3SK2112-2AA10

**3SK2112-2AA10** 

**Data sheet** 

SIRIUS safety relay basic unit 3SK2 series 10 F-DI, 2 F-DQ, 1 DQ, 24 V DC Can be parameterized via SIRIUS Safety ES 22.5 mm overall width spring-loaded terminal (push-in) up to SIL 3 (IEC 62061) up to performance level e (ISO 13849-1) output expansions 3SK1, coupling relay 3RQ1 and fail-safe motor starters 3RM1 via device connector connectable 

|**product brand name**|SIRIUS|
|---|---|
|**product category**|Safetyrelay|
|**product designation**|Base-Unit|
|**design of theproduct**|10 F-DI, 2 F-DQ, 1 DQ|
|**suitability for use for monitoring of optoelectronic**|Yes|
|**protective devices according to IEC 61496-1**||
|**suitability for use**||
|● monitoringof floatingsensors|Yes|
|● monitoringof non-floatingsensors|Yes|
|●position switch monitoring|Yes|
|● EMERGENCY-OFF circuit monitoring|Yes|
|● valve monitoring|Yes|
|● opto-electronicprotection device monitoring|Yes|
|● magneticallyoperated switch monitoring|Yes|
|●proximityswitch monitoring|Yes|
|● safety-related circuits|Yes|
|**General technical data**||
|**product function**||
|● EMERGENCY STOP function|Yes|
|●protective door monitoring|Yes|
|●protective door monitoringwith tumbler|Yes|
|● muting, 2 sensor-parallel|Yes|
|● muting, 4 sensor-parallel|Yes|
|● muting, 4 sensor-sequential|Yes|
|● monitoring parameterizable|Yes|
|● evaluation: electro-sensitiveprotective equipment|Yes|
|● evaluation: selector switch|Yes|
|●pressure-sensitive mat monitoring|Yes|
|● evaluation: two-hand operatorpanel|Yes|
|● evaluation: enablingswitch|Yes|
|● monitored start-up|Yes|
|● two-hand control accordingto EN 574|Yes|
|**configuration software required**|Yes; SafetyES V1.0 and higher|
|**number of function blocks typical**|50|
|**insulation voltage rated value**|50 V|
|**degree ofpollution**|3|
|**surge voltage resistance rated value**|800 V|
|**protection class IP**||
|● of the enclosure|IP20|



3SK21122AA10 Page 1/6 

Subject to change without notice © Copyright Siemens 

5/31/2026 

|● of the terminal|IP20|
|---|---|
|**shock resistance**|15g/ 11 ms|
|**vibration resistance according to IEC 60068-2-6**|5 ... 500 Hz: 0.75 mm|
|**operating frequency maximum**|2 000 1/h|
|**reference code according to IEC 81346-2**|F|
|**Substance Prohibitance(day/month/year)**|05/28/2009|
|**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|
|**Net Weight**|0.197 kg|
|**product function suitable for AS-i Power24V**|No|
|**product function diagnostics with CTT2 device**|No|
|**Ambient conditions**||
|installation altitude at height above sea level maximum|4 000 m|
|**ambient temperature**||
|● duringoperation|-25 ... +60 °C|
|● duringstorage|-40 ... +80 °C|
|● duringtransport|-40 ... +80 °C|
|relative humidityduringoperation|10 ... 95 %|
|air pressure accordingto SN 31205|90 ... 106 kPa|
|**Electromagnetic compatibility**||
|EMC emitted interference accordingto IEC 60947-1|class A|
|**conducted interference**||
|● due to burst accordingto IEC 61000-4-4|2 kV(powerports)/ 1 kV(signalports)|
|**field-based interference according to IEC 61000-4-3**|10 V/m|
|**electrostatic discharge according to IEC 61000-4-2**|4 kV contact discharge / 8 kV air discharge|
|**Safety related data**||
|**test wear-related service life necessary**|No|
|**diagnostics test interval by internal test function maximum**|1 000 s|
|**stop category according to IEC 60204-1**|0 / 1|
|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**||
|● accordingto IEC 62061|1E-8 1/h|
|ISO 13849||
|performance level(PL)accordingto EN ISO 13849-1|e|
|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|
|**device type according to ISO 13849-1**|1|
|**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|
|**PFHD with high demand rate according to IEC 61508**|1E-8 1/h|
|PFDavgwith low demand rate accordingto IEC 61508|1.5E-5|
|**Safe failure fraction (SFF)**|99 %|



