{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8BB04-0SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8BB04-0SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8BB04-0SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8BB04-0SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I safety light curtain, Type 4 standard receiver, 14 mm resolution, 300 mm blanking, 0 to 6 m range, PROFIsafe bus connection, order code 3SF7844-8BB04-0SS1.","salesMarkdown":"The Siemens 3SF7844-8BB04-0SS1 is a Type 4 safety light curtain receiver from the SIMATIC FS420I series, designed for finger-protection applications with a 14 mm resolution. The 300 mm blanking capability lets you define fixed or floating opaque zones through the protected field — useful when a machine fixture or workpiece must pass through the curtain without triggering a stop. The 0 to 6 m operating range covers most single-side guarding layouts on a production line. Type 4 per IEC 61496-1/2 is the highest safety integrity category for electro-sensitive protective equipment — it can detect a 14 mm object (finger-protection class) and is fail-safe against single faults. The PROFIsafe bus connection integrates directly into a SIMATIC safety controller over the standard PROFINET infrastructure, eliminating the need for a separate safety relay or OSSD-to-PLC interface. Blanking at 300 mm means you can mask a zone up to that width without reducing the safety rating, as long as the blanked area is fixed or floating per the configured logic. ## Deployment context This receiver pairs with a matching Type 4 emitter (same series) and mounts in standard safety-light-curtain columns or machine frames. The PROFIsafe connection uses a standard M12 bus connector, so the cabling follows the same fieldbus topology as the rest of the safety I/O. In a guarding application, the 14 mm resolution means it catches fingers reaching into the hazard zone — suitable for press brakes, assembly stations, and robotic cells where hand access must be prevented without a physical barrier.","metaTitle":"Siemens 3SF7844-8BB04-0SS1 Safety Light Curtain Receiver, Ty","metaDescription":"Siemens 3SF7844-8BB04-0SS1 Type 4 safety light curtain receiver, 14 mm resolution, 300 mm blanking, 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/3SF7844-8BB04-0SS1/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3SF7844-8BB04-0SS1 and how do I 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 3SF7844-8BB04-0SS1 used for?","answer":"It is a Type 4 safety light curtain receiver with 14 mm resolution and 300 mm blanking, used for finger-protection guarding on machinery with a PROFIsafe safety bus connection, part of the SIMATIC FS420I series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF7844-8BB04-0SS1","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/3SF7844-8BB04-0SS1 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}}