the associated pushbuttons to reset the alarm depending on the sequence selected FEATURE FUNCTION SETTING ZI Display Follower The individual relay will activate when an alarm occurs and faithfully mimic the state of the output drive to the associated lamp flashing on or off FEATURE FUNCTION SETTING Parise tones
51. ade the safety relays will remain un energised and the audible will sound during this period 4 If DTF is not made the Audible may sound for a short time when Alarm cards are being swapped RTK SIL725 Safety Annunciator 6 Technical Specifications The certified equipment shall be installed in accordance with the environmental specification stated by the manufacturer and any of the manufacturer s maximum ratings for the certified equipment shall not be exceeded FEATURES DETAILS Input type Each channel can be set to operate from either a normally open or normally put typ closed contact as required Stannard versinn 24VAC DC 9V to 33V Signal voltage Normally Closed 20k Ohm maximum series resistance Contact resistance PC Normally Open 50k Ohm minimum parallel resistance Contact current Typically 3mA Typically 35ms alternatives available on request Input protection Reverse polarity of the input supply put p Application of a 1000V megger tester between input and earth Options exist for fixed or adjustable input time delays Adjustable delays Input Delay AD1 user selectable from 5 to 50ms AD2 user selectable from 20ms to 2 seconds ADS user selectable from 5ms to 5 seconds Internal audible 3 5 kHz 95db A At 1 Metre distance complete with volume adjustment Functions as a slave of the HNA circuit Contacts rated Common relays 2 0 9 24VDC Inductive Load 4A 24VDC Resistive Load 0 3A 110VDC Inductive Load 1A
52. age before installing the unit into the control system If any damage has occurred please report the damage to the freight forwarder and copy RTK The alarm annunciator is supplied with panel mounting clamps locked in place however please check all packages to ensure that no additional pieces are left in the box as any auxillary items like power supplies horns pushbuttons or spares kits will be packed separately Please double check that all items listed on the packing list have been unpacked before disposing of any packing material Basic principles of handling There are some basic principles that everyone should observe prior to carrying lifting a large annunciator e Ensure that the object is light enough to lift is stable and unlikely to shift or move If the object is two heavy or awkward for one person to safely lift ask for help or use a handling aid Make sure the route is clear of obstructions Make sure there is somewhere to put the load down wherever it is to be moved to Stand as close to the load as possible and spread your feet to shoulder width Bend your knees and try and keep the back s natural upright posture Grasp the load firmly as close to the body as you can e Use the legs to lift the load in a smooth motion as this offers more leverage reducing the strain on your back e Carry the load close to the body with the elbows tucked into the body e Avoid twisting the body as much as possible by turning your feet
53. anual 17 1 Configuration Mode The configuration function of the unit is accessed by hinging down the pushbutton configuration module using a small terminal screwdriver in the recess in the top of the bezel and levering forward the top edge of the assembly This allows the assembly to hinge down to reveal the configuration information plate To configure the unit first place it in the configuration mode by moving the yellow switch to the CONF position the function display will indicate 0 to confirm that the unit can be set Removal of the Pushbutton Configuration Module TERMINAL _ SCREWDRIVER 4 a Z 7 A He TER RTK DEP RP ack RESET 4 UU POWER EP E 64 RTK SIL725 Safety Annunciator 0 17 2 Changing Function Setting Please note Configuration of a SIL725 Annunciator should only be carried out by authorised personnel using the SIL725 Instruction Manual When the pushbutton Configuration module has been hinged down and the CONF programme mode switch has been placed to the ON position the operation of the pushbuttons changes as indicated on the information plate on the underside of the unit as detailed below Configuration Information Plate Details FUNCTION 150 05
54. at are either normally open or normally closed However in safety related applications it is mandatory to use N C contacts fail safe Setting function F1 to the ON state conditions the input to accept a normally closed contact Please Note When AD option is requested see section 4 5 Input Time delay Option AD The alarm input should be set to normally closed using the switch SW2 located on each dual channel alarm card Function F1 in the configuration menu should be off 4 3 Typical Signal Supply Voltage On standard units an internally fused 24vdc signal supply VC derived from the 24VDC logic supply V is distributed to all of the common terminals marked C which are located to the right of each signal input terminal as typically shown below Typical Signal Supply Voltage Distribution Cy Typical signal inputs Typical signal inputs Li ss N Z x RLY DTF 1 2 1 2 u u 0 L 0 E T
55. ault See separate section detailing the function of the Low Voltage Lockout Relay Card h Whenever a change is made to the configuration a complete functional test of the system must be carried out to ensure that all safety functions are operating correctly i First up sequence F1 Configuration Setting F11 shall not be used j All SIL725 Annunciators should be powered via a general purpose single phase EMI filter See chapter 6 5 For more details on the type of filter which should be used 2 9 Certification The SIL725 is certified by Sira Certification Services using the CASS methodology for use in safety functions up to safety integrity level SIL2 The CASS methodology provides a framework for assessment and certification that is open consistent and traceable Traceable certification provides the end user with the assurance both that the product design complies with IEC 61508 and that the company has the necessary quality management systems to be able to manufacture the product in a repeatable and controlled manner 2 10 CASS The Conformity Assessment of Safety related Systems CASS methodology enables accredited third party certification bodies to offer consistent and transparent conformity assessment for safety related products and management systems that meet the requirements of IEC61508 RTK SIL725 Safety Annunciator 2 11 Proof Testing As specified in the limits of application the SIL725 should be subject to proof test dur
56. ble if individual channel repeat relays are fitted Option RLY 3 Functions F22 amp F24 are only available if additional Safety relays HNB and GPB have been fitted 4 Functions Labelled Not Supported are functions which if selected may not perform as intended and therefore should never be enabled 5 Functions Labelled Not Compatible are functions which should not be selected as they do not conform to the Safety Requirement Specification Rev 2 2 20 11 07 68 O RTK SIL725 Safety Annunciator 0 19 Function Descriptions Function numbers are used to describe pre defined features that can be enabled or disabled by the Customer as required F0 Contact Status Function FO allows each window in the annunciator to be illuminated if the associated signal contact is in the closed state This is normally used to help the user identify the current state of the input device from the front of the unit without disturbing plant wiring F1 normally open N O or normally closed N C signal input contact Each alarm input can be configured to allow operation from a N O or N C field contact In SIL applications normally closed contacts should be used to provide fail safe operations FEATURE F1 STATUS LED Set channel to operate from a normally open signal input contact Set channel to operate from normal
