{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1901-1NR12","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1901-1NR12","canonicalUrl":"https://aoctrl.com/siemens/3RK1901-1NR12","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1901-1NR12","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RK1901-1NR12 AS-Interface M12 branch feeder, flat cable transition to M12, 2 m cable, IP67/68/69K, 4 A, screw fixing.","salesMarkdown":"## What this AS-i M12 branch does that a plain tee cannot The 3RK1901-1NR12 is an AS-Interface M12 branch feeder that transitions the AS-i flat cable to a standard M12 connector, carrying both the AS-i signal and power on the same cable — no separate Uaux line needed. Rated for 4 A continuous contact load, it powers a sensor or actuator node directly from the AS-i bus without an additional power supply tap. The insulation-piercing method taps into the flat cable without stripping or cutting the feeder — the branch installs live if the line is already powered, but the note says the cable must not end in the feeder, meaning this is a pass-through tap, not a termination point. ## Sealing and mounting for wet or washdown zones IP67/68/69K rating means the M12 socket and the flat-cable entry both withstand high-pressure washdown and temporary submersion — food-and-bev or chemical processing lines where a standard IP67 tee would fail at the cable gland. Screw fixing secures the branch to a panel or machine frame, not just dangling on the cable — the mounting point takes the mechanical strain off the M12 connection. Ambient range -25 to +75 °C covers freezer-floor to hot-motor-zone installations; storage tolerance extends to +85 °C. ## Pinout and voltage — what connects where M12 socket assignment: pin 1 carries AS-i '+', pin 3 carries AS-i '-' — standard AS-i pinout for a 4-pin M12 sensor/actuator cable. Operating voltage follows the AS-Interface specification at 26.5 to 31.6 V — the branch does not regulate or filter, it just passes bus power through to the M12 node. The 2 m cable is factory-moulded with an angled M12 socket, so the branch arrives as a single assembly — no field wiring of the M12 connector required.","metaTitle":"Siemens 3RK1901-1NR12 AS-i M12 Branch, IP67/68/69K, 4A","metaDescription":"Siemens 3RK1901-1NR12 AS-Interface M12 branch feeder with 2m cable, IP67/68/69K, rated 4A. Active production. Quoted to order.","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":"3RK1901-1NR12","Function":"AS-i flat cable transition to M12","Connection":"M12 cable box 2 m","description":"AS-Interface M12 branch U_ASI without Uaux, 2 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 without Uaux, 2 m cable","Contacts Load rating max":"4A","Inputs socket assignment":"1 = AS-i \"+\" 3=AS-i \"-\"","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":"$21.72","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=279795&mlfb=3RK1901-1NR12"},"ai":{"faq":[{"question":"What does the note 'cable must not end in the feeder' mean for installation?","answer":"It means the 3RK1901-1NR12 is a pass-through tap, not a termination point — the AS-i flat cable must continue past this branch to another device or to a terminating cap."},{"question":"What is the function of the 3RK1901-1NR12?","answer":"It transitions the AS-Interface flat cable to an M12 connector, providing a branch point for a sensor or actuator without a separate auxiliary power line."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1901-1NR12","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/3RK1901-1NR12 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}}