{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-6TD08-0SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-6TD08-0SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-6TD08-0SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-6TD08-0SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3SF7844-6TD08-0SS1, Type 4 safety light curtain receiver, 30 mm resolution, 600 mm protective height, 0-18 m range, ASISAFE bus connection for SIMATIC FS440I cycle control.","salesMarkdown":"The Siemens 3SF7844-6TD08-0SS1 is a Type 4 safety light curtain receiver with 30 mm resolution and a 600 mm protective height, covering a sensing range of 0 to 18 m. It connects via ASISAFE bus to a SIMATIC FS440I cycle control unit, making it a matched component for a safety-rated optical guard on a production line or automated cell. Type 4 per IEC 61496-1/2 is the highest safety integrity for electro-sensitive protective equipment — it can detect a 30 mm finger-sized object reaching into the hazard zone and will initiate a stop signal. The 600 mm protective height and 0 to 18 m range suit guarding a single machine opening or a conveyor infeed where the transmitter and receiver are mounted opposite each other. The ASISAFE bus interface ties directly into a SIMATIC FS440I safety controller, so this receiver is not a standalone unit — it expects the FS440I cycle control for configuration and diagnostics. ## Integration context Mounts in a standard industrial enclosure or on a machine frame using the supplied brackets. The receiver and its paired transmitter must be aligned within the optical window; the ASISAFE bus cable routes back to the FS440I controller in the panel. No separate safety relay is needed — the FS440I handles the logic and output switching.","metaTitle":"Siemens 3SF7844-6TD08-0SS1 Safety Light Curtain Receiver, Ty","metaDescription":"Siemens 3SF7844-6TD08-0SS1 Type 4 safety light curtain receiver. 30 mm resolution, 600 mm height, 0-18 m range, ASISAFE bus for SIMATIC FS440I. Current lifecycle stage. Quoted to o","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/3SF7844-6TD08-0SS1/alternatives.json"},"ai":{"faq":[{"question":"What is the 3SF7844-6TD08-0SS1 used for?","answer":"It is a Type 4 safety light curtain receiver with 30 mm resolution and 600 mm height, used to guard a hazard zone up to 18 m wide, connected via ASISAFE bus to a SIMATIC FS440I cycle control unit."},{"question":"Where can I buy 3SF7844-6TD08-0SS1?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for 3SF7844-6TD08-0SS1?","answer":"The part carries a Type 4 safety classification per IEC 61496-1/2. For specific RoHS, REACH, or UL documentation, the manufacturer's declaration is available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF7844-6TD08-0SS1","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/3SF7844-6TD08-0SS1 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}}