57. channel 1002 different input card Input channel 1002 Common cause Base failure rate Apy pmh 0 129 each input 0 013 Base failure rate Apu per year 1 13 x 10 each input 1 14x 107 PFD forT 1year 4 3 x 107 5 7 x 10 2 years 1 7 x 10 1 1 x 107 3 years 3 8 x 10 1 7 x 107 Motherboard power etc Safety relay output Base failure rate Apu pmh 0 009 0 002 Base failure rate Apu per year 7 88 x 10 1 75 x 10 PFD forT 1 year 3 9x 10 8 8x 10 2 years 7 9 x 10 1 8 x 10 3 years 1 2 x 10 2 6 x 10 See note at the end of this section 90 O RTK SIL725 Safety Annunciator ____ A nF T v h D n c y Po n o D r Single LED alarm window Internal audible Base failure rate Apu pmh 0 009 0 019 Base failure rate Apu per year 7 88 x 10 1 66 x 10 PFDforT 24 hours 14 x 10 2 3 x 10 1 week 7 6 x 107 1 6 x 10 1 month 3 3 x 10 6 9 x 10 6 months 2 0 x 10 4 2 x 10 1 year 3 9 x 10 8 3 x 10 The following tables show examples of the addition of the PFD figures to obtain the system PFD The following examples show how the above figures can be added to obtain the PFD of the complete SIL725 safety function The examples each relate to one of the three configurations described previously with the f
58. cknowledged by the operator at which the windows stop flashing and illuminate steadily The exact manner in which the SIL725 reacts to a sequence of alarms depends on the sequence programmed see Section 10 10 O RTK SIL725 Safety Annunciator 0 The diagram is intended to illustrate the basic features of the 511725 rather than to represent a particular implementation SIL725 systems are built using cells arranged in a matrix and so may be one of a range of possible sizes and hence number of channels Configuration is performed using the pushbutton configuration module which occupies the bottom right cell Configuration is enabled by prising the module away from the panel using a screwdriver to gain access to the configuration switch INPUT e nar sare CONTACTS P 1 RELAYS 7 RELAY OUTPUT TO OTHER EQUIPMENT ALARM CHANNEL PUSHBUTTON 2 MODULE INTEGRAL HORN SCOPE OF SIL725 SHOWN INSIDE THE DASHED LINES RTK SIL725 Safety Annunciator 2 4 Input Devices Standard P725 alarm annunciators are most often used with volt free contact input devices although voltage sourcing inputs may also be used as long as the user strictly adheres to the maximum input voltage range Voltage logic 1 t Volt free contact Voltage sourcing Input devices for the SIL725 will be of t
59. d regularly thereafter 2 13 Hardware Failure Rates Hardware failure rates and other information necessary for the use of the SIL725 are described later in this manual RTK SIL725 Safety Annunciator 3 System Description amp Features 3 1 General SIL725 Safety Annunciators are manufactured to meet individual customer s requirements using separate cells which can be assembled in configurations from 1 to 16 cells high and 1 to 16 cells wide as required The finished array is picture framed using standard lengths of aluminium extrusion Individual alarm channels can be displayed in one of two sizes as typically shown below Typical Large Window Version Typical Medium Window Version MEDIUM WINDOW LARGE OPTIONAL VERSION OPTIONAL WINDOW COMMON 30 X 60 mm COMMON VERSION SAFETY SAFETY 60 X 60 mm RELAY RELAY CELL CELL COMMON COMMON SAFETY SAFETY RELAY RELAY CELL CELL RTK RTI Cute POWER O POWER O 18 AYO RTK SIL725 Safety Annunciator 0 3 2 Window Colours Coloured filters can be used to identify alarm importance or alarm type for example Red filters can be used on Trip Alarms and Amber filters
60. d return to normal after pressing ACK and RESET h Access the Pushbutton Configuration module and enable the configuration feature Check through the configuration details to ensure no un authorised changes have been made and the configuration is correct please refer to the section on configuration within the manual for details i For each channel trigger an alarm by opening the alarm contact this can be done by simulating an alarm or triggering the alarm sensor depending on the application This should trigger the correct window sound the integral horn if configured de energise any configured horn relays and de energise any configured group relays j When each channel is triggered ensure the window colour and film legend is correct k Check that the diagnostic relay contacts are open when the SIL725 is unpowered 16 9 RTK SIL725 Safety Annunciator 0 2 12 Checklist Safety Related System Care must be taken to ensure the SIL725 is used correctly and in accordance with the certification this simple checklist can help identify any points not considered a Have the Limits of Applications been adhered to b Have the environmental limits been considered and adhered to in all operating conditions C Have the electrical limits been considered and adhered to in all operating conditions d Has a full proof test been undertaken successfully as above at installation an
61. d with all annunciator shipments RTK SIL725 Safety Annunciator 25 Spare Parts Description Only the manufacturer s recommended replacement parts shall be used within the SIL725 Annunciator Alarm Card Types There are 4 basic types of dual channel alarm CURRENT VERSIONS Plastic Case Annunciator Large and Medium window versions CB5674SIL1 T 2 Channel alarm card Located in the upper slot of the cell 2 Channel alarm card with repeat Large and Medium window versions ovdi Located in the upper slot of the cell Large and Medium window versions MESES T Located in the lower slot of the cell 2 Channel alarm card with repeat Large and Medium window versions COD IS d f Located in the lower slot of the cell Signal Supply Voltages All card types are supplied suitable for operation from 24VDC signal supply voltages The voltage levels are screen printed onto each card to indicate which version has been supplied Alarm cards plug into the rear of the annunciator and once inserted automatically connect to a pre tested LED display motherboard SPD Dual Card Assembly Supply And LVL Card Current Versions PART NO DESCRIPTION USED ON CB7080POP T s Pushbutton All SIL725 Annunciators Low Voltage Lock All SIL725 Annunciators Pushbutton Assembly Part no SIL725 TAR RTK LED version LED Assembly Part no P725LED XX where xx is the colour RD Red YW Yellow AM Amber WT White BL Blue GN Green 96
62. e in accordance with the selected sequence and additional pushbuttons will need to be pressed to step through the sequence and return the unit to its normal state Mute is used to silence the audible but allow the associated alarm window to continue to operate as per the selected sequence Acknowledge will silence the audible alarm and change the state of the associated window in accordance with the selected sequence Reset will return the alarm to the normal off state only if the unit has been acknowledged and the associated alarm contact has returned to its normal non alarm state First Reset is used after acknowledge to reset the flash sequence on the first alarm to occur within a defined group of alarms Once first reset has been pressed the next alarm to occur within the group will flash at the first up alarm rate 8 2 Audible Alarm Grouping Each channel within the annunciator can be set to operate the audible alarm relays as follows 1 HNA horn relay 2 HNB horn relay optionally fitted 3 HNA amp HNB horn relays 4 Neither of the horn relays Typically status only alarms Please note channels which are set to operate the HNA horn relay will automatically operate the internal horn 38 A O RTK SIL725 Safety Annunciator sss 9 Additional Features 9 1 Automatic Reset Once an alarm has been acknowledged and its input has returned to its normal state the alarm can be set to automatically reset without the ope
