{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1903-0CK00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1903-0CK00","canonicalUrl":"https://aoctrl.com/siemens/3RK1903-0CK00","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1903-0CK00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC 3RK1903-0CK00 Remote I/O module, 2 parameterizable digital inputs, 24 V DC supply, 15 mm width, pluggable on terminal module.","salesMarkdown":"## Two digital inputs that you can actually configure The 3RK1903-0CK00 gives you two digital inputs that are parameterizable — meaning you can set their behaviour (e.g. debounce, inversion) to match the sensor or switch on the line, rather than being stuck with a fixed filter. That's the difference between a module that works in one cabinet design and one that follows the machine revision. ## 24 V supply with a real operating window Rated 24 V DC nominal, but the permissible range is 20.4 V to 28.8 V. That 8.4 V window covers a sagging 24 V bus on a long cable run or a slightly overcharged power supply — no separate voltage regulator module needed for this slice. Supply voltage comes in via the backplane bus, so the module draws its control power from the rack — no point-to-point wiring for the 24 V feed. The main energy infeed uses screw-type terminals and the load-side outgoing feeder also lands on screw terminals. ## 15 mm wide — fits where a wider module won't At 15 mm wide, this module takes up one slot on the terminal module. Depth is 95 mm, height 196.5 mm. Mounting position is vertical or horizontal — so it works in a shallow enclosure where the DIN rail runs sideways, or a tall cabinet where the rail runs vertically. Fastening method is pluggable on terminal module — the module clips onto a base terminal block, not directly onto the DIN rail. That means you can pre-wire the base, then snap the electronics on after the cabinet is dressed. Saves time on rework if the module needs swapping. This module supports brake control with 230 V AC — so it can directly switch an AC brake coil on a motor holding brake, without an interposing relay. No brake control for 24 V DC, 180 V DC, or 500 V DC. EMC immunity is to IEC 60947-1, degree of severity 3, ambient A (industrial sector). Surge voltage resistance rated value is 4 kV. That means it's designed for the electrical noise environment of a motor control centre — not just a clean control room. Lifecycle stage is listed as current. Substance prohibitance date is 05/01/2012 — the module complies with RoHS and REACH requirements as of that date.","metaTitle":"Siemens 3RK1903-0CK00 SIMATIC Remote I/O, 2 DI, 24 V DC","metaDescription":"Siemens 3RK1903-0CK00 SIMATIC Remote I/O module. 2 parameterizable digital inputs, 24 V DC supply (20.4-28.8 V), 15 mm wide. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"95 mm","Width":"15 mm","at DC":"24 ... 24 V","title":"3RK1903-0CK00","Height":"196.5 mm","description":"XB6 for ET 200S motor starter for DS1-X, RS1-X for DS1E-X, RS1E-X brake control module for F-DS1E-X, F-RS1E-X 400 V AC 0.5 A for motors with mechanical brakes with 2 digital inputs","Of The Inputs":"1 byte","During Storage":"-40 ... +70 °C","lifecycle_stage":"current","During Operation":"0 ... 60 °C","During Transport":"-40 ... +70 °C","Fastening Method":"pluggable on terminal module","Shock Resistance":"5g / 11 ms","Mounting Position":"vertical, horizontal","Product Brand Name":"SIMATIC","Maximum Permissible":"28.8 V","Minimum Permissible":"20.4 V","Vibration Resistance":"2g","For Main Energy Infeed":"screw-type terminals","supply voltage 1 at DC":"24 ... 24 V","Number Of Digital Inputs":"2","brake control with 24 V DC":"No","brake control with 180 V DC":"No","brake control with 230 V AC":"Yes","brake control with 500 V DC":"No","For Main Energy Transmission":"via energy bus","For Supply Voltage Line-Side":"via backplane bus","For Load-Side Outgoing Feeder":"Screw-type terminals","Operating Voltage Rated Value":"400 ... 400 V","Substance Prohibitance (Date)":"05/01/2012","supports PROFIenergy shutdown":"No","Digital Inputs Parameterizable":"Yes","For Communication Transmission":"via backplane bus","Of The Communication Interface":"via backplane bus","Digital Outputs Parameterizable":"No","For Supply Voltage Transmission":"via backplane bus","Operating Frequency 1 Rated Value":"50 Hz","Operating Frequency 2 Rated Value":"60 Hz","Relative Humidity During Operation":"5 ... 95 %","Surge Voltage Resistance Rated Value":"4 kV","supports PROFIenergy measured values":"No","EMC immunity according to IEC 60947-1":"corresponds to degree of severity 3, ambience A (industrial sector)","Number Of Poles For Main Current Circuit":"2","Type Of Voltage Of The Control Supply Voltage":"DC","EMC emitted interference according to IEC 60947-1":"CISPR11, ambience A (industrial sector)","Relative Negative Tolerance Of The Operating Frequency":"10 %","Relative Positive Tolerance Of The Operating Frequency":"10 %","Installation Altitude At Height Above Sea Level Maximum":"2 000 m"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"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=100517&mlfb=3RK1903-0CK00"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1903-0CK00","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/3RK1903-0CK00 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}}