{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1901-1NR21","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1901-1NR21","canonicalUrl":"https://aoctrl.com/siemens/3RK1901-1NR21","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1901-1NR21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens AS-Interface, 3RK1901-1NR21, M12 branch cable with U_ASI and Uaux, 1 m, IP67/68/69K, max. 4 A.","salesMarkdown":"The Siemens 3RK1901-1NR21 is an AS-Interface M12 branch cable assembly, 1 m long, that transitions the AS-i flat cable to an M12 connector for a single device drop. It carries both AS-i power and auxiliary power (Uaux) on the same M12 socket, with the pinout: 1 = AS-i +, 2 = Uaux -, 3 = AS-i -, 4 = Uaux +. The insulation-piercing connection method taps directly into the flat cable without stripping. Rated for 4 A maximum load, it supplies the connected sensor or actuator from the AS-i bus and the auxiliary 24 V loop. The operating voltage range per the AS-Interface specification is 26.5 to 31.6 V. The IP67/68/69K rating means the M12 socket and the piercing head are sealed against dust ingress, temporary submersion (IP68), and high-pressure hot-water washdown (IP69K) — suitable for food-and-bev lines or outdoor conveyor sections where hose-down cleaning is routine. Mounts via screw fixing to the machine frame or panel, not DIN rail. The 1 m cable length gives some routing flexibility to reach the device from the AS-i trunk line.","metaTitle":"Siemens 3RK1901-1NR21 AS-i M12 Branch, IP67/68/69K, 4A","metaDescription":"Siemens 3RK1901-1NR21 AS-Interface M12 branch cable, 1m, IP67/68/69K, 4A rated. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Note":"cable must not end in the feeder","title":"3RK1901-1NR21","Function":"AS-i flat cable transition to M12","Connection":"M12 cable box 1 m","description":"AS-Interface M12 branch U_ASI and Uaux, 1 m cable with M12 cable socket angled IP67/68/69K, max. 4 A","Type of device":"AS-Interface accessories","lifecycle_stage":"current","Type of mounting":"screw fixing","Ambient Temperature":"-25 ... +75°C","Degree Of Protection":"IP67/68/69K","Design Of The Product":"AS-i M12 feeder, AS-i with Uaux, 1 m cable","Contacts Load rating max":"4A","Inputs socket assignment":"1 = AS-i \"+\" 2 = Uaux \"-\" 3=AS-i \"-\" 4 = Uaux \"+\"","Type Of Electrical Connection":"insulation piercing method for AS-Interface flat cable","Ambient Temperature During Storage":"-25 ... +85°C","operating voltage according to AS-Interface spezification":"26.5 ... 31.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2506c84bc50fd54eb200b0e325c9c833.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=472361&mlfb=3RK1901-1NR21"},"ai":{"faq":[{"question":"What is the function of the 3RK1901-1NR21?","answer":"It is an AS-i flat cable transition to M12, providing a branch point with both AS-i power and auxiliary power (Uaux) to a single device via a 1 m cable and angled M12 socket."},{"question":"What does the note 'cable must not end in the feeder' mean?","answer":"The note indicates that the AS-i flat cable should not terminate at this branch feeder; the feeder is a tap point, not an endpoint for the trunk line."},{"question":"What is the IP rating and what does it mean for deployment?","answer":"Rated IP67/68/69K, the assembly withstands dust, temporary submersion, and high-pressure hot-water washdown, making it suitable for wet or washdown environments like food processing lines."},{"question":"What is the maximum current rating?","answer":"The contacts are rated for a maximum load of 4 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1901-1NR21","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/3RK1901-1NR21 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}