63. ecking please ensure that the removed component is marked with the complete unit serial number This is to ensure that component traceability is maintained 24 1 No Special Tools All normal maintenance and Configuration is carried out from the front of the annunciator without the use of special tools Filter and film legend changes and LED replacement are all undertaken by unclipping the front filter assembly 24 2 Removing Filter Assemblies See Section 3 4 24 3 Changing Film Legend See Section 3 4 24 4 Changing LED Assemblies After removal of the filter assembly the lamp holder will be visible The Test pushbutton can be pressed to ascertain if any LED s have failed The LED assemblies are removed using a pair of pliers on a small PCB connecting tag The LED s are not polarised so can be fitted in either orientation 4 o RTK SIL725 Safety Annunciator 24 5 Two fuses protect the overall system one protects the supply and motherboard 1 and the other protects the feed to the alarm contacts F2 These are both situated on the supply card which is fitted in the SPD module The location of the two fuses is shown below Take care to replace fuses with fuses of exactly the same type e Part No FU 10A 002 10 amp Logic Fuse e F2 PartNo FU 1A S01 1 amp Signal Supply Fuse Spare fuses are supplie
64. emove channel from the safety group relay GPB Set channel to operate the safety group relay GPB F23 Safety Horn A HNA Relay Each channel can be set to operate the safety horn relay using function F23 When set the alarm channel will activate the horn relay when an alarm occurs and the relay will remain active until the mute or acknowledge pushbutton has been pressed FEATURE F23 STATUS LED Remove channel from the safety horn relay HNA Set channel to operate the safety horn relay HNA F24 Safety Horn B HNB Relay optional Each channel can be set to operate the safety horn relay using function F24 When set the alarm channel will activate the horn relay when an alarm occurs and the relay will remain active until the mute or acknowledge pushbutton has been pressed FEATURE F24 STATUS LED Remove channel from the safety horn relay HNB Set channel to operate the safety horn relay HNB om RTK SIL725 Safety Annunciator 20 Alarm Card Address Settings Dual Channel Alarm Card Address and Output Drive Type Settings Before each card is placed within the annunciator a unique address No has to be set using the switches located on DIL switch SW1 which allows the Configuration module to communicate and pass Configuration instructions to and from the associated alarm channels When replacing an alarm card the switches on DIL Switch SW1 must be set to match the card that is being removed FUNCTION Set address Bit 1 Set addre
65. escriptions 1er serere seres ree 69 20 Alarm Card Address Settings J J 74 21 1 Set Output Drive to Operate With LED s seen 74 21 Adjustable Response Times J 79 22 Safety Calculations oria enses dr Rando 82 2221 Whats inthis Chapters abs i t P a Hee t RE C es 82 22 2 Modes of Operation n m feb eam eae ebbe 82 22 3 Single channel 10012 iui d ama edad p geo caper be ts 83 22 4 Two channel 1002 on the same input card seen 85 22 5 Two channel 1002 on the different input cards sse 87 22 6 Calculation of Probabilty of Failure on Demand sss 89 22 7 POO lOsts zi ci re eon ede t ef td eb bee e buts 89 22 8 Calculating PFD for each safety function sess esten 90 23 GOMMISSIONING cO IO S 93 24 MainterianCce erronee rrt exu o asus asua i re ce eui char ve cR 94 24 T NO Special T00lS Host URL E eqs 94 24 2 Removing Filter Assemblies eei nennen innen nnne 94 24 3 Changing Film Legend ie Doe ode Cen ee oops 94 24 4 Changing LED Assemblies
66. ety system 2 2 Second Tier Standards There are a number of sector specific standards now published known as second tier standards Two of these are relevant to the use of the SIL725 1 IEC61511 Safety Instrumented systems for the process sector Parts 1 3 2 EC61513 Nuclear Power plants Instrumentation and control important to safety General requirements for systems Being compliant to the generic IEC61508 standard will automatically mean that the SIL725 can be used as a component part of any system or process that needs to comply with these sector specific standards 2 3 Overview of the Safety System The SIL725 accepts inputs from volt free contacts such as pressure or level switches or contact outputs from trip amplifiers etc When an input is asserted an alarm window is illuminated and a horn sounds to alert the operator Relay contact outputs are also provided to pass the alarm signal onwards to other equipment These relay contacts are provided as group relays that may be associated with one or a number of inputs by configuring the SIL725 Each channel may optionally be fitted with a channel repeat relay If fitted channel repeat relays shall not be used in a safety function When a new alarm occurs the alarm window flashes to show the sequence in which a number of near simultaneous alarms occur the first alarm to occur in a group flashes in a different manner to subsequent alarms in the group Alarms may be a
67. fety function A single safety function uses one or more inputs some common parts of the SIL725 including the motherboard and power distribution one or more LED alarm windows and a safety output relay The HNA group also uses the internal audible too Consequently the failure rates for each safety function depend on the configuration used The following sections show how the failure rates are derived for 1001 and 1002 configurations and provide sufficient information for the user to derive failure rates for any configuration g _ RTK SIL725 Safety Annunciator O 22 3 Single channel 1001 Alarm input Motherboard Safety relay channel power output distribution etc 0 129 0 009 Apu 0 002 LED alarm window Apu 0 009 Internal audible HNA only Apu 0 019 The above figure shows the reliability block diagram for a 1001 safety function that is where a single input through a single alarm input channel is used There are three outputs that might be used as part of a safety function these are The safety group relay output GPA GPB HNA or HNB The LED alarm window For HNA only the internal audible The dangerous undetected failure rate Apu for each block is shown in units of failures per million hours pmh A dangerous undetected failure is defined as a failure that prevents the safety
