{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1205-0BG00-0AA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1205-0BG00-0AA2","canonicalUrl":"https://aoctrl.com/siemens/3RK1205-0BG00-0AA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1205-0BG00-0AA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS ASIsafe Safe SlimLine module S22.5F, 2 fail-safe digital inputs for mechanical switching contacts, spring-loaded terminals, 22.5 mm wide, IP20, AS-Interface bus-powered 26.5–31.5 VDC.","salesMarkdown":"## ASIsafe module for two-channel safety on AS-Interface The Siemens 3RK1205-0BG00-0AA2 is an ASIsafe Safe SlimLine module S22.5F carrying two fail-safe digital inputs (2 F-DI) rated for mechanical switching contacts — think emergency-stop pushbuttons, door interlock switches, or position limit switches wired into an AS-Interface safety network. Each input reads a dry contact: open is the low signal level, closed is the high signal level. The module communicates over the AS-Interface bus protocol, drawing up to 45 mA from the bus supply (26.5–31.5 VDC per the AS-Interface specification). The front panel carries a yellow LED per input for I/O status and a green/red LED for AS-Interface diagnostics and communication health. Addressing is set via a front addressing socket using the standard AS-Interface addressing tool. ## Lifecycle status — phased out, sourced to order This part is marked as a phased-out product. The manufacturer's description explicitly states \"Phased-out product!!!\" and directs inquiries to the sales department for further information on the digital safety portfolio. At 22.5 mm wide and 91 mm deep, this module occupies a single modular-width slot on a DIN rail — useful when panel space is tight and you need to squeeze a safety input node between standard 22.5 mm I/O blocks. IP20 means it belongs inside an enclosure, not on the machine frame. The two fail-safe digital inputs are designed for mechanical switching contacts — that is, standard E-stops, safety gate switches, and interlock contacts that provide a dry open/closed signal. The module does not supply sensor power; it reads the contact state from the AS-Interface bus power. The switching levels are defined as \"contact open\" (low) and \"contact closed\" (high), with a minimum input current of 5 mA at the high signal. This current is sufficient to wet the contacts and prevent oxide buildup on low-voltage dry contacts — a common failure mode on safety circuits that see infrequent actuation.","metaTitle":"Siemens 3RK1205-0BG00-0AA2 ASIsafe Module, 2 F-DI, 22.5mm","metaDescription":"Siemens 3RK1205-0BG00-0AA2 ASIsafe S22.5F module. 2 safe digital inputs for mechanical contacts, spring terminals, IP20. Phased-out — sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Type":"2 inputs, safe","Depth":"91mm","Width":"22.5mm","Height":"90mm","Sensors":"mechanical switching contact","Addressing":"front addressing socket","ID/ID2 code":"B/F","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":"0","protection class IP":"IP20","switching level Low":"contact open","switching level High":"contact closed","Design Of The Product":"Safe SlimLine module S22,5F, 2F-DI","Type Of Voltage Of Output Voltages":"DC","display of AS-Interface/diagnostics":"green/red LED","AS interface total current input max":"45mA","reference code according to EN 61346-2":"A","Number Of Digital Inputs Safety-Related":"2","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=154531&mlfb=3RK1205-0BG00-0AA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1205-0BG00-0AA2/alternatives.json"},"ai":{"faq":[{"question":"What is 3RK1205-0BG00-0AA2 used for?","answer":"It is an ASIsafe safety I/O module that adds two fail-safe digital inputs to an AS-Interface safety network. It reads mechanical switching contacts such as emergency-stop pushbuttons, safety gate switches, and interlock limit switches, and communicates their status over the AS-Interface bus protocol."},{"question":"Where can I buy 3RK1205-0BG00-0AA2?","answer":"This phased-out module is sourced through independent industrial automation distribution. Submit an RFQ for current pricing and availability — stock and lead time are confirmed at quote time."},{"question":"Will 3RK1205-0BG00-0AA2 drop into a panel specified around 3RT1023-1AL20?","answer":"No. The 3RT1023-1AL20 is a SIRIUS power contactor with a 45 mm wide footprint and screw terminals for motor power circuits. The 3RK1205-0BG00-0AA2 is a 22.5 mm wide AS-Interface safety input module with spring-loaded terminals. They serve completely different functions — one switches motor loads, the other reads safety contacts on a fieldbus. No direct interchange."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1205-0BG00-0AA2","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/3RK1205-0BG00-0AA2 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}}