3SK1111-2AW20

**3SK1111-2AW20** 

**Data sheet** 

||SIRIUS safety relay Basic unit Standard series Relay enabling circuits 3 NO<br>contacts plus Relay signaling circuit 1 NC contact Us = 110 - 240 V AC/DC 50/60<br>Hz Spring-type terminal (push-in)|
|---|---|
|**product brand name**|SIRIUS|
|**product category**|Safetyrelays|
|**product designation**|safetyrelays|
|**design of theproduct**|Relayenablingcircuits|
|**product type designation**|3SK1|
|**product line**|Standard basic unit|
|**Product Function**<br>~~|~~||
|**product functionparameterizable**<br>~~|~~|Sensor floating/ monitored start / automatic start<br>~~|~~|
|**product function**||
|● automatic start|Yes|
|● light barrier monitoring|No|
|●protective door monitoring|Yes|
|● magneticallyoperated switch monitoringNC-NO|No|
|● magneticallyoperated switch monitoringNC-NC|Yes|
|● laser scanner monitoring|No|
|● light arraymonitoring|No|
|● EMERGENCY OFF function|Yes|
|● monitored start-up|Yes|
|●pressure-sensitive mat monitoring|No|
|**product feature cross-circuit-proof**|Yes|
|**suitability for interactionpress control**|No|
|**suitability for operation device connector 3ZY12**|No|
|**suitability for use**||
|● monitoringof floatingsensors|Yes|
|● monitoringof non-floatingsensors|No|
|●position switch monitoring|Yes|
|● EMERGENCY-OFF circuit monitoring|Yes|
|● opto-electronicprotection device monitoring|No|
|● magneticallyoperated switch monitoring|No|
|● safetyswitch|Yes|
|● safety-related circuits|Yes|
|**General technical data**<br>~~|~~||
|certificate of suitabilityUL approval<br>~~|~~|Yes<br>~~|~~|
|**power loss[W] maximum**|2.5 W|
|**insulation voltage rated value**|300 V|
|**degree ofpollution**|3|
|**overvoltage category**|3|
|**surge voltage resistance rated value**|4 000 V|
|protection class IP of the enclosure|IP20|
|**shock resistance**|10g/ 11 ms|
|**vibration resistance according to IEC 60068-2-6**|5 ... 500 Hz: 0.75 mm|
|**operating frequency maximum**|360 1/h|
|**reference code according to IEC 81346-2**|F|
|**Substance Prohibitance(day/month/year)**|11/05/2012|
|**SVHC substance name**|Lead CAS-No. 7439-92-1<br>Lead monoxide (lead oxide) CAS-No. 1317-36-8<br>2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one CAS-No. 71868-<br>10-5<br>Melamine CAS-No. 108-78-1<br>6,6'-di-tert-butyl-2,2'-methylenedi-p-cresol CAS-No. 119-47-1|



