{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8BD13-0SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8BD13-0SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8BD13-0SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8BD13-0SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I Type 4 safety light curtain receiver, 30 mm resolution, 900 mm protected height, blanking, 0 to 18 m range, PROFIsafe bus connection, order code 3SF7844-8BD13-0SS1.","salesMarkdown":"The Siemens 3SF7844-8BD13-0SS1 is a Type 4 safety light curtain receiver from the SIMATIC FS420I family, designed for finger and hand detection at 30 mm resolution across a 900 mm protected height. Blanking is supported, and the sensing range spans 0 to 18 m. Communication is via PROFIsafe bus connection, integrating directly into a SIMATIC safety controller without a separate safety relay. Type 4 per IEC 61496-1/2 is the highest safety integrity level for electro-sensitive protective equipment — it can detect a 30 mm object anywhere in the field and is rated for applications up to SIL 3 / PL e. The 30 mm resolution means it catches fingers reaching into the hazard zone, making it suitable for press, robot cell, and assembly station guarding. The 900 mm protected height covers a typical standing operator's reach zone; pair it with a matching transmitter (same series) for the full light curtain. Blanking allows fixed or floating objects (like a workpiece fixture) to break the beam without tripping the safety output, as long as the blanked zone stays within programmed limits. The 0 to 18 m range gives flexibility for long-reach guarding on conveyor lines or large machinery. ## Integration context The PROFIsafe bus connection eliminates a separate safety relay — the receiver's safety status is transmitted directly to a SIMATIC F-CPU over the PROFIBUS or PROFINET network. Mounting uses standard light curtain brackets; alignment aids and a visible LED indicator on the receiver simplify commissioning. The 30 mm resolution and blanking are configured via the FS420I software tool.","metaTitle":"Siemens 3SF7844-8BD13-0SS1 Safety Light Curtain Receiver, Ty","metaDescription":"Siemens 3SF7844-8BD13-0SS1 Type 4 safety light curtain receiver, 30 mm resolution, 900 mm height, blanking, 0-18 m range, PROFIsafe. Current lifecycle stage. 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/3SF7844-8BD13-0SS1/alternatives.json"},"ai":{"faq":[{"question":"What is 3SF7844-8BD13-0SS1 used for?","answer":"It is a Type 4 safety light curtain receiver used for finger and hand detection at 30 mm resolution, guarding a 900 mm height zone up to 18 m away, with PROFIsafe bus connection to a SIMATIC safety controller."},{"question":"Where can I buy 3SF7844-8BD13-0SS1?","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/3SF7844-8BD13-0SS1","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/3SF7844-8BD13-0SS1 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}}