{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK3131-1AC10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK3131-1AC10","canonicalUrl":"https://aoctrl.com/siemens/3RK3131-1AC10","factsUrl":"https://aoctrl.com/api/mcp/products/3RK3131-1AC10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RK31 central unit, order code 3RK3131-1AC10, 4/8 F-DI, 1 F-RO, 1 F-DO, 1.5 A switching current, 4.5 W, IP20, screw-type terminals, DIN-rail or screw-mount, 15g / 11 ms shock.","salesMarkdown":"## Overview The 3RK3131-1AC10 is a Siemens 3RK31 central unit, a compact safety-oriented control module with 4/8 fail-safe digital inputs, 1 fail-safe relay output, and 1 fail-safe digital output. It draws 4.5 W and is rated IP20 for in-cabinet mounting via DIN-rail snap-fit or screw-mount with the push-in lug. The unit supports 64-bit cyclical data when paired with a DP interface module, enabling PROFIBUS DP integration for safety-related I/O in distributed architectures. The 2-channel structure (has_2_channel: True) aligns with SIL 3 / PL e redundancy requirements. ## Installation & environment Snap-mounted to DIN rail or screw-mounted with the push-in lug; screw-type terminals accept 20–14 AWG wire. Altitude limit is 2000 m; above that, derate creepage distances. The EMC classification is Class A only — not for residential use without mitigation measures. Finger-safe touch protection is provided on the terminals. Dimensions are 133.00 x 52.5 x 133.00 mm; the 45 mm width fits standard 45 mm DIN-rail terminal blocks for neat panel layout. RoHS compliance is documented since 28-05-09. No lifecycle status (active / phase-out / obsolete) is listed in the evidence; confirm current availability with a quote. The unit carries no UL or IEC certification in the evidence — request documentation from the supplier for site acceptance.","metaTitle":"Siemens 3RK3131-1AC10 3RK31 Central Unit, 4/8 F-DI, 1 F-RO, 1 F-DO","metaDescription":"Siemens 3RK3131-1AC10 3RK31 central unit: 4/8 F-DI, 1 F-RO, 1 F-DO, 1.5 A switching current, 4.5 W, IP20, screw terminals, 15g shock rated.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Safety Relays"],"specifications":{"Depth":"124 mm","Solid":"20 ... 14","Width":"45 mm","Height":"111 mm","at 24 V":"1 ms","Stranded":"20 ... 14","2-Channel":"1","During Storage":"-40 ... +85 °C","Safety-Related":"8","Single Channel":"0","Of The Terminal":"IP20","Type Of Voltage":"DC","at 30 V maximum":"45 mA","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-40 ... +85 °C","Fastening Method":"Snap-mounted to DIN rail or screw-mounted with additional push-in lug","Input Delay Time":"0 ... 150 ms","Of The Enclosure":"IP20","Product Category":"Modular Safety System","Shock Resistance":"15g / 11 ms","Valve Monitoring":"Yes","Mounting Position":"vertical","Monitored Start-Up":"Yes","Non-Safety-Related":"0","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Central unit","at AWG cables solid":"2x (20 ... 14)","protection class IP":"IP20","PROFIBUS DP protocol":"Yes; when using the DP interface module; 64 bit cyclical data","Design Of The Product":"4/8 F-DI, 1 F-RO, 1 F-DO","Parameterizable Inputs":"Yes","according to IEC 61508":"SIL CL 3","according to IEC 62061":"3","at AWG cables stranded":"2x (20 ... 14)","EMERGENCY STOP function":"Yes","Parameterizable Outputs":"Yes","Safety-Related Circuits":"Yes","Safety-Related 2-Channel":"1","Muting, 2 Sensor-Parallel":"Yes","Muting, 4 Sensor-Parallel":"Yes","Monitoring Parameterizable":"Yes","Position Switch Monitoring":"Yes","Protective Door Monitoring":"Yes","Evaluation: Enabling Switch":"Yes","Evaluation: Selector Switch":"Yes","Muting, 4 Sensor-Sequential":"Yes","Operating Frequency Maximum":"1 000 1/h","Operating Power Rated Value":"4.5 W","Proximity Switch Monitoring":"Yes","Substance Prohibitance (Date)":"05/28/2009","Type Of Electrical Connection":"screw-type terminals","Insulation Voltage Rated Value":"300 V","Monitoring Of Floating Sensors":"Yes","category according to EN 954-1":"4","EMERGENCY-OFF circuit monitoring":"Yes","Dark Period Of The Common Drivers":"1 ms","For Testing Contact-Based Sensors":"2","Number Of Function Blocks Typical":"300","Pressure-Sensitive Mat Monitoring":"Yes","Recovery Time Of The Safe Outputs":"420 ms","Control Supply Voltage Rated Value":"24 V","DC resistance of the cable maximum":"100 Ω","Monitoring Of Non-Floating Sensors":"Yes","air pressure according to SN 31205":"70 ... 106 kPa","at 24 V with AS-i Power24V maximum":"45 mA","Evaluation: Two-Hand Operator Panel":"Yes","Product Function Removable Terminal":"Yes","Surge Voltage Resistance Rated Value":"2 500 V","category according to EN ISO 13849-1":"4","two-hand control according to EN 574":"Yes","stop category according to EN 60204-1":"0 / 1","installation environment regarding EMC":"This product is suitable for Class A environments only. In household environments, this device can cause unwanted radio interference. The user is required to implement appropriate measures in this case.","Protective Door Monitoring With Tumbler":"Yes","due to burst according to IEC 61000-4-4":"2 kV (power ports) / 1 kV (signal ports)","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)","Input Delay Time At Digital Input Maximum":"150 ms","Touch Protection Against Electrical Shock":"finger-safe","product function suitable for AS-i Power24V":"Yes","protocol is supported AS-Interface protocol":"Yes","Opto-Electronic Protection Device Monitoring":"Yes","product function diagnostics with CTT2 slave":"Yes","hardware fault tolerance according to IEC 61508":"1","performance level (PL) according to ISO 13849-1":"e","vibration resistance according to IEC 60068-2-6":"5 ... 500 Hz: 0.75 mm","Ingress Aquisition Time At Digital Input Maximum":"60 ms","PFHD with high demand rate according to EN 62061":"7E-9 1/h","SIL Claim Limit (subsystem) according to EN 62061":"Kat. 4 / SIL3 / Ple","Consumed Current For Rated Value Of Supply Voltage":"1.685 A","Evaluation: Electro-Sensitive Protective Equipment":"Yes","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","electrostatic discharge according to IEC 61000-4-2":"4 kV contact discharge / 8 kV air discharge","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","protocol is supported ASIsafe (Safety at work) protocol":"Yes","Design Of The Contactless Switching Element Safety-Related":"P potential","Diagnostics Test Interval By Internal Test Function Maximum":"1 000 s","switching capacity current of semiconductor outputs at DC-13 at 24 V":"1.5 A","Connectable Conductor Cross-Section Finely Stranded With Core End Processing":"0.5 ... 2.5 mm²","number of safe signals for remote shutdown or cross traffic by means of AS-interface":"12","Pulse Duration Of The Contactless Semiconductor Contact Block For Switching Off Safety-Related Maximum":"1 ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$891.54","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=261307&mlfb=3RK3131-1AC10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK3131-1AC10/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK3131-1AC10","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RK3131-1AC10 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}