3TK2810-1KA41

**3TK2810-1KA41** 

**Data sheet** 

SIRIUS safety relay Safety-oriented Speed monitoring 110-240 V AC/DC, 45 mm overall width Screw terminal EC instantaneous: 2 NO EC delayed: 0 SC: 2 electrical Auto-start/manual start Basic device Maximum achievable PL according to EN 13849-1: e Maximum achievable SIL according to IEC 61508: 3 

||SIRIUS safety relay Safety-oriented Speed monitoring 110-240 V AC/DC, 45 mm<br>overall width Screw terminal EC instantaneous: 2 NO EC delayed: 0 SC: 2<br>electrical Auto-start/manual start Basic device Maximum achievable PL according<br>to EN 13849-1: e Maximum achievable SIL according to IEC 61508: 3|
|---|---|
|**product brand name**|SIRIUS|
|**product designation**|Speed monitor|
|**design of theproduct**|standstill and speed monitoring|
|**product type designation**|3TK28|
|**Product Function**<br>~~|~~||
|**product function**<br>~~|~~|~~|~~|
|● automatic start|Yes|
|● light barrier monitoring|No|
|● standstill monitoring|Yes|
|●protective door monitoring|Yes|
|● magneticallyoperated switch monitoringNC-NO|No|
|● magneticallyoperated switch monitoringNC-NC|No|
|● rotation speed monitoring|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 use**||
|● monitoringof floatingsensors|Yes|
|● monitoringof non-floatingsensors|No|
|●position switch monitoring|Yes|
|● EMERGENCY-OFF circuit monitoring|No|
|● valve monitoring|No|
|● opto-electronicprotection device monitoring|No|
|● tactile sensor monitoring|No|
|● magneticallyoperated switch monitoring|No|
|●proximityswitch monitoring|Yes|
|● safetyswitch|Yes|
|● safety-related circuits|Yes|
|**General technical data**<br>~~|~~||
|certificate of suitabilityUL approval<br>~~|~~|Yes<br>~~|~~|
|**insulation voltage rated value**|300 V|
|**surge voltage resistance rated value**|4 000 V|
|**protection class IP**||
|● of the enclosure|IP20|
|**shock resistance**|8 g / 10 ms|



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|**vibration resistance according to IEC 60068-2-6**|10 ... 55 Hz: 0.35 mm|
|---|---|
|electrical endurance(operatingcycles)typical|100 000|
|**Substance Prohibitance(day/month/year)**|05/01/2012|
|**SVHC substance name**|Lead CAS-No. 7439-92-1|
|**Net Weight**|0.46g|
|**Ambient conditions**||
|installation altitude at height above sea level maximum|2 000 m|
|● note|installation altitude: 5000 m with derating|
|**ambient temperature**||
|● during operation|0 ... 60 °C; from an operating altitude > 2000 m, the maximum permissible<br>temperature is reduced by0.5 °C / 100 m|
|● duringstorage|-20 ... +70 °C|
|relative humidityduringoperation|10 ... 95 %|
|air pressure accordingto SN 31205|90 ... 106 kPa|
|**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**|EN 60947-5-1|
|**Safety related data**||
|**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|
|PFHD with high demand rate accordingto IEC 62061|3.4E-9 1/h|
|ISO 13849||
|categoryaccordingto EN ISO 13849-1|4|
|**performance level(PL)**||
|**● according to ISO 13849-1**|PL e|
|● for delayed release circuit accordingto ISO 13849-1|e|
|IEC 61508||
|**Safety Integrity Level(SIL)**||
|● accordingto IEC 61508|3|
|● for delayed release circuit accordingto IEC 61508|SIL3|
|**safety device type according to IEC 61508-2**|Type B|
|hardware fault tolerance accordingto IEC 61508|1|
|T1 value 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<br>contacts of the relayoutputs required|gL/gG: 4 A|
|**Inputs**||
|**design of input**||
|● cascadinginput/functional switching|No|
|● feedback input|Yes|
|● start input|Yes|
|**number of sensor inputs**||
|● 1-channel or 2-channel|0|
|● 2-channel|3|
|**Outputs**||
|**number of outputs as contact-affected switching element**||
|● as NC contact||
|— for signalingfunction instantaneous contact|0|
|— for signalingfunction delayed switching|0|
|— safety-related instantaneous contact|0|
|— safety-related delayed switching|0|
|● as NO contact||
|— for signaling function instantaneous contact|0|



