{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK3111-1AA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK3111-1AA10","canonicalUrl":"https://aoctrl.com/siemens/3RK3111-1AA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RK3111-1AA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS modular safety system central unit, 3RK3111-1AA10, 4/8 F-DI, 1 F-RO, 1 F-DO, SIL CL 3, IP20, snap-on DIN rail.","salesMarkdown":"The Siemens 3RK3111-1AA10 is a SIRIUS modular safety system central unit — the brain of a distributed safety setup. It gives you 4 or 8 fail-safe digital inputs (F-DI), one fail-safe relay output (F-RO), and one fail-safe digital output (F-DO), all rated SIL CL 3 per IEC 61508 and SIL 3 per IEC 62061. That means it's built for guarding hazardous motion on a machine cell — think press brakes, robot cells, or conveyor zones where a fault has to land the machine in a safe state, not just trip a general alarm. The inputs are parameterizable, so you can set them as single-channel or 2-channel depending on the sensor type — light curtains, E-stops, interlock switches. The 2-channel safety circuits (up to 8 safety-related circuits) let you wire dual-channel E-stop or guard-door chains without external contactors. Input delay is adjustable from 0 to 150 ms, which helps tune out nuisance trips from vibration on a punch press or a conveyor stop. Snap it onto DIN rail or screw-mount it with the push-in lug. Mounting position is vertical only. It draws 24 V DC, and the terminal block accepts 2 x 20-14 AWG solid or stranded wire. At 24 V the response time is 1 ms — fast enough for most safety applications, but watch the input delay setting if you need a quicker trip. ## Deployment Context Pop this into a panel where you need safety I/O distributed near the hazard rather than running every wire back to a central safety PLC. The IP20 enclosure means it lives inside a cabinet — not on the machine frame. It supports PROFIBUS DP when paired with the DP interface module, cycling 32 bits of data. That lets the safety CPU talk to a higher-level controller without hardwiring every status bit. Valve monitoring and monitored start-up are built in — handy for verifying a pneumatic valve has returned to its safe position before the cycle restarts.","metaTitle":"Siemens 3RK3111-1AA10 SIRIUS Safety Central Unit, 4/8 F-DI,","metaDescription":"Siemens 3RK3111-1AA10 SIRIUS modular safety central unit. 4/8 F-DI, 1 F-RO, 1 F-DO, SIL CL 3 per IEC 61508. Active production. Sourced to order against RFQ.","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","title":"3RK3111-1AA10","Height":"111 mm","at 24 V":"1 ms","Stranded":"20 ... 14","2-Channel":"1","description":"SIRIUS, central unit 3RK3 Basic for modular Safety system 3RK3 4/8 F-DI,1F-RO,1 F-DO,24 V DC parameterizable using software Safety ES 45 mm width screw terminal Up to SIL3 (IEC 61508) Up to Performance Level E (ISO 13849-1)","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","at AWG cables solid":"2x (20 ... 14)","protection class IP":"IP20","PROFIBUS DP protocol":"Yes; when using the DP interface module; 32 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":"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":"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","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":"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":"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":"0.5 ... 2.5 mm²","Pulse Duration Of The Contactless Semiconductor Contact Block For Switching Off Safety-Related Maximum":"1 ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/775b3bb02e6416d6a7eabd5f4a168660.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=212025&mlfb=3RK3111-1AA10"},"ai":{"faq":[{"question":"How do I get pricing and availability for 3RK3111-1AA10?","answer":"Send an RFQ through this listing. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here because the supply channel moves daily."},{"question":"What is the depth of 3RK3111-1AA10?","answer":"The depth is 124 mm."},{"question":"What wire sizes does 3RK3111-1AA10 accept?","answer":"It accepts 2 x 20-14 AWG solid or stranded wire per terminal."},{"question":"What safety level does 3RK3111-1AA10 meet?","answer":"It is rated SIL CL 3 per IEC 61508 and SIL 3 per IEC 62061, suitable for safety functions up to that integrity level."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK3111-1AA10","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/3RK3111-1AA10 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}}