{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8BB26-1SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8BB26-1SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8BB26-1SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8BB26-1SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I light curtain Type 4 host receiver, 14 mm resolution, 1800 mm protective height, blanking 0 to 6 m, Profisafe bus connection, order code 3SF7844-8BB26-1SS1.","salesMarkdown":"## Safety light curtain, Type 4 host receiver The Siemens 3SF7844-8BB26-1SS1 is a Type 4 safety light curtain host receiver from the SIMATIC FS420I family, with 14 mm resolution and an 1800 mm protective height. The 14 mm detection capability means it catches fingers reaching into the hazard zone — finger-protection class per IEC 61496-1, suitable for hand-entry guarding around presses, assembly stations, and robotic cells. Blanking from 0 to 6 m allows the beam set to ignore fixed obstructions (e.g., a workpiece fixture) without disabling the entire curtain. ## Integration and fieldbus Communication is via Profisafe bus connection, which integrates directly into a SIMATIC FS420I safety controller over PROFINET with PROFIsafe profile. No separate safety relay needed for the bus interface — the host receiver reports status and diagnostics over the fieldbus, simplifying the safety CPU separation and reducing panel wiring.","metaTitle":"Siemens 3SF7844-8BB26-1SS1 Light Curtain Type 4, 14mm, 1800m","metaDescription":"Siemens 3SF7844-8BB26-1SS1 light curtain Type 4 host receiver, 14 mm resolution, 1800 mm height, blanking 0–6 m, Profisafe bus, SIMATIC FS420I. 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/3SF7844-8BB26-1SS1/alternatives.json"},"ai":{"faq":[{"question":"What is the resolution and protective height of 3SF7844-8BB26-1SS1?","answer":"14 mm resolution (finger detection) and 1800 mm protective height. The blanking range is 0 to 6 m, and the communication interface is Profisafe bus."},{"question":"Where can I buy 3SF7844-8BB26-1SS1?","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 price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF7844-8BB26-1SS1","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/3SF7844-8BB26-1SS1 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}}