{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8BD17-1SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8BD17-1SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8BD17-1SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8BD17-1SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I, Type 4 safety light curtain host receiver, 30 mm resolution, 1200 mm protected height, 0 to 18 m range, Profisafe bus connection, order code 3SF7844-8BD17-1SS1.","salesMarkdown":"The Siemens 3SF7844-8BD17-1SS1 is a Type 4 safety light curtain host receiver from the SIMATIC FS420I family, designed for point-of-operation guarding where a 30 mm resolution catches fingers and hand-sized intrusions before they reach the hazard. The 1200 mm protected height covers a typical vertical access zone on a press brake or assembly station, and the 0 to 18 m range gives you room to mount the emitter-receiver pair across a wide cell without worrying about alignment margin. Blanking capability means you can let fixed machine elements (a workpiece support, a fixture) pass through the curtain without tripping the safety output — a feature that keeps production running on parts that would otherwise need a separate guard. ## Profisafe bus integration This host receiver connects directly to a Profisafe bus, so the safety signal travels over the same PROFINET cable as standard I/O — no separate safety relay or hardwired feedback loop needed. The safety PLC sees the curtain as a standard F-device on the bus, which simplifies diagnostics and lets you map the blanking zones and muting logic in software rather than with external bypass switches. If your panel already runs a Siemens F-CPU, this receiver drops into the safety program with the GSDML file and a few TIA Portal configuration clicks.","metaTitle":"Siemens 3SF7844-8BD17-1SS1 Safety Light Curtain, Type 4 Host","metaDescription":"Siemens 3SF7844-8BD17-1SS1 Type 4 safety light curtain host receiver, 30 mm resolution, 1200 mm height, 0-18 m range, Profisafe bus. Lifecycle stage current. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Safety Interlock Switches"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8BD17-1SS1/alternatives.json"},"ai":{"faq":[{"question":"What is the 3SF7844-8BD17-1SS1 used for?","answer":"It is a Type 4 safety light curtain host receiver used for point-of-operation guarding on machinery such as press brakes, assembly stations, and robotic cells. The 30 mm resolution detects fingers, the 1200 mm height covers a typical access zone, and the 0 to 18 m range accommodates wide guarding areas. Blanking allows fixed machine elements to pass through the curtain without triggering a stop."},{"question":"How do I get pricing and availability for 3SF7844-8BD17-1SS1?","answer":"Submit an RFQ through the storefront. Availability and current pricing are confirmed at quote time through independent distribution channels. No stock count or lead-time figure is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF7844-8BD17-1SS1","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/3SF7844-8BD17-1SS1 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}}