68. hese general types as shown voltage sourcing devices or volt free contacts Input cards are configured to accept voltage sourcing or volt free inputs according to the rear panel wiring terminals used Alarm input contacts must be normally closed Open to alarm When volt free contacts are used the safety system designer must consider the potential impact of line faults on each safety function Dual redundant input devices may be used on a single safety function to improve the safety reliability For resilience against line failures voltage sourcing inputs should be configured so that the absence of a voltage asserts the safety function Signal conditioning devices such as trip amplifiers and proximity detector amplifiers may also be used to drive the SIL725 inputs Any input channel may be used for a safety related function Each alarm channel drives a dedicated alarm window Any channel or combinations of channels may be configured to drive one or more of the horn or group output relays The SIL725 itself meets SIL2 requirements with a single input channel 1001 However consideration of the safety integrity of the input devices and field wiring may require dual redundant inputs arranged in 1002 so that the safety function is demanded if either input is asserted 12 O RTK SIL725 Safety Annunciator 0 2 5 Common Safety Relays A maximum of 4 Common Safety
69. included in any such reproduction Information furnished is believed to be accurate but no liability in respect of any use of it is accepted by RTK Instruments Ltd RTK SIL725 Safety Annunciator 0 5 Ts a 7 1 4 Installation u rere roo pire ere reci ri ave roc cei cct 8 UnpBaCkKIhg fish it oct e A a u et ae rou Seen itum inteso 8 Basic principles OF handing u u su su be a ee a 8 Front View Exampl Ss onse narra aca 9 2 Functional 10 2 7 IEC 61508 esi ei Re o dE dread o Ded a eaaet e Doe Poe 10 2 2 Second Tier Standards sedie desire dene co He Duo ea Dane des 10 2 8 Overview of the Safety 5 2200002 1 220 0000000 10 2 4 Input DOVICOS die avis te o pite dee av dona De ake deal ie a ied 12 2 5 Common Salety R layS u i od ie eee c 13 2 6 Use of LED s and Horns in Safety Functions essen 14 2 7 Safety Description nit ode ab den eed dp dete
70. ing commissioning and then at regular intervals as necessary to achieve and maintain the required PFD probability of failure on demand It is highly recommended that a proof test is performed at least every three years It is also recommended that a basic System Test is performed at every shift change using the integral System Test facility especially if the internal horn or any alarm window is used as part of a safety function see proof section of this manual The proof test should normally include the following checks Before making any checks ensure it is safe to do so within the plant as output relays may be connected to sections of the instrumentation and safety system a Visual check of the product for any signs of misuse or environmental stress or damage that may cause the unit to operate outside specified limits b Ensure equipment is earthed correctly and all the customer connections are free from earth faults C Visually inspect all the wiring and connectors to ensure all wiring connections are secure and correctly wired d Check the 24VDC supply voltage is stable and within specified limits Press Lamp test and ensure all windows illuminate and the internal horn sounds f Press System Test to ensure all active windows flash and horn sounds in accordance with the programmed sequence press ACK and RESET to return to normal 9 Repeat this test and ensure the two group relays and two horn relays are de energised on test an
71. ll be illuminated c Alarm inputs shall be configured to assert on an open contact contact input or on a loss of input voltage voltage input d When an alarm input that is configured to drive horn relay Horn A is asserted the integral horn shall sound until muted or acknowledged e When an alarm input that is configured to drive an output relay Horn A Horn B Group A or Group B is asserted the relay shall de energise 1 Co RTK SIL725 Safety Annunciator 0 2 8 Limits of Application The following limits of application must be observed a The SIL725 is designed to have a 10 year lifetime The certified failure rates are valid only for this lifetime b Aregular proof test of the complete system must be performed see section 2 11 c The SIL725 must be operated within the specified environmental and electrical limits d Alarm contacts must be normally closed open to alarm e Relays must be energised in normal use and de energise on alarm f Loss of the power supply will prevent the internal horn sounding and the alarm windows illuminating The failure rate of the power supply must be taken into account if the internal horn or an alarm window is used as part of a safety function g Internal automatic diagnostic circuits monitor some important parts of the SIL725 The diagnostic must be set either to de energise the safety relays or to activate an external alarm on detection of a f
72. ly closed signal input contact When using Customer Adjustable Response Time option AD Function F1 should be set to OFF and Switch SW2 located on each 2 channel alarm card should be used to set the inputs to normally closed as described later in the manual F2 Individual Channel Output Relay State This feature is only available if individual channel repeat relays option RLY are fitted to the annunciator FEATURE F2 STATUS LED Set individual channel repeat relay to be normally energised in non alarm state FF Set individual channel repeat relay to be normally de energised in non ON alarm state F3 Manual Or Automatic Reset Acknowledged alarms can be set to manual reset where the operator must press the reset pushbutton to clear the alarm after the input has returned to normal or acknowledged alarms can be set to automatic reset which allows the alarm to automatically clear as soon as the input returns to normal FEATURE F3 STATUS LED Set channel to manual reset Set channel to automatic reset F4 Lock In or Non Lock In Operation Not a compatible with SIL725 annunciator F5 Ringback Sequence Q7 0 RTK SIL725 Safety Annunciator Ringback sequence is used to inform the operator that an acknowledged alarm has returned to normal When an acknowledged alarm returns to normal the associated window will slow flash to indicate to the operator that the alarm can be reset FEATURE F5 STATUS LED Set channel to ringback
73. m input 0 033 0 0 034 0 101 channel 1 Alarm input 0 033 0 0 034 0 101 channel 2 Alarm input 0 100 0 019 0 046 0 229 channel common parts Motherboard 0 009 0 0 027 0 096 power distribution etc Safety relay 0 002 0 2 415 4 242 output LED alarm 0 009 0 0 002 0 009 window 1 LED alarm 0 009 0 0 002 0 009 window 2 LED alarm 0 001 0 0 0 window common cause Internal audible 0 019 0 0 008 0 020 HNA only Total 0 019 2 568 4 807 86 n 9 RTK SIL725 Safety Annunciator 0 22 5 Two channel 1002 on the different input cards The following figure shows the reliability block diagram for a 1002 safety function in which two inputs are fed into two separate alarm input cards This is very similar to the previous case with the subtle difference that there are no common parts shared between the two input channels The dangerous undetected failure rate for each alarm input channel is therefore the same as for single channel 1001 An allowance is made for common cause failures that might cause both alarm input cards to fail in the same manner CARD 1 Alarm input channel 1 Alarm input Motherboard channel power common cause distribution etc failures CARD 2 Alarm input Apu 0 013 Apu 0 009 channel 1 Apy 0 129 Safety relay output LED alarm window Apu 0 002 1 LED alarm window common cause failure
