{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8TB06-1SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8TB06-1SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8TB06-1SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8TB06-1SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I Type 4 light curtain host receiver, 14 mm resolution, 450 mm protected height, 0 to 6 m range, PROFIsafe bus connection, order code 3SF7844-8TB06-1SS1.","salesMarkdown":"## Safety light curtain for guarded zones The Siemens 3SF7844-8TB06-1SS1 is a Type 4 safety light curtain host receiver from the SIMATIC FS420I family, with 14 mm resolution across a 450 mm protected height and a sensing range of 0 to 6 m. Type 4 per IEC 61496-1 means it delivers the highest level of fault tolerance and self-checking — suitable for guarding hazardous machinery where a failure could cause serious injury. The 14 mm resolution catches fingers reaching into the hazard zone (finger-protection class), which is the typical spec for press brakes, assembly stations, and robot cells. ## PROFIsafe integration and bus connection This host receiver communicates over PROFIsafe via the SIMATIC FS420I interface, so it folds directly into a Siemens safety CPU without a separate safety relay or gateway hack. The bus connection carries both the safety-related OSSD signals and diagnostic data on the same cable — no parallel wiring for the safety chain. Commissioning engineers will configure the safety parameters (range, blanking, restart interlock) through the FS420I parameter assignment tool, not through DIP switches on the unit.","metaTitle":"Siemens 3SF7844-8TB06-1SS1 Light Curtain Type 4, PROFIsafe","metaDescription":"Siemens 3SF7844-8TB06-1SS1 Type 4 light curtain host receiver, 14 mm resolution, 450 mm height, 0-6 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/3SF7844-8TB06-1SS1/alternatives.json"},"ai":{"faq":[{"question":"What is the 3SF7844-8TB06-1SS1 used for?","answer":"It is a Type 4 safety light curtain host receiver used to guard hazardous machinery — it detects fingers (14 mm resolution) entering a 450 mm high by up to 6 m wide protected zone and communicates the safety status over PROFIsafe to a SIMATIC FS420I safety controller."},{"question":"Where can I buy the 3SF7844-8TB06-1SS1?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF7844-8TB06-1SS1","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/3SF7844-8TB06-1SS1 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}}