{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1105-1BE04-0CA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1105-1BE04-0CA0","canonicalUrl":"https://aoctrl.com/siemens/3RK1105-1BE04-0CA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1105-1BE04-0CA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RK1105-1BE04-0CA0 ASIsafe Basis safety monitor, 2 enabling circuits, 2 F-RO, IP20, screw terminal, 24 V 1 A supply.","salesMarkdown":"## Safety monitor for AS-Interface safety at SIL 3 / PL e The Siemens 3RK1105-1BE04-0CA0 is an ASIsafe Basis safety monitor — a dedicated safety relay module designed to supervise two enabling circuits on an AS-Interface safety network. It carries two fail-safe relay outputs (2 F-RO) and is rated for use up to Category 4 per EN 954-1, PL e per EN ISO 13849-1, and SIL 3 per IEC 61508, making it suitable for guarding hazardous machine zones where a fault must not lead to loss of the safety function. The module's response time is a maximum of 40 ms — fast enough to meet the stop-time requirements of most press, robot cell, and conveyor guarding applications, provided the downstream contactors and actuators are coordinated within that window. ## 24 V supply and relay contact ratings The monitor draws 1 A from a 24 V supply for its internal electronics; the relay outputs are rated 3 A at 24 V DC in DC-12 (DC-1) duty and 3 A at 250 V AC in AC-12 duty, 50/60 Hz. These ratings govern the maximum load the safety outputs can switch directly — typically solenoids, contactor coils, or indicator lamps — without an intermediate interface relay. For higher inrush loads or inductive switching, the 3 A continuous rating at 250 V AC sets the ceiling; the 115 V and 230 V auxiliary supply draws (0.1 A and 0.05 A respectively) are for the module's own control circuits, not the load side. ## DIN-rail mount, IP20, screw terminals The IP20 protection class means it is suitable for dry indoor enclosures; no washdown rating, so keep it behind a panel door in wet environments. Inputs and outputs connect via screw terminals (removable on this version), which simplifies wiring and replacement without disturbing the field wiring. The AS-Interface protocol is supported natively — no separate gateway or bus coupler needed for the safety channel.","metaTitle":"Siemens 3RK1105-1BE04-0CA0 ASIsafe Safety Monitor, 2 F-RO","metaDescription":"Siemens 3RK1105-1BE04-0CA0 ASIsafe safety monitor, 2 enabling circuits, 2 F-RO, IP20, screw terminals. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"24 V":"1A","Type":"2 enabling circuits","115 V":"0.1A","230 V":"0.05A","Depth":"120mm","Width":"45mm","title":"3RK1105-1BE04-0CA0","Height":"108mm","description":"ASIsafe Basis Safety monitor 2 F-RO 2 enabling circuits IP20, with screw terminal removable terminals Safe output relay Response time maximum 40 ms Monitor type 2, Version 3 Can be used up to Category 4 (EN954-1) up to PL E (EN ISO 13849-1) up to SIL 3 (IEC 61508)","During Storage":"-30 ... +70°C","lifecycle_stage":"current","During Operation":"-20 ... +60°C","Fastening Method":"screws / DIN rail","DC-12 (DC-1) 24 V":"3A","Response time max.":"40ms","protection class IP":"IP20","AC-12, 50/60 Hz 250 V":"3A","Design Of The Product":"safety monitor","Number Of Release Circuits":"2","reference code according to EN 61346-2":"F","protocol is supported AS-Interface protocol":"Yes","Type Of Electrical Connection Of The Inputs And Outputs":"screw terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/717178ae000ec71ab6fd60165bde6a17.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=250121&mlfb=3RK1105-1BE04-0CA0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1105-1BE04-0CA0","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/3RK1105-1BE04-0CA0 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}}