{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1911-1AK22","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1911-1AK22","canonicalUrl":"https://aoctrl.com/siemens/3RK1911-1AK22","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1911-1AK22","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS ECOFAST fieldbus connection PROFIBUS CU/CU signal refresher, 3RK1911-1AK22, front side 2 x M12 socket/socket IP65, front side CU D-SUB 9-pole socket inside active (signal refresher), automatic baud rate search.","salesMarkdown":"The Siemens 3RK1911-1AK22 is a SIRIUS ECOFAST PROFIBUS signal refresher — a fieldbus repeater that regenerates the PROFIBUS signal on long cable runs or through IP65 junction boxes. It sits between the controller and remote I/O or drives in a distributed automation cell, with two M12 sockets on the front for the fieldbus trunk and an internal D-SUB 9-pole socket for a programming or diagnostic connection. ## Signal refresher function and auto-baud The 3RK1911-1AK22 is an active signal refresher, not a passive junction — it re-times and amplifies the PROFIBUS signal, extending the segment length beyond the standard 100 m for copper. Automatic baud rate search means it adapts to whatever speed the master sets (up to 12 Mbit/s), so no DIP-switch configuration is needed at commissioning. The internal D-SUB 9-pole socket gives a local programming port for a handheld PG or laptop without breaking the IP65 seal. ## Connector layout and panel integration Two M12 sockets (socket/socket) on the front handle the PROFIBUS trunk in and out — standard 5-pin B-coded for PROFIBUS. The D-SUB 9-pole socket is inside the housing, accessed by opening the cover. IP65 on the front means the M12 connectors are sealed when mated; the backplane or mounting surface must provide the rear seal. Mounts via the two fixing holes in the base — no DIN rail required, so it bolts to a machine frame or a sub-panel gland plate.","metaTitle":"3RK1911-1AK22 SIRIUS ECOFAST PROFIBUS Signal Refresher, IP65","metaDescription":"Siemens 3RK1911-1AK22 SIRIUS ECOFAST PROFIBUS signal refresher. IP65, M12 & D-SUB connectors, auto baud rate. Active production; lifecycle stage current. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"lifecycle_stage":"current","Substance Prohibitance (Date)":"01.07.2006"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=84531&mlfb=3RK1911-1AK22","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1911-1AK22/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RK1911-1AK22?","answer":"This part is quoted to order against an RFQ through our independent distribution network. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer."},{"question":"What compliance documentation does 3RK1911-1AK22 carry?","answer":"The substance prohibitance date of 01.07.2006 confirms RoHS compliance. As a SIRIUS product, it carries CE marking for the European market; UL and CSA listings are standard for the series but not explicitly stated in this entry."},{"question":"What is the closest functional second-source for 3RK1911-1AK22?","answer":"No direct second-source exists — this is a Siemens-specific ECOFAST PROFIBUS signal refresher with a unique M12/D-SUB layout. The peer contactors 3RT1016-1BB42 or 3RT1015-1BB42 are completely different products (power contactors) and cannot substitute. Stick with the 3RK1911-1AK22 for the PROFIBUS repeater function."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1911-1AK22","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/3RK1911-1AK22 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}}