3SK21122AA10 Page 2/6 

Subject to change without notice © Copyright Siemens 

5/31/2026 

|**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|
|**Inputs/ Outputs**||
|**product function**||
|●parameterizable inputs|Yes|
|●parameterizable outputs|Yes|
|● at the digital outputs short-circuitprotection|Yes|
|**number of inputs**||
|● safety-related|10|
|● non-safety-related|0|
|**input delay time**|0 ... 150 ms|
|**type of digital inputs according to IEC 60947-1**|Type 1|
|**ingress aquisition time at digital input maximum**|60 ms|
|**input delay time at digital input maximum**|150 ms|
|input voltage at digital input at DC rated value|24 V|
|**input current at digital input**||
|● for signal <1> typical|2.6 mA|
|**number of outputs**||
|● safety-related 2-channel|2|
|● for testingcontact-based sensors|2|
|number of outputs as contact-affected switching element safety-<br>related||
|● 1-channel|0|
|● 2-channel|0|
|**number of outputs as contact-less semiconductor**<br>**switching element**||
|● safety-related 2-channel|2|
|● non-safety-related|1|
|**design of the contactless switching element safety-related**|Ppotential|
|**recovery time of the safe outputs**|0 ms|
|**readback time maximum**|400 ms|
|**light testperiod**|3 ms|
|**darkperiod of the common drivers**|3 ms|
|switching capacity current of semiconductor outputs at DC-13 at<br>24 V|4 A|
|**residual current**||
|● maximum|0.1 mA|
|● at digital output with signal <0> maximum|0.1 mA|
|**total current maximum**|6.5 A|
|voltage dropmaximum|0.5 V|
|**wire length of the signal cable**||
|● to the inputs||
|— shielded maximum|1 000 m|
|— unshielded maximum|600 m|
|● to the outputs||
|— shielded maximum|1 000 m|
|— unshielded maximum|600 m|
|**Communication/ Protocol**||
|**protocol optional is supported**||
|● PROFIBUS DPprotocol|Yes; when usingthe DP interface module; 64 bit cyclical data|
|● PROFINET IOprotocol|Yes; when usingthe PN interface module; 64-bit cyclic data|
|protocol is supported AS-Interface protocol|No|



3SK21122AA10 Page 3/6 

Subject to change without notice © Copyright Siemens 

5/31/2026 

|**Control circuit/ Control**<br>~~|~~|**Control circuit/ Control**<br>~~|~~|**Control circuit/ Control**<br>~~|~~|**Control circuit/ Control**<br>~~|~~|**Control circuit/ Control**<br>~~|~~|**Control circuit/ Control**<br>~~|~~|**Control circuit/ Control**<br>~~|~~|
|---|---|---|---|---|---|---|
|**type of voltage**||DC|||||
|**control supply voltage rated value**||24 V|||||
|**operating range factor control supply voltage rated value at**|||||||
|**DC**|||||||
|● initial value||0.85|||||
|● full-scale value||1.2|||||
|**inrush currentpeak**|||||||
|● at 24 V||10 A|||||
|**duration of inrush currentpeak**|||||||
|● at 24 V<br>~~re~~||1 ms|||||
|**operating power rated value**||2.5 W|||||
|**Installation/ mounting/ dimensions**|||||||
|**mounting position**||any|||||
|**fastening method**||Snap-mounted to DIN rail or screw-mounted with additionalpush-in lug|||||
|**height**||100 mm|||||
|**width**<br>~~ee~~||22.5 mm|||||
|**depth**||124.5 mm|||||
|**Connections/ Terminals**|||||||
|**product function removable terminal**||Yes|||||
|**type of electrical connection**||spring-loaded terminal(push-in)|||||
|**type of connectable conductor cross-sections**|||||||
|● solid||1x(0.5 ... 1.5 mm²||0.5 ... 1.5 mm²), 2x(0.5 ... 1.5 mm²)|||
|● finelystranded with core endprocessing||1x(0.5 ... 1.0 mm²||0.5 ... 1.0 mm²), 2x(0.5 ... 1.0 mm²)|||
|● for AWG cables solid||1x(20 ... 16), 2x||, 2x(20 ... 16)|||
|● for AWG cables stranded||1x(20 ... 16), 2x||, 2x(20 ... 16)|||
|connectable conductor cross-section finely stranded with core||0.5 ... 1 mm²|||||
|endprocessing|||||||
|**AWG number as coded connectable conductor cross**|||||||
|**section**|||||||
|● solid||20 ... 16|||||
|● stranded||20 ... 16|||||
|**Approvals Certificates**<br>~~ee~~|||||||
|**Environment**<br>**General Product Approval**||||||**EMV**|
|Environmental Con-<br>firmations<br>~~—~~<br>@<br>“fA||||Se|cg|[G|
|**EMV**<br>**Functional Saftey**<br>**Test Certificates**||**other**|||||
|Type Examination Cer-<br>tificate<br>Type Test Certific-<br>ates/Test Report<br>Confirmation<br>Confirmation<br>**Further information**<br>**Information on the packaging**<br>~~re~~<br>~~OO~~<br>~~—C™SCSC“‘CSCOC:C‘isCs~~|||||||
|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=3SK2112-2AA10|||||||
|**Cax online generator**|||||||
|https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3SK2112-2AA10|||||||
|**Service&Support (Manuals, Certificates, Characteristics, FAQs,...)**|||||||
|https://support.industry.siemens.com/cs/ww/en/ps/3SK2112-2AA10|||||||
|**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)**||||**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)**|||
|https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3SK2112-2AA10&lang=en|||||||



3SK21122AA10 Page 4/6 

Subject to change without notice © Copyright Siemens 

5/31/2026 

**==> picture [461 x 356] intentionally omitted <==**

**----- Start of picture text -----**<br>
-K<br>24V+<br>|<br>|<br>|<br>|<br>|<br>|<br>|<br>|<br>|<br>Logic<br>X1 | |<br>|<br>|<br>|<br>|<br>| |<br>|<br>|<br>|<br>|<br>| - |<br>|<br>last modified: 4/4/2026<br>A1+ T1 F-IN1 F-IN3 F-IN5 F-IN7 F-IN9 T2 F-IN2 F-IN4 F-IN6 F-IN8 F-IN10<br>SYS<br>FE A2-<br>F-Q1 F-Q2 QM1<br>**----- End of picture text -----**<br>


3SK21122AA10 Page 5/6 

Subject to change without notice © Copyright Siemens 

5/31/2026 

3SK21122AA10 Page 6/6 

Subject to change without notice © Copyright Siemens 

5/31/2026