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||4,4'-isopropylidenediphenol(Bisphenol A, BPA)CAS-No. 80-05-7|
|---|---|
|**Net Weight**|0.243 kg|
|**Ambient conditions**||
|installation altitude at height above sea level maximum|4 000 m|
|● note|Derating, see Product Notification 109792701|
|**ambient temperature**||
|● duringoperation|-25 ... +60 °C|
|● duringstorage|-40 ... +80 °C|
|relative humidityduringoperation|10 ... 95 %|
|air pressure accordingto SN 31205|900 ... 1 060 hPa|
|**Electromagnetic compatibility**||
|**installation environment regarding EMC**|This product is suitable for Class A environments only. In household<br>environments, this device can cause unwanted radio interference. The user is<br>required to implement appropriate measures in this case.|
|**EMC emitted interference**|IEC 60947-5-1, Class A|
|**Safety related data**||
|product function suitable for safetyfunction|Yes|
|**safe state**|Safetyoutputs switched off|
|**test wear-related service life necessary**|Yes|
|**function test interval maximum**|1 a|
|**stop category according to IEC 60204-1**|0|
|IEC 62061||
|SIL Claim Limit(subsystem)accordingto EN 62061|3|
|**Safety Integrity Level(SIL)**||
|**● according to IEC 62061**|SIL 3|
|● at single-channel evaluation accordingto IEC 62061|1|
|● at 2-channel evaluation accordingto IEC 62061|3|
|**PFHD with high demand rate according to IEC 62061**|0,0000000015|
|ISO 13849||
|categoryaccordingto EN ISO 13849-1|4|
|**performance level(PL)**||
|**● according to ISO 13849-1**|PL e|
|● at single-channel evaluation accordingto ISO 13849-1|c|
|● at 2-channel evaluation accordingto ISO 13849-1|e|
|**category**||
|**● according to ISO 13849-1**|4|
|● at 2-channel evaluation accordingto ISO 13849-1|4|
|**overdimensioning according to ISO 13849-2 necessary**|No|
|IEC 61508||
|**Safety Integrity Level(SIL)**||
|● accordingto IEC 61508|3|
|● at single-channel evaluation accordingto IEC 61508|1|
|● at 2-channel evaluation accordingto IEC 61508|3|
|**safety device type according to IEC 61508-2**|Type A|
|**Safe failure fraction(SFF)**|99 %|
|**hardware fault tolerance**||
|● accordingto IEC 61508|1|
|● at single-channel evaluation accordingto IEC 61508|0|
|● at 2-channel evaluation accordingto IEC 61508|1|
|**T1 value**||
|● of service life accordingto IEC 61508|20 a|
|● for proof test interval or service life according to IEC<br>61508|20 a|
|Electrical Safety||
|**touch protection against electrical shock**|finger-safe|
|**Short-circuit protection**||
|**design of the fuse link**||
|● for short-circuit protection of the NO contacts of the relay<br>outputs required|gL/gG: 6A or circuit breaker type A: 3A or circuit breaker type B: 2A or circuit<br>breaker type C: 1A|
|● for short circuit protection of the NC contacts of the relay|Diazed or Neozed fuses, operating class gL/gG: 6 A or MCB type A: 2 A or|



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|outputs required|MCB type B: 2 A or MCB type C: 1 A|
|---|---|
|**Inputs**||
|**design of input**||
|● cascadinginput/functional switching|No|
|● feedback input|Yes|
|● start input|Yes|
|pulse duration of the sensor input minimum|150 ms|
|number of sensor inputs 1-channel or 2-channel|1|
|**Outputs**||
|**number of outputs as contact-affected switching element**||
|● as NC contact||
|— for signalingfunction instantaneous contact|1|
|● as NO contact||
|— safety-related instantaneous contact|3|
|— safety-related delayed switching|0|
|**mechanical service life(operating cycles) typical**|10 000 000|
|**thermal current of the switching element with contacts**<br>**maximum**|5 A|
|**switching capacity current of the NO contacts of the relay**<br>**outputs at DC-13**||
|● at 24 V|5 A|
|● at 115 V|0.2 A|
|● at 230 V|0.1 A|
|**switching capacity current of the NO contacts of the relay**<br>**outputs at AC-15**||
|● at 115 V|5 A|
|● at 230 V|5 A|
|**switching capacity current of the NC contacts of the relay**<br>**outputs at DC-13**||
|● at 24 V|1 A|
|● at 115 V|0.2 A|
|● at 230 V|0.1 A|
|**switching capacity current of the NC contacts of the relay**<br>**outputs at AC-15**||
|● at 24 V|2 A|
|● at 115 V|1.5 A|
|● at 230 V|1.5 A|
|**total current maximum**|12 A|
|**operational current at 17 V minimum**|5 mA|
|**Times**||
|**make time with automatic start**||
|● typical|110 ms|
|● at DC maximum|130 ms|
|● at AC maximum|130 ms|
|**make time with automatic start afterpower failure**||
|● typical|110 ms|
|● maximum|130 ms|
|**make time with monitored start**||
|● typical|15 ms|
|● maximum|15 ms|
|**backslide delay time after opening of the safety circuits**<br>**typical**|10 ms|
|**backslide delay time in the event ofpower failure**||
|● typical|200 ms|
|● maximum|300 ms|
|**recovery time after opening of the safety circuits typical**|10 ms|
|**recovery time afterpower failure typical**|0.32 s|
|**pulse duration**||
|● of the ON pushbutton input minimum|0.015 s|
|**Control circuit/ Control**||