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|— for signalingfunction delayed switching|0|
|---|---|
|— safety-related instantaneous contact|1|
|— safety-related delayed switching|1|
|**mechanical service life(operating cycles) typical**|50 000 000|
|**thermal current of the switching element with contacts**<br>**maximum**|5 A|
|**number of outputs as contact-less semiconductor**<br>**switching element**||
|● for signalingfunction||
|— delayed switching|1|
|— instantaneous contact|1|
|● safety-related||
|— delayed switching|0|
|— instantaneous contact|0|
|**switching capacity current of semiconductor outputs**||
|● for signalingfunction at DC-13 at 24 V|0.02 A|
|**switching capacity current of the NO contacts of the relay**<br>**outputs at DC-13**||
|● at 24 V|2 A|
|● at 115 V|2 A|
|**switching capacity current of the NO contacts of the relay**<br>**outputs at AC-15**||
|● at 24 V|3 A|
|● at 230 V|3 A|
|**switching capacity current of the NC contacts of the relay**<br>**outputs at AC-15**||
|● at 24 V|3 A|
|● at 115 V|3 A|
|● at 230 V|2 A|
|**type of switching output**|optionallyPNP or NPN|
|**Encoder**||
|**encoder signal evaluation**|two signal tracks each with inverted signals|
|**type of signal level of the encoder**|optionallyTTL, HTL or sin/cos(Ua = 1Vss)|
|**type of failure response of the encoder**|high-resistance|
|**Proximity switch**||
|**type of voltage of the supply voltage ofproximity switches**|DC|
|**supply voltage ofproximity switches**|24 V;provided bythe device|
|**current consumption ofproximity switches maximum**|30 mA|
|**input voltage forproximity switch minimum**|10 V|
|**pulse duration ofproximity switches minimum**|75µs|
|**interpulseperiod ofproximity switches minimum**|75µs|
|**adjustment range of signal frequency ofproximity switches**|1 Hz ... 2 kHz|
|**measuring precision**|+-2 %|
|**switching hysteresis**|6.25 %|
|**Control circuit/ Control**||
|**type of voltage of the control supply voltage**|AC/DC|
|**control supply voltage 1 at AC**||
|● at 50 Hz|110 ... 240 V|
|● at 60 Hz|110 ... 240 V|
|**control supply voltage frequency**||
|**● 1 rated value**|50 Hz|
|**● 2 rated value**|60 Hz|
|**control supply voltage 1 at DC**|110 ... 240 V|
|**operating range factor control supply voltage rated value of**<br>**magnet coil at DC**||
|● initial value|0.8|
|● full-scale value|1.1|
|**operating range factor control supply voltage rated value of**<br>**magnet coil at AC**||
|● at 50 Hz|0.8 ... 1.1|
|● at 60 Hz|0.8 ... 1.1|



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|**Installation/ mounting/ dimensions**<br>~~a~~|**Installation/ mounting/ dimensions**<br>~~a~~|**Installation/ mounting/ dimensions**<br>~~a~~|
|---|---|---|
|**mounting position**<br>~~a~~||any|
|**fastening method**||screw and snap-on mounting|
|**height**||105.9 mm|
|**width**<br>~~Bn~~||45 mm<br>~~Bn~~|
|**depth**<br>~~Bn~~||124.3 mm<br>~~Bn~~|
|**Connections/ Terminals**|||
|**type of electrical connection**||screw terminal|
|**type of connectable conductor cross-sections**|||
|● solid||1x(0.5 ... 4 mm²)|
|● finelystranded with core endprocessing||1x(0.5 ... 2.5 mm²), 2x(0.5 ... 1.5 mm²)|
|● for AWG cables solid||2x(20 ... 14)|
|● for AWG cables stranded||2x(20 ... 14)|
|**connectable conductor cross-section**|||
|● solid||0.5 ... 4 mm²|
|● finelystranded with core endprocessing||0.5 ... 2.5 mm²|
|**AWG number as coded connectable conductor cross**<br>**section**|||
|● solid||20 ... 14|
|● stranded||20 ... 14|
|**Approvals Certificates**<br>~~a~~|||
|**Environment**<br>~~a~~|**General Product Approval**<br>~~a~~||



**General Product Approval** 

Environmental Con- ~~—~~ firmations 

|**Functional Saftey**|**Test Certificates**|**other**||**Railway**|
|---|---|---|---|---|
|Type Examination Cer-|Special Test Certific-|Confirmation|Confirmation|Confirmation<br>~~—~~|
|tificate|ate||||



~~e~~ **Further information** ~~e~~ **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 

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**last modified:** 

5/5/2026 

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