Intrinsic Safety Modules Selection Guide

1 Selection GuideOriginal InstructionsIntrinsic Safety ModulesBulletin Numbers 937TS, 937TH, 937CS, 937CU, 937ZH, 937A2 Rockwell Automation Publication 937-SG001F-EN-P - May 2021 Intrinsic Safety Modules Selection GuideWhat s InsideTo p i cPageIsolated Barriers3 Converter Barriers43 Zener Barriers63 Accessories74 Rockwell Automation Publication 937-SG001F-EN-P - May 20213 Isolated BarriersIsolated BarriersWith galvanic optical or transformer isolation, these Modules provide an interface within the Intrinsic Safety circuit that is electrically separated from the control system. A key advantage of isolated barriers is that they do not require a ground between the module and the intrinsically safe device. Available in mm ( in) and 20 mm ( in) AmplifiersSwitch Amplifiers are used to transfer digital signals (NAMUR sensors/mechanical contacts) from a hazardous area to a safe area.

2 Select Modules are available with relay output or transistor output, in addition to signal splitters. A unique collective error messaging feature is available when used with the Power Rail system. Due to its compact housing design and low heat dissipation, this device is useful for detecting positions, end stops, and switching states in space-critical Current DriversSMART Current Drivers drive SMART IP converters, electrical valves, and positioners in hazardous Transmitter Power SuppliesSMART Transmitter Power Supplies supply 2-wire SMART transmitters in a hazardous area, and can also be used with 2-wire SMART current sources. They transfer the analog input signal to the safe area as an isolated current value. Modules with splitter feature provide two isolated output DriversSolenoid Drivers supply power to solenoids, light-emittininlocated in a hazardous RepeatersTemperature Repeaters transfer RTD resistance values from hazardous areas to safe areas.

3 A 2-, 3-, or 4-wire mode is available depending on the required accuracy. The monitor registers the same load as if it were connected directly to the resistance in a hazardous Automation Publication 937-SG001F-EN-P - May 2021 Isolated BarriersCatalog Number ExplanationNote: Examples that are given in this section are for reference purposes. This basic explanation should not be used for product Selection ; some combinations may not produce a valid catalog DISAR KD1abc deabcModule ProfileI/O TypeFunctionalityCodeDescriptionCodeDesc riptionCodeDescriptionHHigh-density mm moduleDIDigital InSARS witch Amplifier with Relay OutputSStandard 20 mm moduleDODigital OutSRSS witch Amplifier with Relay Output, SplitterAIAnalog InSATS witch Amplifier with Transistor OutputAOAnalog OutSTSS witch Amplifier with Transistor Output, SplitterSNDS olenoid DriverTXPSMART Transmitter, Power SupplyTXSSMART Transmitter, Power Supply, SplitterRRPR epeater.

4 Resistance MeasuringSCDSMART Current DriverdePowerChannelsCodeDescriptionCode DescriptionIPInput Loop Powered1 Single ChannelDC24V DC2 Dual DC / ACKD115V ACKF230V ACRockwell Automation Publication 937-SG001F-EN-P - May 20215 Isolated BarriersSwitch Amplifier, Relay Output2-ch, 115V AC937TS-DISAR-KD2 2-channel isolated barrier 115V AC supply Dry contact or NAMUR inputs Relay contact output Line fault detection (LFD) Reversible mode of operation Up to SIL 2 according to IEC 61508 / IEC 61511 This isolated barrier is used for Intrinsic Safety applications. It transfers digital signals (NAMUR sensors/mechanical contacts) from a hazardous area to a safe area. The proximity sensor or switch controls a form C changeover relay contact for the safe area load. The normal output state can be reversed using switches S1 and S2.

5 Switch S3 is used to enable or disable line fault detection of the field circuit. During an error condition, the relays revert to their de-energized state and the light-emitting diode (LEDs) indicate the fault according to NAMUR AC, 2-channelSignal typeDigital input, relay outputSupplyConnectionterminals 14, 15 Rated AC , HzPower WPower consumption WInputConnectionterminals 1+, 2+, 3-; 4+, 5+, 6-Rated valuesaccording to EN 60947-5-6 (NAMUR)Open circuit voltage / short-circuit currentapprox. 8V DC / approx. 8 mASwitching point / switching mA / approx. mALine fault detectionbreakage I mA, short-circuit I >6 mAPulse / pause ratio 20 ms / 20 msOutputConnectionoutput I: terminals 7, 8, 9;output II: terminals 10, 11, 12 Output Isignal; relayOutput IIsignal; relayEnergized / de-energized delayapprox.

6 20 ms / 20 msElectrical lifeSeeMaximum Switching Power of Output Contacts on page 7 Transfer characteristicsSwitching frequency 10 HzElectrical isolationInput / outputreinforced insulation according to IEC/EN 61010-1,rated insulation voltage 300 VeffInput / power supplyOutput / power supplyOutput / outputDirective conformityElectromagnetic compatibilityDirective 2004 / 108 / ECEN 61326-1:2006 Low voltageDirective 2006 / 95 / ECEN 61010-1:2010 ConformityElectromagnetic compatibilityNE 21:2006 Protection degreeIEC 60529:2001 InputEN 60947-5-6:20006 Rockwell Automation Publication 937-SG001F-EN-P - May 2021 Isolated Barriers937TS-DISAR-KD2 Environmental and Mechanical SpecificationsOperating +60 C ( +140 F)Protection degreeIP20 Weightapprox. 150 g ( lb)Dimensions20 x 119 x 115 mm ( x x in)Mountingon 35 mm DIN mounting rail according to EN 60715:2001 Data for application in connection with Ex-areasGroup, category, type of protectionEx II (1) G [Ex ia] IIC, II (1) D [Ex ia] IIICI nput[Ex ia] IIC, [Ex ia] IIICV oltage mAPower Po51 mW (linear characteristic)SupplyMaximum safe voltage ACProduct FeaturesOutputContact loading253V AC / 2 A / cos > ; AC / 4 A / cos >.

