{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8BB22-1SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8BB22-1SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8BB22-1SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8BB22-1SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I Type 4 safety light curtain host receiver, 14 mm resolution, 1500 mm protective height, blanking, 0 to 6 m range, PROFIsafe bus connection, order code 3SF7844-8BB22-1SS1.","salesMarkdown":"The Siemens 3SF7844-8BB22-1SS1 is a Type 4 host receiver from the SIMATIC FS420I safety light curtain family. It provides 14 mm finger-protection resolution over a 1500 mm protective height, with blanking capability and a sensing range of 0 to 6 meters. The PROFIsafe bus connection integrates directly into a SIL 3 / PL e safety circuit without a separate interface module — the bus handles the safety protocol natively. 14 mm resolution means the curtain detects fingers reaching into the hazard zone — that is finger-protection class per IEC 61496-1. The 1500 mm protective height covers a typical machine access opening; the 0 to 6 m range suits most guarding distances on a production line. Blanking allows fixed or floating objects (e.g., a workpiece carrier) to pass through the field without tripping, while the rest of the curtain remains active. Type 4 per IEC 61496-2 means the curtain is self-checking and fault-tolerant — a single failure cannot cause loss of the safety function. This is the highest integrity level for electro-sensitive protective equipment, required for applications up to SIL 3 / PL e.","metaTitle":"Siemens 3SF7844-8BB22-1SS1 Safety Light Curtain, Type 4, 14","metaDescription":"Siemens 3SF7844-8BB22-1SS1 Type 4 host receiver, 14 mm resolution, 1500 mm height, 0–6 m range, PROFIsafe. Current lifecycle. 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/3SF7844-8BB22-1SS1/alternatives.json"},"ai":{"faq":[{"question":"What is the 3SF7844-8BB22-1SS1 used for?","answer":"It is a Type 4 safety light curtain host receiver used for finger-protection guarding (14 mm resolution) over a 1500 mm height, with blanking and PROFIsafe bus connection, typically on automated assembly lines and machine tools."},{"question":"Where can I buy 3SF7844-8BB22-1SS1?","answer":"This part is sourced to order against an RFQ through independent distribution. 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/3SF7844-8BB22-1SS1","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/3SF7844-8BB22-1SS1 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}}