3TK2810-1BA42

**3TK2810-1BA42** 

**Data sheet** 

SIRIUS safety relay Safety-oriented Speed monitoring 24 V DC, 45 mm overall width Spring-type 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 24 V DC, 45 mm overall<br>width Spring-type terminal EC instantaneous: 2 NO EC delayed: 0 SC: 2 electrical<br>Auto-start/manual start Basic device Maximum achievable PL according to EN<br>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**|0.414 kg|
|**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**|DC|
|**control supply voltage 1 at DC rated value**|24 V|
|**operating range factor control supply voltage rated value of**<br>**magnet coil at DC**||
|● initial value|0.9|
|● full-scale value|1.1|
|**Installation/ mounting/ dimensions**||
|**mounting position**|any|
|**fastening method**|screw and snap-on mounting|
|**height**|107.7 mm|
|**width**|45 mm|
|**depth**|124.3 mm|
|**Connections/ Terminals**||
|**type of electrical connection**|spring-loaded terminals|
|**type of connectable conductor cross-sections**||



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|● solid||1x(0.5 ... 4 mm²)||||
|---|---|---|---|---|---|
|● finelystranded with core endprocessing||2 x(0.25 ... 1.5 mm²)||||
|● finelystranded without core endprocessing||2x(0.25 ... 1.5 mm²)||||
|● for AWG cables solid||2x(24 ... 16)||||
|● for AWG cables stranded||2x(20 ... 16)||||
|**connectable conductor cross-section**||||||
|● solid||0.25 ... 1.5 mm²||||
|● finelystranded with core endprocessing||0.25 ... 1.5 mm²||||
|● finelystranded without core endprocessing||0.25 ... 1.5 mm²||||
|**AWG number as coded connectable conductor cross**||||||
|**section**||||||
|● solid||24 ... 16||||
|● stranded||24 ... 16||||
|**Approvals Certificates**<br>~~a~~||||||
|**Environment**<br>**General Product Approval**||||||
|Environmental Con-<br>firmations<br>~~—~~<br>FAL<br>«sce<br>~=sCUK||||||
|**Functional Saftey**<br>**Test Certificates**|**other**|||**Railway**||
|Type Examination Cer-<br>Special Test Certific-|Confirmation<br>Confirmation|||Confirmation<br>~~—_~~||
|tificate<br>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 **Industry Mall (Online ordering system)** https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=3TK2810-1BA42 **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3TK2810-1BA42 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3TK2810-1BA42 **Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)** https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3TK2810-1BA42&lang=en 

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**last modified:** 

5/5/2026 

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