7 40V DC / 2 A resistive loadMaximum safe voltage Um253V ACElectrical isolationInput / outputsafe electrical isolation according toIEC/EN 60079-11, voltage peak value 375 VInput / power supplyDirective conformityDirective 94 / 9 / ECEN 60079-0:2009, EN 60079-11:2007,EN 61241-11:2006 Note: Maximum safe voltage is not rated DimensionsWiring Diagram13462513151291071411812 OUT CHK PWRS2S1S3 IIIF ront viewLED yellow:Relay output ILED red:LB/SC channel ILED yellow:Relay output IILED red:LB/SC channel IISwitch S3(LB/SC-monitoring) LED green:Power supplyRemovable terminalsblack Removable terminalsblue Switch S1(Mode of operation channel I) Switch S2(Mode of operation channel II) 20 mm( ")115 mm ( '')==107 mm ( '')93 mm ( '')2+3-1+Zone 0, 1, 2 Div. 1, 2789101112 IIIIII5+6-4+230 V AC141510 k 10 k 400 W R 2 kW10 k 10 k 400 W R 2 kWRockwell Automation Publication 937-SG001F-EN-P - May 20217 Isolated BarriersMaximum Switching Power of Output Contacts937TS-DISAR-KD2 ConfigurationIMPORTANTM echanical life: 107 switching cycles.

8 For applications that require higher switching cycles consider the switch amplifier product with transistor positionOperating statusFactory settings: switch 1, 2 and 3 in position I FunctionFunctionSPositionPosition1 Mode of operationMode of operationOutput I (relay)Output I (relay)energizedenergizedwith high input currentwith high input currentIwith low input currentwith low input currentIIII2 Mode of operationMode of operationOutput II (relay)Output II (relay)energizedenergizedwith high input currentwith high input currentIwith low input currentwith low input currentIIII3 Line fault detectionLine fault detectionONONIOFFOFFIIIIC ontrol circuitControl circuitInput signalInput signalInitiator high impedance /Initiator high impedance /contact openedcontact openedlow input currentlow input currentInitiator low impedance /Initiator low impedance /contact closedcontact closedhigh input currenthigh input currentLead breakageLead breakagelead short-circuitlead short-circuitLine faultLine fault1I (A)24401003050200115253U (V)

9 Automation Publication 937-SG001F-EN-P - May 2021 Isolated BarriersSwitch Amplifier, Relay Output2-ch, 230V AC937TS-DISAR-KF2 2-channel isolated barrier 230V AC supply Dry contact or NAMUR inputs Relay contact output Line fault detection (LFD) Reversible mode of operation Up to SIL 2 according to IEC 61508 / IEC 61511 This isolated barrier is used for Intrinsic Safety applications. It transfers digital signals (NAMUR sensors/mechanical contacts) from a hazardous area to a safe area. The proximity sensor or switch controls a form C changeover relay contact for the safe area load. The normal output state can be reversed using switches S1 and S2. Switch S3 is used to enable or disable line fault detection of the field circuit. During an error condition, the relays revert to their de-energized state and the light-emitting diode (LEDs) indicate the fault according to NAMUR AC, 2-channelSignal typeDigital input, relay outputSupplyConnectionterminals 14, 15 Rated AC, HzPower WPower consumption WInputConnectionterminals 1+, 2+, 3-; 4+, 5+, 6-Rated valuesaccording to EN 60947-5-6 (NAMUR)Open circuit voltage / short-circuit currentapprox.

10 8V DC / approx. 8 mASwitching point / switching mA / approx. mALine fault detectionbreakage I mA, short-circuit I >6 mAPulse / pause ratio 20 ms / 20 msOutputConnectionoutput I: terminals 7, 8, 9;output II: terminals 10, 11, 12 Output Isignal; relayOutput IIsignal; relayEnergized / de-energized delayapprox. 20 ms / 20 msElectrical lifeSeeMaximum Switching Power of Output Contacts on page 10 Transfer characteristicsSwitching frequency 10 HzElectrical isolationInput / outputreinforced insulation according to IEC/EN 61010-1,rated insulation voltage 300 VeffInput / power supplyOutput / power supplyOutput / outputDirective conformityElectromagnetic compatibilityDirective 2004 / 108 / ECEN 61326-1:2006 Low voltageDirective 2006 / 95 / ECEN 61010-1:2010 ConformityElectromagnetic compatibilityNE 21:2006 Protection degreeIEC 60529:2001 InputEN 60947-5-6:2000 Rockwell Automation Publication 937-SG001F-EN-P - May 20219 Isolated Barriers937TS-DISAR-KF2 Environmental and Mechanical SpecificationsOperating +60 C ( +140 F)Protection degreeIP20 Weightapprox.