{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF7844-8MD24-0SS1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF7844-8MD24-0SS1","canonicalUrl":"https://aoctrl.com/siemens/3SF7844-8MD24-0SS1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF7844-8MD24-0SS1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC FS420I Type 4 safety light curtain receiver, 30 mm resolution, 1650 mm protected height, 0-18 m range, PROFIsafe bus connection, muting function, order code 3SF7844-8MD24-0SS1.","salesMarkdown":"## Type 4 receiver with PROFIsafe and muting The Siemens 3SF7844-8MD24-0SS1 is a Type 4 safety light curtain receiver from the SIMATIC FS420I series, designed for point-of-operation guarding where a 30 mm resolution is required. With a 1650 mm protected height and a sensing range of 0 to 18 m, it covers large access openings on assembly lines, packaging machines, or robotic cells. The integrated PROFIsafe bus connection drops the safety signals directly onto the PROFINET network without a separate safety relay or interface module — the receiver talks safety frames to an F-CPU. Muting is built in, meaning the curtain can be temporarily overridden during material feed cycles without removing the guarding function entirely — a standard requirement on conveyor transfer stations. The 30 mm resolution catches fingers reaching into the hazard zone (finger-protection class per IEC 61496-1/2), so it qualifies for applications where operator access to the danger point is possible. ## Deployment context — PROFIsafe integration The receiver is the PROFIsafe node in the light-curtain pair. It connects via the standard M12 bus connector to the PROFINET network, and the safety frames are processed by an F-CPU (e.g., SIMATIC S7-1500F or ET 200SP F). The transmitter (not this order code) is the companion sender — ensure both are ordered as a matched pair for the same 30 mm resolution and 1650 mm height. Muting sensors are wired to the receiver's auxiliary inputs; the muting logic is configured in the safety program. The 0 to 18 m range covers long spans across conveyor belts or gantry openings without needing additional deflection mirrors.","metaTitle":"Siemens 3SF7844-8MD24-0SS1 Safety Light Curtain Receiver, 30","metaDescription":"Siemens 3SF7844-8MD24-0SS1 Type 4 safety light curtain receiver, 30 mm resolution, 1650 mm height, 0-18 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/3SF7844-8MD24-0SS1/alternatives.json"},"ai":{"faq":[{"question":"What is the resolution and protected height of this light curtain receiver?","answer":"The 3SF7844-8MD24-0SS1 has a 30 mm resolution and a 1650 mm protected height, with a sensing range of 0 to 18 m."},{"question":"Does this receiver support PROFIsafe and muting?","answer":"Yes. It has a PROFIsafe bus connection for direct integration into a PROFINET safety network and includes built-in muting capability."},{"question":"Where can I buy 3SF7844-8MD24-0SS1 and get current pricing?","answer":"This part is sourced 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/3SF7844-8MD24-0SS1","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/3SF7844-8MD24-0SS1 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}}