{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1405-1BG00-0AA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1405-1BG00-0AA2","canonicalUrl":"https://aoctrl.com/siemens/3RK1405-1BG00-0AA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1405-1BG00-0AA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS ASIsafe SlimLine safety module, 3RK1405-1BG00-0AA2, 2 safe digital inputs for mechanical contacts, 2 standard solid-state outputs, 24 V DC, IP20, 22.5 mm wide, spring-loaded terminals.","salesMarkdown":"The Siemens 3RK1405-1BG00-0AA2 is an ASIsafe SlimLine safety module — part of the SIRIUS family — that brings two safe digital inputs and two standard solid-state outputs into a 22.5 mm wide housing. It's built for integrating mechanical safety switches (like interlock or limit switches) into an AS-Interface safety network, where the safe inputs monitor the guard position and the outputs switch standard 24 V DC loads downstream. The module handles the safety logic over the AS-i bus, so it doesn't need a separate safety relay for each zone. The two safe inputs are designed for mechanical switching contacts — think door switches or emergency-stop buttons with dry contacts. Each input draws a minimum of 5 mA at signal \"1\" (contact closed), which is enough to wet the contacts and keep oxidation from causing nuisance faults out on the factory floor. The built-in watchdog and short-circuit protection mean the module self-checks for faults and won't latch up if a sensor wire gets pinched. At 22.5 mm wide and 91 mm deep, it tucks into tight wireways alongside other SlimLine blocks — you can pack several safety zones into a single row without chewing up cabinet real estate. IP20 protection means it's for dry indoor cabinets only — no washdown, no dust-laden environments. ## AS-Interface bus integration Power and data come over the AS-Interface cable at 26.5 to 31.5 V DC. The module draws a maximum of 60 mA from the AS-i bus, which is modest — you can run several of these on a single segment without overloading the AS-i power supply. The two standard outputs get their 24 V DC load power from the auxiliary AUX lines, not from the bus, so the safety outputs aren't limited by the bus current budget. Addressing is done through the front socket, and the module uses ID/ID2 codes B/F. The yellow LEDs show I/O status; the green/red LED indicates AS-Interface communication and diagnostics. If the bus goes down, the watchdog trips the safe outputs to a defined off-state.","metaTitle":"Siemens 3RK1405-1BG00-0AA2 ASIsafe SlimLine, 2 F-DI/2 DO","metaDescription":"Siemens 3RK1405-1BG00-0AA2 ASIsafe safety module, 2 safe inputs, 2 standard outputs, IP20, 22.5 mm wide. Phased-out — sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Type":"2 inputs, safe, 2 outputs, standard with Uaux","Depth":"91mm","Width":"22.5mm","title":"3RK1405-1BG00-0AA2","Height":"103.4mm","Sensors":"mechanical switching contact","Watchdog":"built-in","Addressing":"front addressing socket","ID/ID2 code":"B/F","description":"ASIsafe SlimLine module S22.5F Phased-out product!!! For further information, please contact our sales department digital safety, 2 F-DI/2 DQ, IP20 2 x input for mechanical sensors 2 x standard output 24 V DC Output supply from 24 V DC spring-type terminals Overall width 22.5 mm","During Storage":"-40 ... +85°C","display of I/Os":"yellow LED","lifecycle_stage":"current","During Operation":"-25 ... +70°C","Fastening Method":"standard rail mounting/wall mounting","I/O configuration":"7","protection class IP":"IP20","switching level Low":"contact open","Induction Protection":"built-in","switching level High":"contact closed","Design Of The Product":"Safe SlimLine module S22,5F, 2F-DI/2DO Uaux","Short-Ciruit Protection":"built-in","Type Of Switching Output":"solid state","Number Of Digital Outputs":"2","Type Of Voltage Of Output Voltages":"DC","display of AS-Interface/diagnostics":"green/red LED","AS interface total current input max":"60mA","Outputs external power supply 24 V DC":"via AUX POWER","reference code according to EN 61346-2":"A","Number Of Digital Inputs Safety-Related":"2","Property Of The Output Short-Circuit Proof":"Yes","protocol is supported AS-Interface protocol":"Yes","Input Current At Digital Input For Signal <1> Minimum":"5mA","Type Of Electrical Connection Of The Inputs And Outputs":"spring-loaded terminals","operating voltage according to AS-Interface spezification":"26.5 ... 31.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a80842f948f282132d2c3a12e11af889.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=27257&mlfb=3RK1405-1BG00-0AA2"},"ai":{"faq":[{"question":"What are the key ratings I need to check for fit?","answer":"The module provides 2 safe digital inputs for mechanical contacts and 2 standard solid-state outputs at 24 V DC. It draws up to 60 mA from the AS-Interface bus, and the outputs are powered separately via AUX 24 V. The housing is 22.5 mm wide, IP20, and mounts on standard DIN rail."},{"question":"Will this module drop into a panel designed for a 3RT1023-1AL20 contactor?","answer":"No. The 3RT1023-1AL20 is a power contactor with a 45 mm footprint and screw terminals for motor circuits. The 3RK1405-1BG00-0AA2 is a 22.5 mm safety module for AS-Interface bus communication. They serve completely different functions and have different wiring and bus requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1405-1BG00-0AA2","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/3RK1405-1BG00-0AA2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}