{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8BB17-1SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8BB17-1SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8BB17-1SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8BB17-1SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I Type 4 safety light curtain, host receiver, 14 mm resolution, 1200 mm protected height, blanking, 0 to 6 m range, PROFIsafe bus connection, order code 3SF7844-8BB17-1SS1.","salesMarkdown":"The Siemens 3SF7844-8BB17-1SS1 is a Type 4 safety light curtain host receiver from the SIMATIC FS420I family. It provides a 14 mm detection resolution across a 1200 mm protected height, with a sensing range of 0 to 6 meters. The 14 mm resolution means it catches fingers reaching into the hazard zone (finger-protection class per IEC 61496-1), making it suitable for guarding access to presses, assembly stations, and robotic cells where hand entry is the primary risk. This is the host receiver unit in a PROFIsafe bus-connected pair. It communicates safety status directly over PROFIsafe to a safety-rated PLC or drive, eliminating the need for a separate safety relay module in many architectures. The blanking function allows fixed objects (e.g., a workpiece fixture) to be ignored within the light curtain field without compromising safety integrity. ## Integration notes The host receiver connects via PROFIsafe to the safety controller — no hardwired safety relay needed. The 14 mm resolution and 1200 mm height determine the mounting brackets and alignment procedure: the emitter and receiver columns must be parallel and aligned within the manufacturer's angular tolerance. Blanking zones are configured in the safety PLC's F-parameter set, not on the unit itself. The 0 to 6 m range covers most machine access openings; if the gap exceeds 6 m, a different variant is needed.","metaTitle":"Siemens 3SF7844-8BB17-1SS1 Safety Light Curtain, Type 4, 14","metaDescription":"Siemens 3SF7844-8BB17-1SS1 Type 4 safety light curtain, 14 mm resolution, 1200 mm height, 0-6 m range, PROFIsafe. Current lifecycle. Quoted 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/3SF7844-8BB17-1SS1/alternatives.json"},"ai":{"faq":[{"question":"What is the 3SF7844-8BB17-1SS1 used for?","answer":"It is a Type 4 safety light curtain host receiver used for finger detection (14 mm resolution) guarding access to hazardous machinery, with a 1200 mm protected height and PROFIsafe bus connection."},{"question":"Where can I buy 3SF7844-8BB17-1SS1?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF7844-8BB17-1SS1","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/3SF7844-8BB17-1SS1 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}}