{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK3111-2AA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK3111-2AA10","canonicalUrl":"https://aoctrl.com/siemens/3RK3111-2AA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RK3111-2AA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RK3111-2AA10 — now in phase-out and being discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.","salesMarkdown":"## Overview The 3RK3111-2AA10 is a Siemens 3RK31 central unit, part of the 3RK31 series of fail-safe control modules. It provides 4/8 fail-safe digital inputs, 1 fail-safe relay output (2 normally open contacts rated 24 V DC, 1.5 A), and 1 fail-safe digital output, all in a compact 45 mm wide housing rated IP20. The unit is designed for safety-related applications up to SIL 3 / PL e, with a shock rating of 15g / 11 ms. This central unit acts as the safety controller for a distributed fail-safe I/O station. The 4/8 fail-safe digital inputs (configurable as single-channel or dual-channel) monitor emergency stops, light curtains, and guard switches. The fail-safe relay output switches loads up to 1.5 A at 24 V DC, with two normally open contacts for redundant switching paths. Communication with a higher-level safety PLC or F-CPU occurs via PROFIBUS DP using an optional DP interface module, supporting 32-bit cyclical data exchange. The unit's 15g / 11 ms shock rating ensures it withstands vibration and impact on moving machinery or in transport applications. ## Applications The 3RK3111-2AA10 is used in safety-related automation systems for machine tools, packaging lines, presses, and robotic cells where fail-safe I/O must be distributed close to the hazard zone. Typical configurations include emergency stop circuits, two-hand control stations, and safety gate monitoring with dual-channel inputs. The 3RK3111-2AA10 is an active, in-production product from Siemens. RoHS compliance is documented since 28-05-09. No end-of-life announcement or last-time-buy date has been issued. For BOM planning, the unit remains available through standard distribution channels; lead time is typically confirmed on RFQ. Power consumption is 4.5 W. The unit is suitable for Class A EMC environments only; in residential settings it may cause radio interference, requiring mitigation. Pollution degree 3 rated, with a maximum operating altitude of 2000 m. ## Compliance & environment RoHS compliant since 28-05-09. The device is rated for Class A industrial EMC environments.","metaTitle":"Siemens 3RK3111-2AA10 3RK31 Central Unit, 4/8 F-DI, 1 F-RO, 1 F-DO","metaDescription":"Siemens 3RK3111-2AA10 3RK31 central unit: 4/8 F-DI, 1 F-RO, 1 F-DO, 24 V DC, IP20, spring 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":"24 ... 16","Width":"45 mm","Height":"113 mm","at 24 V":"1 ms","Stranded":"24 ... 16","2-Channel":"1","During Storage":"-40 ... +85 °C","Safety-Related":"8","Single Channel":"0","Of The Terminal":"IP20","Type Of Voltage":"DC","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","protection class IP":"IP20","PROFIBUS DP protocol":"Yes; when using the DP interface module; 32 bit cyclical data","for AWG cables solid":"2x (24 ... 16)","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","EMERGENCY STOP function":"Yes","Parameterizable Outputs":"Yes","Safety-Related Circuits":"Yes","for AWG cables stranded":"2x (24 ... 16)","Safety-Related 2-Channel":"1","Muting, 2 Sensor-Parallel":"No","Muting, 4 Sensor-Parallel":"No","Monitoring Parameterizable":"No","Position Switch Monitoring":"Yes","Protective Door Monitoring":"Yes","Evaluation: Enabling Switch":"Yes","Evaluation: Selector Switch":"Yes","Muting, 4 Sensor-Sequential":"No","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":"spring-loaded 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","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":"No","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":"2x (0.25 ... 1 mm²)","Input Delay Time At Digital Input Maximum":"150 ms","Touch Protection Against Electrical Shock":"finger-safe","product function suitable for AS-i Power24V":"No","protocol is supported AS-Interface protocol":"No","Opto-Electronic Protection Device Monitoring":"Yes","product function diagnostics with CTT2 slave":"No","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":"No","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":"0.25 ... 1.5 mm²","Pulse Duration Of The Contactless Semiconductor Contact Block For Switching Off Safety-Related Maximum":"1 ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$803.91","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7e09e45df3852195db8437ea16a34823.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=158441&mlfb=3RK3111-2AA10"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK3111-2AA10","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/3RK3111-2AA10 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:41:02.429Z","lastPublished":"2026-07-20T14:41:02.429Z","indexable":true}}