{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8BB26-0SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8BB26-0SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8BB26-0SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8BB26-0SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I, Type 4 safety light curtain receiver, 14 mm resolution, 1800 mm protective height, 0 to 6 m range, PROFIsafe bus connection, order code 3SF7844-8BB26-0SS1.","salesMarkdown":"The 3SF7844-8BB26-0SS1 is a Type 4 safety light curtain receiver from the Siemens SIMATIC FS420I series, paired with a matching transmitter to form an electro-sensitive protective device (ESPD). With 14 mm resolution and an 1800 mm protective height, it is rated for finger detection per IEC 61496-1/2 — meaning it catches a hand or finger reaching into a hazard zone before it contacts the moving part. The 0 to 6 m range covers most single-machine guarding layouts without needing a secondary curtain. ## Integration and bus connection This receiver communicates over PROFIsafe via the SIMATIC FS420I interface, so it drops directly into a Siemens safety CPU without a separate safety relay module. The bus connection handles both the safety signal and diagnostic data — blanking, muting status, and error codes — over the same cable. No discrete wiring to a safety PLC input is required; the PROFIsafe telegram carries the OSSD pair status. 14 mm resolution means the curtain detects a 14 mm diameter object anywhere in the field — that is finger-protection class, not just hand or body detection. The 1800 mm height covers a typical standing operator's reach zone; for taller openings you stack two curtains. Blanking is supported (noted in the description), so you can exclude fixed machine parts like a work table from the detection zone without disabling the entire curtain. The 0 to 6 m range is the operating distance between transmitter and receiver; at maximum range the light intensity drops, so keep the optics clean in dusty environments.","metaTitle":"Siemens 3SF7844-8BB26-0SS1 Safety Light Curtain Receiver, 14","metaDescription":"Siemens 3SF7844-8BB26-0SS1 Type 4 safety light curtain receiver, 14mm resolution, 1800mm height, 0-6m range, PROFIsafe. Current lifecycle. Available 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/3SF7844-8BB26-0SS1/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3SF7844-8BB26-0SS1 and get a price?","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."},{"question":"What is the 3SF7844-8BB26-0SS1 used for?","answer":"It is a Type 4 safety light curtain receiver used to guard hazardous machinery — presses, robots, packaging lines — where a 14 mm finger-detection resolution is required and the protective height is 1800 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF7844-8BB26-0SS1","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/3SF7844-8BB26-0SS1 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}}