{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1901-2NR20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1901-2NR20","canonicalUrl":"https://aoctrl.com/siemens/3RK1901-2NR20","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1901-2NR20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS AS-Interface M12 branch, 3RK1901-2NR20, flat cable transition to M12 socket, IP67/68/69K, 4 A rated, screw fixing.","salesMarkdown":"The Siemens 3RK1901-2NR20 is an AS-Interface accessory that transitions the AS-i flat cable to a single M12 socket, carrying both AS-i power (26.5...31.6 V per the AS-Interface specification) and auxiliary power on the same connector. Rated for 4 A continuous, it handles the current draw of a small sensor cluster or actuator node without needing a separate power tap. The IP67/68/69K rating means the housing and M12 connection survive high-pressure washdown and temporary submersion — standard for food, beverage, and washdown-zone deployments where hose-down cleaning is routine. Mounts via screw fixing with a specified tightening torque of 1.65 N·m. The electrical connection uses an insulation-piercing method for the AS-Interface flat cable — no stripping required, just clamp and tighten. Socket pin assignment: pin 1 = ASI +, pin 2 = AUX -, pin 3 = ASI -, pin 4 = AUX +. The note \"cable must not end in the feeder\" means the flat cable must pass through this tap point and continue to the next node or terminator — this is a mid-line tap, not a line-end terminator.","metaTitle":"Siemens 3RK1901-2NR20 AS-i M12 Branch, IP67/68/69K, 4A","metaDescription":"Siemens 3RK1901-2NR20 AS-Interface M12 branch, transitions flat cable to M12 socket. IP67/68/69K, 4A rated. Active production. Sourced to order.","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","Function":"AS-i flat cable transition to M12","Number sockets":"1","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 + 2 = AUX - 3=ASI - 4 = AUX +","Type Of Electrical Connection":"insulation piercing method for AS-Interface flat cable","Operational Current Rated Value":"4A","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":"$38.10","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=1123819&mlfb=3RK1901-2NR20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1901-2NR20/alternatives.json"},"ai":{"faq":[{"question":"What does the note 'cable must not end in the feeder' mean?","answer":"It means the AS-i flat cable must pass through this M12 branch and continue to the next device or terminator. This tap point is not designed to be the end of the cable run."},{"question":"What is the pin assignment on the M12 socket?","answer":"Pin 1 = ASI +, pin 2 = AUX -, pin 3 = ASI -, pin 4 = AUX +."},{"question":"What is the operating temperature range?","answer":"Ambient operating temperature is -25 to +75 °C. Storage temperature is -25 to +85 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1901-2NR20","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/3RK1901-2NR20 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}}