74. nd to meet the safety requirements but RTK recommends that the full proof test interval does not exceed 3 years In the following calculations the following symbols are used T Proof test interval for full proof test T Lamp and internal audible test 22 8 Calculating PFD for each safety function The PFD for each safety function is calculated by summing the PFDs of the sections in the chain from the input device to the output device The SIL725 forms part of the safety function and the preceding reliability block diagrams reflect the architecture of the SIL725 These diagrams can be used as an aid to calculating the PFD for any safety function using the SIL725 RTK SIL725 Safety Annunciator The following tables give PFDs for the 1001 and 1002 configurations previously described The formulae used are PFD 2 3 for parallel voted 1002 elements PFD AT 2 for series elements Alarm input channel 1001 Base failure rate Apy pmh 0 129 Base failure rate Apy per year 1 13 x 10 1 year 5 7 x 107 2 years 14 x10 3 years 12710 Alarm input channel 1002 same input card Input channel 1002 Common parts Base failure rate Apy pmh 0 033 each input 0 100 Base failure rate Apu per year 2 89 x 10 each input 8 76 x 10 1 year 2 8 x 10 4 4 x 107 2 years 14 x 10 8 8 x 107 3 years 25x10 1 3 x 10 Alarm input
75. ngle units System sharing is not covered by the safety requirements specification and is not supported for SIL725 annunciators Power Connections RELAY OUTPUTS 1 C 2 C NC NO Ri NC NO R2 CH AAR2 1 C 2 C NC NO Ri NC NO R2 OV OVC V VC 24VDC LOGIC SUPPLY 62 0 RTK SIL725 Safety Annunciator _ SS 16 Power Distribution Power Distribution on Large Annunciator Units Systems greater than 48 cells are equipped with a minimum of one SI O supply card to allow the user to distribute the logic supply load and avoid excessive current being passed through the motherboard The first 48 cells in the annunciator are powered from the SPR module in the normal way Each SI O card is designed to power a maximum of 16 cells in larger applications multiple SI O cards will therefore be present With systems up to 62 cells the logic supply is factory wired between the SPR and SI O cells however on systems over 62 cells it is necessary to power the SPR and SI O cells using separate feed wires due to the higher currents required Typical SI
76. nnel Motherboard 0 009 0 0 027 0 096 power distribution etc Safety relay 0 002 0 2 415 4 242 output LED alarm 0 009 0 0 002 0 009 window Internal audible 0 019 0 0 008 0 020 HNA only Total 0 168 0 019 2 533 4 70 All failure rates are given in units of failures per million hours pmh The failure rates are defined as e pu dangerous undetected failure rate Failures that can prevent the safety function being asserted on demand that are not detected by internal diagnostics e App dangerous detected failure rate Failures that can prevent the safety function being asserted on demand that are detected by internal diagnostics e Aspunious Spurious failure rate Failures that cause the safety function to assert without a demand being present e Agu safe undetected failure rate Failures that either cause the safety function to assert without a demand being present or have no effect on the safety function includes AsPunious 84 RTK SIL725 Safety Annunciator _ N D a T lt v v YM 22 4 Two channel 1002 on the same input card The following figure shows the reliability block diagram for a 1oo2 safety function in which two inputs are fed into the two channels of a single alarm input card The two inputs may be connected to a single input device or where higher integrity is required to two input devices monitoring the same process condition
77. not required Set channel to ringback sequence Please note Function F3 F4 must be set to the off state for ringback sequence to function correctly F6 Reset Pushbutton Optional Function If required the reset pushbutton can be used for both acknowledge and reset FEATURE F6 STATUS LED Set channel to allow acknowledge amp reset pushbuttons to operate independently Set channel to allow the reset pushbutton to be used for acknowledge amp B reset F7 Input Reflash Re Alarm On Manual Reset Sequences Input reflash is used to inform the operator that an acknowledged alarm waiting to be Reset has returned to normal and re alarmed FEATURE F7 STATUS LED Set Channel To Disable Input Reflash Set Channel To Enable Input Reflash F8 Common Safety Relay Group A Reflash Function Not compatible with SIL725 Annunciators F9 Common Safety Relay Group B Reflash Function Not supported on SIL725 Annunciators F10 First Up Sequence FO This feature is used to enable first up sequence FO on individual channels as required FO sequence will enable slow flash on subsequent alarms Full sequence tables are provided in Section 10 FEATURE F10 STATUS LED Set channel to first up sequence FO not required Set channel to first up sequence FO required F11 First Up Sequence F1 Not compatible with SIL725 Annunciators O RTK SIL725 Safety Annunciator
78. ollowing assumptions e The proof test interval is one year e internal audible the LED alarm window and a safety relay output are all required as part of the safety function The LED alarm windows and the internal audible are tested once a week using the LAMP TEST button e For simplicity the PFD for a single LED alarm window is used rather than calculate for two LED alarm windows When tested weekly PFD is insignificant N B These examples are provided to illustrate how to derive the PFD of the SIL725 part of the safety function and will not be correct for other configurations and proof test intervals It is the user s responsibility to derive the correct system PFD for his particular application Single channel 1001 safety function PFD Alarm input channel 1001 5 7 x 107 Motherboard power etc 3 9 x 10 Safety relay output 8 8 x 10 Single LED alarm window 7 6 x 10 Internal audible 1 6 x 10 Total for SIL725 part of this safety 6 2 x 107 function Two channel 1002 safety function using the same input card PFD Alarm input channel 1002 same input card 2 8 x 10 Alarm input channel common parts 4 4 x 107 Motherboard power etc 3 9 x 10 Safety relay output 8 8 x 10 Single LED alarm window 7 6 x 10 Internal audible 1 6 x 10 Total for SIL725 part of this safety 4 9 x 107 function RTK SIL725 Safety Annunciator T
79. or 23 Commissioning A qualified technician properly trained and authorised to work with this type of equipment should carry out commissioning and servicing operations The following procedure is a summary of the steps normally taken when installing an alarm system This is the absolute minimum requirement and will generally be supplemented by a number of additional checks relating to the particular application and installation STEP FUNCTION Check all external customer connections to the annunciator are free from earth faults Ensure the annunciator has been correctly earthed using appropriate sized cable Check that all customers wiring added during installation is secure and correctly wired Press the system test pushbutton to check that all active alarm channels flash and the audible alarm sounds in accordance with the programmed sequence Press the remaining pushbuttons required to control the programmed sequence Refer to the section on Configuration and check that all of the required functions have been correctly set Initialise each channel one by one from the field device to check that the laser printed film legend and filter colour matches the associated process Apply a 24vdc logic supply and check that the power on LED illuminates correctly gt 93 RTK SIL725 Safety Annunciator 24 Maintenance Should it be necessary to remove any component part of the SIL725 Safety Annunciator for testing or ch