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|**type of voltage of the control supply voltage**|AC/DC|
|---|---|
|**control supply voltage at AC**||
|● at 50 Hz rated value|110 ... 240 V|
|● at 60 Hz rated value|110 ... 240 V|
|**control supply voltage frequency**||
|**● 1 rated value**|50 Hz|
|**● 2 rated value**|60 Hz|
|**control supply voltage at DC rated value**|110 ... 240 V|
|**operating range factor control supply voltage rated value of**||
|**magnet coil at DC**||
|● initial value|0.85|
|● full-scale value|1.1|
|**operating range factor control supply voltage rated value of**||
|**magnet coil at AC**||
|● at 50 Hz|0.85 ... 1.1|
|● at 60 Hz|0.85 ... 1.1|
|**Installation/ mounting/ dimensions**<br>~~ee~~||
|**mounting position**|any|
|**fastening method**|screw and snap-on mounting|
|**height**|100 mm|
|**width**|22.5 mm|
|**depth**|121.5 mm|
|**required spacing**||



● for grounded parts at the side 5 mm 

~~a~~ **Connections/ Terminals type of electrical connection** spring-loaded terminal (push-in) **wire length** ● for total of all sensor circuits with Cu 1.5 mm² and 150 2 000 m nF/km maximum **type of connectable conductor cross-sections** ● solid 1x (0.5 ... 1.5 mm²), 2x (0.5 ... 1.5 mm²) ● finely stranded with core end processing 1x (0.5 ... 1.0 mm²), 2x (0.5 ... 1.0 mm²) ● finely stranded without core end processing 1x (0.5 ... 1.5 mm²), 2x (0.5 ... 1.5 mm²) ● for AWG cables solid 1x (20 ... 16), 2x (20 ... 16) ● for AWG cables stranded 1x (20 ... 16), 2x (20 ... 16) **type of electrical connection plug-in socket** No 

|**Approvals Certificates**<br>~~ee~~|**Approvals Certificates**<br>~~ee~~|**Approvals Certificates**<br>~~ee~~|**Approvals Certificates**<br>~~ee~~|**Approvals Certificates**<br>~~ee~~|**Approvals Certificates**<br>~~ee~~|
|---|---|---|---|---|---|
|**Environment**||**General Product Approval**||||
|Environmental Con-||||||
|firmations||||||
|**General Product Ap-**<br>**proval**|**EMV**||**Functional Saftey**|**Test Certificates**|**Maritime application**|
||||Type Examination Cer-|Type Test Certific-||
||||tificate|ates/Test Report||
|**Maritime application**|||**other**|||
|2|||Confirmation<br>~~—~~|Confirmation||



**Railway** 

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Confirmation 

|**Further information**|||
|---|---|---|
|**Information on the packaging**|||
|https://support.industry.siemens.com/cs/ww/en/view/109813875|||
|**Information for data generation and storage**|||
|https://support.industry.siemens.com/cs/ww/en/view/109995012|||
|**Information- and Downloadcenter (Catalogs, Brochures,…)**|||
|https://www.siemens.com/ic10|||
|**Industry Mall (Online ordering system)**|||
|https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=3SK1111-2AW20|||
|**Cax online generator**|||
|https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3SK1111-2AW20|||
|**Service&Support (Manuals, Certificates, Characteristics, FAQs,...)**|||
|https://support.industry.siemens.com/cs/ww/en/ps/3SK1111-2AW20|||
|**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)**|||
|https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3SK1111-2AW20&lang=en|||
|**last modified:**|5/26/2026|G|



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