{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK2402-2CE00-2AA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK2402-2CE00-2AA2","canonicalUrl":"https://aoctrl.com/siemens/3RK2402-2CE00-2AA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK2402-2CE00-2AA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens Slimline Compact I/O module, AS-i SC22.5, 4DI/4RQ A/B, 4 digital inputs PNP Type 2, 4 relay NO outputs, IP20, screw and snap-on mounting.","salesMarkdown":"The Siemens 3RK2402-2CE00-2AA2 is a Slimline Compact I/O module for control-cabinet use, designated as an AS-i SC22.5 4DI/4RQ A/B slave. It packs 4 digital inputs (PNP Type 2) and 4 relay NO outputs into a 22.5 mm wide housing that mounts via screw or snap-on onto DIN rail. It operates as an A/B slave per AS-Interface Specification 3.0, with a fixed slave profile of S-7.A.7 and an unchangeable ID1 code of 7. Address assignment is done through the front addressing socket. ## Power supply and sensor feed — the key decision The module draws 200 mA when powered solely via the AS-Interface cable, or 500 mA when an auxiliary supply (Uaux) is connected. That difference matters for bus loading: if you run the sensor supply from the AS-i bus, no extra power wiring is needed, but the module's own consumption plus the sensor load must stay within the AS-i power unit's budget. If you feed sensors from Uaux (20 to 30 V DC), the module can supply up to 4 A for external sensors, but you run a separate 24 V feed. The AS-Interface supply path delivers 2 A at 8.5 V to the module's internal logic; the external auxiliary path provides 1 V at 4 A for the sensor bus. For the relay outputs, the thermal current rating is 5 A, with specific switching capacities of 1 A at 24 V, 0.2 A at 110 V, and 0.1 A at 230 V. At 30 V DC maximum, the relay contacts handle 300 mA. When using AS-i Power24V, the 24 V output is limited to 300 mA. ## I/O and wiring The four digital inputs are PNP Type 2, suitable for 2- and 3-wire sensors. The four outputs are relay changeover contacts (normally open). There are no analog inputs or outputs, and no safety-related digital inputs — this is a standard digital slice for the AS-i bus. Terminals accept solid conductors: 1x (0.5 to 2.5 mm²) or 2x (0.5 to 1.5 mm²). For AWG, solid wire is 1x (24 to 14) or 2x (24 to 16). Stranded AWG is not permitted. Status of each input and output is indicated by yellow LEDs on the front. Rated IP20, so it belongs inside a control cabinet, not on the machine frame. Shock resistance is 15g / 11 ms for the module alone, or 10g / 11 ms with a device connector attached. Dimensions are 22.5 mm wide, 100 mm high, 120 mm deep — a standard slimline footprint that leaves room for adjacent slices.","metaTitle":"Siemens 3RK2402-2CE00-2AA2 AS-i SC22.5 4DI/4RQ A/B, IP20","metaDescription":"Siemens 3RK2402-2CE00-2AA2 Slimline Compact I/O module for control cabinet. 4 digital inputs PNP Type 2, 4 relay NO outputs. AS-i A/B slave Spec 3.0. IP20. Current production. Sour","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":"3RK2402-2CE00-2AA2","Height":"100 mm","at 24 V":"1 A","ID1 code":"7; Setting cannot be changed","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/4 RQ, IP20 4 x inputs for 3-wire sensor Sensor supply can be switched over 4 x output relay 1 A 24 V DC Screw terminals Width 22.5 mm","During Storage":"-40 ... +85 °C","Thermal Current":"5 A","at 30 V maximum":"300 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 (24 ... 14), 2x (24 ... 16)","Design Of The Product":"AS-i SC22.5, 4DI/4RQ A/B","Number Of Analog Inputs":"0","according to EN 61346-2":"K","for AWG cables stranded":"Not permitted","Design Of The Slave Type":"A/B slave (Spec. 3.0)","Number Of Analog Outputs":"0","Number Of Digital Inputs":"4","Type Of Switching Output":"Relays, NO contacts","Number Of Digital Outputs":"4","AS-Interface slave profile":"S-7.A.7","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":"300 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":"$134.62","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/130e429a9d376fed88285c4d8a19ce5b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=553800&mlfb=3RK2402-2CE00-2AA2"},"ai":{"faq":[{"question":"What are the key ratings I need to check for fit?","answer":"The module draws 200 mA from the AS-i bus or 500 mA with an auxiliary supply. Relay outputs switch 1 A at 24 V, 0.2 A at 110 V, or 0.1 A at 230 V, with a thermal current of 5 A. Sensor supply from Uaux can deliver up to 4 A. The 22.5 mm width and IP20 rating mean it fits a standard control cabinet DIN rail."},{"question":"How do I address this AS-i slave?","answer":"Address is set via the front addressing socket using a standard AS-i hand-held programmer. The ID1 code is fixed at 7 and cannot be changed. The slave profile is S-7.A.7."},{"question":"Can I use stranded wire with this module?","answer":"No. Only solid conductors are permitted: 1x (0.5 to 2.5 mm²) or 2x (0.5 to 1.5 mm²). For AWG, solid wire is 1x (24 to 14) or 2x (24 to 16). Stranded AWG is explicitly not permitted."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK2402-2CE00-2AA2","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/3RK2402-2CE00-2AA2 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}}