{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8TB13-0SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8TB13-0SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8TB13-0SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8TB13-0SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I, Type 4 safety light curtain receiver, 14 mm resolution, 900 mm protected height, 0–6 m range, PROFIsafe bus connection, order code 3SF7844-8TB13-0SS1.","salesMarkdown":"The Siemens 3SF7844-8TB13-0SS1 is a Type 4 safety light curtain receiver — the sensing half of a pair that creates a vertical or horizontal protective field. With 14 mm resolution and a 900 mm protected height, it catches fingers reaching into the hazard zone (finger-protection class per IEC 61496-1). The operating range spans 0 to 6 m, so it fits guarding applications from compact assembly stations to wider robot cells. ## Integration and bus connection This receiver connects via PROFIsafe bus to a SIMATIC FS420I safety controller — no separate safety relay needed for the logic. Cycle control is built in, meaning the light curtain handles its own test pulses and reports status over the bus. Mounting hardware and alignment brackets are standard for the FS420I family; the 900 mm column fits typical machine guarding frames.","metaTitle":"Siemens 3SF7844-8TB13-0SS1 Light Curtain Receiver, Type 4, 1","metaDescription":"Siemens 3SF7844-8TB13-0SS1 Type 4 safety light curtain receiver, 14 mm resolution, 900 mm height, 0–6 m range, PROFIsafe. Current lifecycle. Quoted on request.","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/3SF7844-8TB13-0SS1/alternatives.json"},"ai":{"faq":[{"question":"What is 3SF7844-8TB13-0SS1 used for?","answer":"It is a Type 4 safety light curtain receiver for guarding hazard zones. The 14 mm resolution detects fingers; the 900 mm height and 0–6 m range suit machine tools, assembly lines, and robot cells where a PROFIsafe connection to a SIMATIC FS420I controller is used."},{"question":"Where can I buy 3SF7844-8TB13-0SS1?","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 — submit an RFQ for a firm offer."},{"question":"What compliance documentation is available for 3SF7844-8TB13-0SS1?","answer":"As a Siemens SIMATIC FS420I safety component, it carries CE marking and is designed to meet IEC 61496-1 (Type 4) and EN ISO 13849-1 (PL e) requirements. Specific RoHS/REACH declarations are available from Siemens on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF7844-8TB13-0SS1","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/3SF7844-8TB13-0SS1 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}}