80. orner of the cell as shown below On systems with channels configured to activate either the HNA or optional HNB audible relays it is important to note that the internal audible will only operate on channels configured to operate the HNA relay see Function F23 A Jumper link LK1 is provided to enable disable the horn during Lamp Test The default position will enable the horn during Lamp Test LK1 is located to the lower left side of the horn Integral Horn Volume Adjustment Location Increase al Intemal audible volume adjustment 23 RTK SIL725 Safety Annunciator 3 11 Remote Pushbutton Inputs Remote pushbuttons can be connected to the SIL725 SPD module in addition to the integral pushbuttons or to allow multiple annunciators to share common pushbuttons for example a common mute pushbutton mounted in the operator desk console The pushbuttons should be of the normally open momentary type and it is recommended that if long cable runs are required through electrically noisy environments a screened cable is used with the screen connected to a suitable instrument earth at one end only Please note When the annunciator is in the configuration mode with the CONF switch in the ON position all integral or remote pushbutton inputs are disabled until the unit has been returned to its normal operating state Remote Pushbutton Wiring RLY DTF
81. ount Protects the signal supply voltage feed to the common C terminals RTK SIL725 Safety Annunciator 6 4 Suitable Power Supplies A suitable power supply would have over volts protection with safety shut off Limited to 31 volts or switch over to second power unit Note IEC 61010 compliance requires the annunciator external power supply to be compliant to EN61010 or EN60950 6 5 General Purpose EMI Filter Unit should be fitted with a General Purpose single phase EMI filter with attenuation high performance The filter should be suitable for the intended environment whilst meeting the following requirements Technical Specifications Maximum Continuous Operating voltage 250VAC 50 60Hz Operating Frequency DC 400Hz Current Rating Current rating should be suitable for the size of annunciator Up to a maximum of 10A Temperature Range operation and Storage 25 C to 85 C 25 85 21 The filter used should conform to the following Harmonised standards e EN133200 e UL1283 General Purpose EMI Filter Typical Electrical Schematic LIVE 224 LIVE cy LINE xm L cx L p EARTH LOAD i di L NEUTRAL NEUTRAL A suitable filter can be supplied on request 4 o RTK SIL725 Safety Annunciator 6 6 SIL725 Safety Annunciators The table below indicates the maximum numbers of alarm channels that can be connected to a standard power supply
82. r the GPA Safety Relay Card 3 1xcellis required for the HNB Safety Relay Card 4 1xcellis required for the GPB Safety Relay Card Although relay cards look identical each function requires a dedicated card with redundant relays and the specific function is determined by a single zero ohm link Safety Relay board with HNA Function RL2 RL1 HNB GPB 28 O RTK SIL725 Safety Annunciator 0 EXTERNAL HORN e HORN SUPPLY NIC 5 RELAY CONTACTS Rear view of typical SIL Safety Relay Cell 5 1 Horn Relay A HNA Each channel can be set to operate the HNA horn relay as required When an alarm occurs the horn relay will change state and remain in the alarm condition until the MUTE or ACK pushbutton has been pressed Please note Channels set to operate the HNA horn relay will also operate the integral audible alarm 5 2 Horn Relay B HNB optional Each channel can be set to operate the HNB horn relay as required When an alarm occurs the relay will change state and remain in the alarm condition until the MUTE or ACK pushbutton has been pressed Please note Channels set to opera
83. rator having to press the reset pushbutton 9 2 Non Latch Sequence No Lock In Not recommended for SIL Safety Annunciators 9 3 Reflash Feature Not a compatible feature on the SIL725 annunciators 9 4 Ringback Sequence Ringback sequence is used to visually inform the operator that an alarm condition has cleared and the channel can be reset to its normal off state When a contact returns to normal the associated window will flash at approx 1 2 the speed of a normal alarm This identifies the specific alarm and allows the operator to reset as soon as the process has returned to normal Please note ringback cannot function if a channel is set to auto reset or non lock in 9 5 Two Pushbutton Operation In certain circumstances using remote pushbuttons it may be desirable to use only two pushbuttons reset and lamp test The reset pushbutton is used to acknowledge an alarm if the contacts are in the alarm condition and to reset it if the contacts are clear 9 6 First Up Sequences When monitoring devices with interlinked functions such as a turbine or compressor it is often important to know the specific alarm that occurred first as it will invariably result in cascade of secondary alarms This allows the operator to focus on the root cause of failure and therefore limits the downtime and associated costs This is achieved by having the first up alarm flashing in a different manner compared to the subsequent alarms IMPORTANT NOTE SI
84. re tested to ensure that the operation is in line with the required functions The Configuration process includes an inbuilt comprehensive error checking routine In applications where there is extreme electrical noise 66 O RTK SIL725 Safety Annunciator 0 this may result in the program not being accepted If this happens simply repeat the process for that particular alarm channel 18 Function No Key and Descriptions If units are supplied with unarmed alarm channels it is necessary to jump over these missing cards addresses to access the next channel General Description The SIL725 is equipped with numerous pre defined features that can be simply enabled or disabled on a per channel basis as required Functions numbers are assigned to each feature for ease of selection Feature and Function Key STATUS LED NERA closed pen closed Relay non alarm state energised de energised Reset function Reset reset Enable Set repeat relays to follow logic 8 Disable Enable Set repeat relays to follow input F19 Disable Enable Enable Enable Enable Enable RTK SIL725 Safety Annunciator NOTE 1 The functions marked with the are the default settings if no configuration is requested with the order 2 Functions F2 F18 amp F19 are only availa
85. s Apu 0 009 LED alarm window 0 001 2 Apu 0 009 Internal audible HNA only Apu 0 019 The following table lists all the failure rates for the 1002 configuration using different input cards TT 37 RTK SIL725 Safety Annunciator Aspurious Asu Alarm input 0 129 0 019 081 0 333 channel 1 Alarm input 0 129 0 019 0 081 0 333 channel 2 Alarm input 0 013 0 002 channel common parts Motherboard 0 009 0 0 027 0 096 power distribution etc Safety relay 0 002 0 2 415 4 242 output LED alarm 0 009 0 0 002 0 009 window 1 LED alarm 0 009 0 0 002 0 009 window 2 LED alarm 0 001 0 0 0 window common cause Internal audible 0 019 0 0 008 0 020 HNA only Total 0 040 2 616 5 042 88 n AO oO RTK SIL725 Safety Annunciator 60 22 6 Calculation of Probabilty of Failure on Demand When a safety function is used in an on demand mode the safety reliability is expressed as an average probability of failure on demand or PFD This is the probability that the safety function will not perform if a demand occurs perhaps because a failure has caused it to be stuck in its normal state The PFD depends on the dangerous undetected failure rate together with the proof test interval A proof test checks that the safety function is working correctly and so the more freq
