{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8BD08-1SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8BD08-1SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8BD08-1SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8BD08-1SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I Type 4 safety light curtain host receiver, 30 mm resolution, 600 mm protected height, blanking, 0 to 18 m range, Profisafe bus connection, order code 3SF7844-8BD08-1SS1.","salesMarkdown":"The Siemens 3SF7844-8BD08-1SS1 is a Type 4 safety light curtain host receiver from the SIMATIC FS420I family, with 30 mm resolution and a 600 mm protected height. It handles blanking and reaches 0 to 18 m, connecting via Profisafe bus. That 30 mm resolution means it catches fingers reaching into the hazard zone — finger-protection class per IEC 61446-1 — so it's suited for guarding robot cells, assembly stations, and manual workstations where hand access is the risk. ## Deployment Context As a Type 4 host receiver with Profisafe bus connection, this light curtain integrates directly into a SIMATIC safety controller via the FS420I interface — no separate safety relay needed for the communication path. The 0 to 18 m range covers long reach across a conveyor or gantry cell. Blanking allows fixed obstructions (brackets, machine frames) within the field without disabling the curtain, which avoids nuisance trips on a production line.","metaTitle":"Siemens 3SF7844-8BD08-1SS1 Light Curtain Type 4 Host Receive","metaDescription":"Siemens 3SF7844-8BD08-1SS1 Type 4 safety light curtain host receiver, 30 mm resolution, 600 mm height, blanking, 0-18 m range, Profisafe. Current production. 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/3SF7844-8BD08-1SS1/alternatives.json"},"ai":{"faq":[{"question":"How do I get pricing and availability for 3SF7844-8BD08-1SS1?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for current pricing and availability — confirmed at quote time."},{"question":"What is the 3SF7844-8BD08-1SS1 used for?","answer":"It is a Type 4 safety light curtain host receiver used to guard hazard zones around machinery, detecting hand or finger intrusion at 30 mm resolution across a 600 mm height and up to 18 m range, with blanking for fixed obstructions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF7844-8BD08-1SS1","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/3SF7844-8BD08-1SS1 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}}