{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK2402-2MG00-2AA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK2402-2MG00-2AA2","canonicalUrl":"https://aoctrl.com/siemens/3RK2402-2MG00-2AA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK2402-2MG00-2AA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens AS-i SC22.5, Slimline compact I/O module, 4 digital inputs PNP Type 2, 2 relay CO contacts, 22.5 mm width, IP20, screw and snap-on mounting.","salesMarkdown":"The Siemens 3RK2402-2MG00-2AA2 is a Slimline AS-i SC22.5 compact I/O module built for control-cabinet mounting. It gives you 4 digital inputs (PNP Type 2) and 2 relay changeover outputs, all packed into a 22.5 mm wide housing that screws or snaps onto a DIN rail. The AS-Interface slave profile is S-7.A.0, and the slave type is A/B, so it works on either standard or extended addressing networks. Address setting happens through a front-facing socket, not DIP switches on the side — saves a little panel space. Inputs are 2- and 3-wire capable, and the relay outputs are rated for 1 A at 24 V, 0.2 A at 110 V, and 0.1 A at 230 V. The thermal current through the module is 5 A, so don't plan on paralleling those relay contacts for a bigger load — the limit is per-contact and package. ## Power supply and sensor feed This module can pull its power two ways: 200 mA from the AS-Interface bus itself, or 500 mA if you feed it an auxiliary 24 V supply (Uaux). The sensor supply follows the same split — run sensors off the AS-i bus and you need no extra power; switch to Uaux and you need a 20 to 30 V DC auxiliary feed to power the sensors. The AS-Interface bus voltage is 8.5 V from the bus, and the external auxiliary supply can deliver up to 4 A at 1 V minimum. For the 24 V AS-i Power24V variant, the maximum draw is 270 mA at 30 V. At 22.5 mm wide, 100 mm tall, and 120 mm deep, this module fits the standard Slimline footprint — you can pack several next to each other on a DIN rail without losing much panel real estate. Fastening is screw or snap-on, so it goes in fast and stays put. Shock resistance is 15g / 11 ms for the module alone, 10g / 11 ms with the device connector attached.","metaTitle":"Siemens 3RK2402-2MG00-2AA2 AS-i SC22.5 I/O Module, 4DI/2RQ","metaDescription":"Siemens 3RK2402-2MG00-2AA2 Slimline AS-i SC22.5 I/O module. 4 digital inputs PNP Type 2, 2 relay CO outputs. 22.5 mm wide, IP20, current production. Sourced to order against RFQ.","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 ... 1.5 mm²), 2x (0.5 ... 1.5 mm²)","Width":"22.5 mm","title":"3RK2402-2MG00-2AA2","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 spring-type terminals Overall 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","protection class IP":"IP20","for AWG cables solid":"1x (20 ... 16), 2x (20 ... 16)","Design Of The Product":"AS-i SC22.5, 4DI/2RQ A/B","Number Of Analog Inputs":"0","according to EN 61346-2":"K","for AWG cables stranded":"1x (20 ... 16), 2x (20 ... 16)","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 ... 1,0 mm²), 2x (0,25 ... 1,0 mm²)","Property Of The Output Short-Circuit Proof":"No","Finely Stranded Without Core End Processing":"1x (0.5 ... 1.5 mm²), 2x (0.5 ... 1.5 mm²)","product function suitable for AS-i Power24V":"Yes","protocol is supported AS-Interface protocol":"Yes","Type Of Electrical Connection Of The Inputs And Outputs":"Spring-loaded 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":"$114.30","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/576826c3a25f5a65e772ca6ce384c655.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=552709&mlfb=3RK2402-2MG00-2AA2"},"ai":{"faq":[{"question":"What is the difference between the AS-i supply and Uaux supply on this module?","answer":"With supply via the AS-Interface bus, the module draws 200 mA and sensors are powered from the bus — no extra wiring needed. With supply via Uaux (auxiliary 24 V), the module draws 500 mA and requires a separate 20 to 30 V DC feed to power the sensors. Choose Uaux when your sensor load exceeds what the AS-i bus can deliver."},{"question":"What are the key ratings for the relay outputs on 3RK2402-2MG00-2AA2?","answer":"The two relay changeover contacts are rated 1 A at 24 V, 0.2 A at 110 V, and 0.1 A at 230 V. The module's thermal current is 5 A, which is the package limit — don't exceed individual contact ratings."},{"question":"Where can I buy 3RK2402-2MG00-2AA2?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK2402-2MG00-2AA2","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/3RK2402-2MG00-2AA2 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}}