{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1901-2NR12","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1901-2NR12","canonicalUrl":"https://aoctrl.com/siemens/3RK1901-2NR12","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1901-2NR12","rawCanonicalId":null},"summary":{"shortDescription":"Siemens AS-Interface M12 branch, 3RK1901-2NR12, flat-cable to M12 transition, 2m cable with angled M12 socket, IP67/68/69K, max 4 A.","salesMarkdown":"The Siemens 3RK1901-2NR12 is an AS-Interface M12 branch — a transition piece that takes the AS-i flat cable and converts it to a standard M12 connector. It's a field-mountable accessory, not a logic device: it passes the AS-i power and data signals out to a sensor or actuator via the M12 socket. The connection uses an insulation-piercing method for the flat cable, so you don't strip or cut the main trunk — just clamp it down. The branch cable is 2 meters long with an angled M12 socket on the other end. Rated for 4 A maximum contact load and 3 A operational current, it handles the typical draw of a few AS-i slaves on the drop. The operating voltage matches the AS-Interface spec: 26.5 to 31.6 V. IP67/68/69K means this branch survives washdown, high-pressure spray, and temporary submersion. On a lube route or in a brewery, that matters — the M12 socket and the cable entry are sealed against water and dust. Ambient range of -25 to +75 °C covers most plant-floor conditions. ## Mounting and wiring note Mounts via screw fixing — no DIN rail clip. The tightening torque on the fixing screws is 1.65 N·m. The M12 socket assignment is pin 1 for ASI+ and pin 3 for ASI-. One note in the spec: the cable must not end in the feeder. That means the branch is a pass-through tap; the flat cable continues past this point to the next drop. Don't terminate the trunk here.","metaTitle":"Siemens 3RK1901-2NR12 AS-i M12 Branch, IP67/68/69K, 4A","metaDescription":"Active Siemens 3RK1901-2NR12 AS-Interface M12 branch cable, 2m with angled M12 socket. IP67/68/69K, 4A rated. Screw-fix transition from flat cable to M12. Sourced to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Note":"cable must not end in the feeder","title":"3RK1901-2NR12","Function":"AS-i flat cable transition to M12","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","Contacts Load rating max":"4A","Inputs socket assignment":"1 = ASI + 3=ASI -","Type Of Electrical Connection":"insulation piercing method for AS-Interface flat cable","Operational Current Rated Value":"3A","Tightening Torque Of Fixing Screw":"1.65 ... 1.65N·m","Ambient Temperature During Storage":"-25 ... +85°C","operating voltage according to AS-Interface spezification":"26.5 ... 31.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$25.40","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=1123818&mlfb=3RK1901-2NR12"},"ai":{"faq":[{"question":"What is 3RK1901-2NR12's listed function?","answer":"AS-i flat cable transition to M12 — it connects the AS-Interface flat cable to an M12 socket for a sensor or actuator drop."},{"question":"What does 'cable must not end in the feeder' mean?","answer":"The branch is a pass-through tap; the AS-i flat cable continues past this point. Do not terminate the trunk cable at this branch."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1901-2NR12","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/3RK1901-2NR12 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}}