86. s the two contacts must either be wired in parallel or wired separately to the equipment being controlled so that either contact closing will demand the safety function Separate wiring provides some resilience to breaks in the wiring RTK SIL725 Safety Annunciator 2 6 Use of LED s and Horns in Safety Functions The LED s and the internal horn may be used in a safety function However users should understand that the human operator responding to the LED s or horn is then an element in the safety function The reliability of human operators responding to safety alarms is questionable especially if there is not much time for the operator to consider his actions before the process becomes dangerous Consequently the use of human operators as a link in the safety function should be considered very carefully 2 7 Safety Description It is essential that the SIL725 is used correctly within a safety related system hence the functional safety description is defined very clearly and this is included in the certificate The details are as follows The SIL725 will provide an alarm system which when used as specified will provide functional safety as defined below a The SIL725 may be used in low demand or high demand safety functions up to SIL2 in which the safe state and the demand state is with the output relays de energised b alarm contact opening or loss of signal voltage on an input channel the related alarm window wi
87. s etc Selection of features is on a per channel basis with no special tools required All configurations are carried out from the front of the unit using the integral pushbutton configuration module which allows changes to be easily made during commissioning or at a later date after the equipment has been installed Alarm cards are fully interchangeable within the Annunciator Reliability of operation is increased over conventional Annunciators as each alarm card is fitted with its own application specific integrated circuit ASIC which is capable of complete system control During initial power up one of the alarm cards will automatically act as a master controller with regards to flash rates etc and in the event that this card fails or is removed another card will automatically take over the role of master controller Each Annunciator can be supplied with a maximum of four integrally mounted safety relays which can be used to provide 2 x horn outputs and 2 x common alarm group outputs Additional options exist for more complex requirements including signal duplicating relays and user selectable time delays per channel Accessibility for normal maintenance LED changes legend filter changes and configuration is accomplished from the front of the panel without the use of special tools RTK SIL725 Safety Annunciator 1 1 Installation Unpacking Once the item has been unpacked please visually examine the unit for any signs of transit dam
88. s requested Each channel is equipped with a switch SW2 which allows the user to select if e The return to normal state should have the same delay as the alarm activation e The return to normal state as soon as the input returns to normal When using AD options the user must use SW2 to set the normally open or normally closed input state as detailed in chapter 21 of this manual Function F1 should be set to OFF when using SW2 as described in Section 24 of this manual Please note The CRT and AD option should be specified at the time of ordering RTK SIL725 Safety Annunciator 11 7 SPD Module Supply Pushbutton Module All Series SIL725 annunciators are equipped with 24VDC Logic If external AC DC or DC DC Power supplies are required they should be capable of handling the maximum surge current which is typically twice the maximum load when all LED windows are on steady 11 8 Logic Power Connections In standard applications a power supply with a single 24VDC output can be wired to the 24VDC logic power by connecting to terminals OV and V on the rear of the SPD Module 11 9 Signal Supply Voltage Connections In standard applications the logic supply terminals OV and V can be cross linked to the signal supply input terminals OVC and VC on the SPD module to provide 24VDC to distribute to the associated field contacts OV links to OVC and V links to VC s 2 RTK SIL725 Safety Annunciator
89. ss Bit 2 Set address Bit 3 SW 1 4 Set address Bit 4 SW1 5 Set address Bit 5 SW1 6 Set address Bit 6 SW 1 7 Set address Bit 7 21 1 Set Output Drive to Operate With LED s As all SIL725 units are fitted LED s SW1 8 should always remain off Fit amp forget LED assemblies SW1 8 OFF RTK SIL725 Safety Annunciator 2 0 21 2 Alarm Card DIL Switch SW1 Address Settings E ADDRESS S Si misi snn a 0 0000000 OFF OFF OFF OFF OFE OFF OFF ON OFF ON OFF ON OFF ON OFF ON 10 OFF 11 ON 12 OFF 13 ON 14 OFF 15 ON 16 OFF 17 ON 18 OFF 19 ON 20 OFF 21 ON 22 OFF 23 ON 24 OFF 25 ON 26 OFF 27 ON 28 OFF 29 ON 30 OFF 31 ON 32 OFF 33 ON 34 OFF 35 ON 36 OFF 37 ON 38 OFF 39 ON RTK SIL725 Safety Annunciator Alarm Card DIL Switch SW1 Address Settings 41 To 80 ADDRESS 64 32 ON 42 OFF 43 ON 44 OFF 45 ON 46 OFF 47 ON 48 OFF 49 ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON 70 OFF 71 72 OFF 73 ON 74 OFF 75 ON 76 OFF 77 78 OFF 79 ON 80 1010000 ON OFF ON OFF OFF OFF OFF 76 O RTK SIL725 Safety Annunciator 0 Alarm DIL Switch SW1 Address Settings 81 To 120 ADDRESS 54 32 to 4 12 1 OFF ON OFF ON OFF ON OFF ON OFF 91 ON 92 OFF
90. te the HNB horn relay will not operate the integral audible alarm 5 3 Group Relay A GPA Each channel can be set to operate the GPA relay as required When an alarm occurs the relay will change state and remain in the alarm condition until all alarms in the group have returned to normal and the logic has been reset 5 4 Group Relay B GPB optional Each channel can be set to operate the GPB relay as required When an alarm occurs the relay will change state and remain in the alarm condition until all alarms in the group have returned to normal and the logic has been reset RTK SIL725 Safety Annunciator 5 5 Common Safety Relay Function Codes FEATURE DESCRIPTION FUNCTION SETTING HNA hom relay enable HNB hom relay erable GPA group relay erai GPB group relay enable Please note HNA and GPA safety relays require 2 x dedicated cells within the annunciator This is normally provided in the cells above the pushbutton module If additional safety relays are required for horn relay HNB and or group relay GPB 2 x additional dedicated cells would be provided within the annunciator for this purpose The optional HNB and GPB Safety Relays must be specified at time of order 3d NH RTK SIL725 Safety Annunciator 5 6 Low Voltage Lockout LVL Board In SIL725 Alarm Annunciators additional self diagnostic functionality is added via a Low Voltage Lockout
