{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK2402-2ME00-2AA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK2402-2ME00-2AA2","canonicalUrl":"https://aoctrl.com/siemens/3RK2402-2ME00-2AA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK2402-2ME00-2AA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RK2402-2ME00-2AA2 AS-Interface Slimline Compact I/O module, 4 digital inputs PNP Type 2, 2 relay outputs CO contacts, 22.5 mm width, IP20, A/B slave, screw and snap-on mounting.","salesMarkdown":"## 22.5 mm AS-i slice for control-cabinet I/O The Siemens 3RK2402-2ME00-2AA2 is a Slimline AS-Interface module packing 4 digital inputs and 2 relay outputs into a 22.5 mm wide housing that screws or snaps onto DIN rail — the standard footprint for a compact cabinet slice. The module operates as an A/B slave with profile S-7.A.0, addressable via the front socket, and draws 200 mA from the AS-i bus or up to 500 mA when sensor power is supplied through the separate Uaux feed — a key distinction when budgeting the AS-i power supply. ## Sensor supply split — AS-i bus vs Uaux The module's note explicitly separates sensor supply paths: with supply via the AS-Interface cable, the module draws 200 mA; with supply via the auxiliary voltage Uaux (20 to 30 V DC required), it draws 500 mA. If the sensors are powered from the AS-i bus, no additional power supply is needed — the 8.5 V from the AS-Interface line feeds the inputs. If higher sensor current is required, the Uaux feed handles up to 4 A for external sensors, with the module itself taking up to 500 mA from that rail. The thermal current rating is 5 A through the relay contacts, and the AS-Interface supply path is rated for 2 A — so the limiting factor in a multi-drop run is the bus current budget, not the module's own draw.","metaTitle":"Siemens 3RK2402-2ME00-2AA2 AS-i Slimline I/O, 4DI/2RQ","metaDescription":"Siemens 3RK2402-2ME00-2AA2 AS-Interface Slimline I/O module, 4 digital inputs PNP Type 2, 2 relay outputs CO contacts, 22.5 mm width, IP20, current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Note":"200 mA with supply via AS interface / 500 mA with supply via Uaux","Depth":"120 mm","Solid":"1x (0.5 ... 2.5 mm²), 2x ( 0.5 ... 1.5 mm²)","Width":"22.5 mm","title":"3RK2402-2ME00-2AA2","Height":"100 mm","at 24 V":"1 A","ID1 code":"7; Factory setting, changeable","at 110 V":"0.2 A","at 230 V":"0.1 A","description":"AS-i SlimLine Compact module SC22.5 digital, A/B slave 4 DI/2 RQ, IP20 4 x inputs for 3-wire sensor Sensor supply can be switched over 2 x outlet relay 1 A DC 24 V Screw terminals Width 22.5 mm","During Storage":"-40 ... +85 °C","Thermal Current":"5 A","at 30 V maximum":"270 mA","lifecycle_stage":"current","During Operation":"-25 ... +70 °C","Fastening Method":"screw and snap-on mounting","Shock Resistance":"15g / 11 ms (modules) or 10g / 11 ms (modules with device connector)","for AS-Interface":"2 A","Other Information":"Sensor supply via Uaux: Auxiliary feed 20 to 30 V DC required to supply the sensor. Sensor supply via AS-i: No additional power required.","from AS-interface":"8.5 V","Product Designation":"Slimline Compact I/O module for use in the control cabinet","at AWG cables solid":"1x (24 ... 14), 2x (24 ... 16)","protection class IP":"IP20","Design Of The Product":"AS-i SC22.5, 4DI/2RQ A/B","at AWG cables stranded":"Not permitted","Number Of Analog Inputs":"0","according to EN 61346-2":"K","Design Of The Slave Type":"A/B slave","Number Of Analog Outputs":"0","Number Of Digital Inputs":"4","Type Of Switching Output":"Relays, CO contacts","Number Of Digital Outputs":"2","AS-Interface slave profile":"S-7.A.0","Type Of Input Characteristic":"PNP Type 2","Type Of Connection Technology":"2- and 3-wire technology","For External Auxiliary Voltage":"4 A","From External Auxiliary Voltage":"1 V","at 24 V with AS-i Power24V maximum":"270 mA","type of address setting of AS-i slaves":"via front addressing socket","As Status Display Of The Inputs/Outputs":"Yellow LED","Number Of Digital Inputs Safety-Related":"0","Type Of Voltage Supply For Power Supply":"AS-Interface / U_AUX switchable","Finely Stranded With Core End Processing":"1x (0.25 ... 2.5 mm²), 2x (0.25 ... 1.0 mm²)","Property Of The Output Short-Circuit Proof":"No","Finely Stranded Without Core End Processing":"Not permitted","product function suitable for AS-i Power24V":"Yes","protocol is supported AS-Interface protocol":"Yes","Type Of Electrical Connection Of The Inputs And Outputs":"Screw terminals","operating voltage according to AS-Interface specification":"18 ... 31.6 V","Property Of The Sensor Supply Short-Circuit And Overload Resistant":"Yes","ampacity of the sensor supply for all inputs at ambient temperature 40 °C":"500 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/21aba316d4e6f7dd99a153872df7479d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=553730&mlfb=3RK2402-2ME00-2AA2"},"ai":{"faq":[{"question":"Where can I buy 3RK2402-2ME00-2AA2 and how do I get a price?","answer":"No stock-holding claim is made here — each order is confirmed against live supply."},{"question":"What is the difference between sensor supply via AS-i and via Uaux on this module?","answer":"When sensors are powered from the AS-Interface bus, the module draws 200 mA and no external auxiliary supply is needed — the 8.5 V from the AS-i line powers the inputs. When using the Uaux feed (20 to 30 V DC required), the module draws up to 500 mA and can supply up to 4 A to external sensors. The choice depends on the sensor current budget and whether a separate 24 V DC rail is already in the cabinet."},{"question":"What is the physical footprint of the 3RK2402-2ME00-2AA2?","answer":"The module measures 22.5 mm wide, 100 mm high, and 120 mm deep — a standard Slimline AS-i slice that fits alongside other 22.5 mm components on DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK2402-2ME00-2AA2","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/3RK2402-2ME00-2AA2 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}}