{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8BB06-0SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8BB06-0SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8BB06-0SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8BB06-0SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I Type 4 safety light curtain receiver, 14 mm resolution, 450 mm protected height, 0 to 6 m range, PROFIsafe bus connection, order code 3SF7844-8BB06-0SS1.","salesMarkdown":"The 3SF7844-8BB06-0SS1 is a Type 4 safety light curtain receiver in the SIMATIC FS420I family, designed as the receive-side half of a finger-protection light barrier for hazardous machine zones. Its 14 mm resolution means it detects objects as small as a finger reaching into the guarded area — that's finger-protection class per IEC 61496-1, the standard governing electro-sensitive protective equipment. The 450 mm protected height and 0 to 6 m operating range define the physical coverage envelope: a single pair covers a 450 mm tall by 6 m wide access opening. PROFIsafe bus connection means it integrates directly into a Siemens safety PLC network without a separate safety relay module — the safety status travels over the PROFIBUS/PROFINET profile, not hardwired OSSD outputs. ## Deployment context — where this receiver fits on the line This receiver mounts opposite its paired emitter across a hazard zone — typically a press, robot cell, conveyor infeed, or palletizer access point. The 14 mm resolution catches fingers, so it suits applications where an operator can reach into the danger area but the machine must stop before contact. Blanking capability (up to the listed blanking height) lets fixed obstructions like tooling or part fixtures sit inside the curtain without triggering a false stop — the receiver ignores the blocked beams in the programmed blanked zone. PROFIsafe integration means the safety PLC handles the mute, blanking, and restart interlock logic in software, reducing the cabinet wiring count.","metaTitle":"Siemens 3SF7844-8BB06-0SS1 Safety Light Curtain Receiver, Ty","metaDescription":"Siemens 3SF7844-8BB06-0SS1 Type 4 safety light curtain receiver, 14 mm resolution, 450 mm height, 0-6 m range, PROFIsafe. Current lifecycle. 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/3SF7844-8BB06-0SS1/alternatives.json"},"ai":{"faq":[{"question":"What is the 14 mm resolution on this light curtain for?","answer":"14 mm resolution means the curtain detects a finger-sized object (14 mm diameter) entering the protected field. That qualifies as finger-protection class under IEC 61496-1, suitable for guarding access points where an operator's hand could reach the hazard."},{"question":"Where can I buy 3SF7844-8BB06-0SS1 and how is it quoted?","answer":"This receiver is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price figure is published here."},{"question":"Does this receiver work with a standard safety relay or only PROFIsafe?","answer":"This variant (3SF7844-8BB06-0SS1) has a PROFIsafe bus connection for direct integration into a Siemens safety PLC network. It does not provide conventional OSSD outputs for a hardwired safety relay."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF7844-8BB06-0SS1","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/3SF7844-8BB06-0SS1 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}}