91. the process is going from normal to active state but when the process returns to normal there is no delay The feature is activated using switch SW2 DM on the alarm card 4 6 Input Wiring Segregation Field contacts are often great distances from the annunciator it is therefore advisable to run the contact cables separately from circuits carrying heavy currents and or high voltages to minimise the effects of induced voltages 4 7 No Master Module Each dual channel alarm card is equipped with a dedicated application specific integrated circuit ASIC System control is automatically allocated to one of the alarm cards during power on and if this card is removed damaged or fails apart from catastrophic failure another card will automatically take over the common control functions This method of operation eliminates the need for a traditional style common services control module and removes common failure points thus increasing reliability RTK SIL725 Safety Annunciator 5 Common Safety Relay Outputs On SIL725 Alarm Annunciators a maximum of 4 Common Safety Relays can be used to provide the following functions 1 HNA Horn Relay 2 GPA Group Relay 3 HNB Horn Relay B 4 GPB Group Relay B Dedicated cells are required within the Annunciator to house the associated relay cards Fitted as standard Fitted as standard Optional Optional 1 1xcellis required for the HNA Safety Relay Card 2 1xcellis required fo
92. tion tool to configure the required features on the annunciator To access the Configuration functions the pushbutton fascia must be hinged down to reveal a configuration switch labelled CONF located on the inner face of the assembly Once the unit is in the CONF mode the user is able to enable or disable a range of pre defined features and options The dual function pushbutton assembly allows the user to enable any of the embedded features ona per channel basis without having to remove power from the annunciator remove light boxes back planes or alarm cards All configured information is stored in EEPROM with minimum 20 year retention giving repeatability and reliability without the need for battery backup Note Alarm sequences will operate in accordance with any of the standard sequences defined in the ISA publication Alarm Sequences and Specifications 518 2 1979 R1985 22 O RTK SIL725 Safety Annunciator _ _ _ T F N h oO0 gt O0O A Ns I 3 10 Integral Audible Alarm Each annunciator is equipped with an internal 3 5kHz 95dB A audible located behind the integral pushbutton module The audible is supplied with an adjustable volume control using a single turn potentiometer The potentiometer can be accessed by hinging down the integral pushbutton module using a small flat blade screwdriver in the slot of the surround bezel The potentiometer is located in the top right hand c
93. uently a proof test is carried out the lower the probability that the safety function will have failed when a demand occurs The following paragraphs describe a way of calculating the PFD for the configurations shown in the preceding sections It must be understood that this is given for guidance only and is not intended as a cookbook method of designing safety functions Safety systems should be designed by competent staff with the necessary knowledge in accordance with the principles of IEC61508 local regulations and site specific requirements 22 7 Proof tests There are two proof tests possible with the SIL725 At intervals of generally a year or more a full test should be carried out to verify the correct operation of all safety functions This will generally involve the SIL725 being taken off line and so could conveniently be carried out during a planned maintenance shutdown Alternatively temporary measures could be put in place to safeguard the operation of the process while the SIL725 is taken off line so that the process can continue uninterrupted Pressing lamp test will cause all LED alarm windows to illuminate and the internal audible to sound None of the output relays will change state This can be regarded as a partial proof test that should generally be carried out much more frequently for example weekly or daily or even every shift change The frequency of proof testing should be determined to suit the application a
94. wo channel 1002 safety function using different input cards PFD Alarm input channel 1002 different input 4 83 x 107 cards Alarm input channel common cause 5 7 x 10 Motherboard power etc 3 9 x 10 Safety relay output 8 8 x 10 Single LED alarm window 7 6 x 107 Internal audible 1 6 x 10 Total for SIL725 part of this safety 1 1 x 107 function Note concerning the formulae used to derive PFD The formulae used in the PFD calculation examples differ from the formulae and methods shown in IEC 61508 6 B 2 2 1 and B 2 2 2 in that they treat the dangerous detected failures as safe failures This is justified as 1 The failure rate for failures detected by diagnostics is small compared to the other failure rates The diagnostic coverage is small 2 The SIL725 is normally configured so that failures detected by diagnostics cause the safety function to go to its safe state relays de energised which is normal for a safe failure If the SIL725 is configured such that the diagnostic relay output is used to annunciate an equipment failure rather than to put the safety function into a safe state then it may be necessary to use more complex PFD calculations 3 Therefore the error incurred using the simplified formula is small 4 The total PFD of each safety function is likely to be dominated by the PFD of the input devices and final elements further reducing the effect of any error RTK SIL725 Safety Annunciat
95. xternally generated signal supply voltage via a fuse to all of the common terminals within the annunciator marked C to allow connection to customer signal contacts Systems Using Isolated Logic and Signal Supplies TYPICAL SIGNAL INPUTS RLY DTF 1 2 SUPPLY 24VDC SPD OV OVC V VC T A ST M FR INTERNAL Oo 1A SIGNAL SUPPLY FUSE EXTERNALLY GENERATED 24VDC LOGIC SIGNAL SUPPLY VOLTAGE o 59 RTK SIL725 Safety Annunciator Systems Using Powered Inputs In circumstances where the Annunciator is connected to equipment with volt sourcing outputs there is need to use a common feed for signal supply If the powered output voltage is 24VAC DC then the standard Annunciator can be used without modification The external OV common is connected to OVC and the powered outputs connect directly to the alarm input terminals 24VDC POWERED INPUTS RLY DTF 1 2 ID ID SUPPLY 24VDC SPD OV OVC V VCT A RST
96. y 3 Use FIRST RESET RESET pushbuttons to select function reset function 4 Use the SYST TEST LAMP test pushbuttons to select channel 7 and note the associated window will fast flash 5 Use the MUTE ACK pushbuttons to enable function which is confirmed when the status LED is on 6 Scroll to the next channel up or down to store the required setting using the SYST TEST LAMP TEST pushbuttons 7 Return to normal operation by placing the CONF switch to the off state 17 4 Checking Configuration Settings After all of the required functions have been set on the unit it is recommended that the user checks the configuration to avoid problems during the commissioning stage This is a simple process that should only take a few minutes and is achieved by placing the unit into the CONF mode and scrolling through each channel noting that as each Function is selected the status LED is on if enabled or off if disabled When functions such as F23 HNA Horn Relay are selected all windows selected to operate the relay are illuminated in a steady on state to help the user identify which alarms are within the horn group Please note A window selected for Configuration automatically fast flashes therefore the window of the channel that is being configured cannot be viewed to determine status information The status LED on the information plate can be used as an alternative to view the setting for this channel if the status LED is on the function

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