{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CJ1W-MD231","brand":"Omron","brandSlug":"omron","productSlug":"CJ1W-MD231","canonicalUrl":"https://aoctrl.com/omron/CJ1W-MD231","factsUrl":"https://aoctrl.com/api/mcp/products/CJ1W-MD231","rawCanonicalId":null},"summary":{"shortDescription":"Omron CJ1W-MD231 I/O Module, 16 Digital Inputs / 16 Solid State Outputs, DIN Rail, D-Sub, CE cULus NK, Active.","salesMarkdown":"## Compared to the CJ1W-MD233 The CJ1W-MD231: The closest functional peer is the CJ1W-MD233, also 16 digital inputs and 16 solid state outputs. The critical difference: the MD231 uses a D-Sub connector, while the MD233 has a rectangular multi-pin connector. Same I/O count, same approvals (CE, cULus, NK), same CJ-series backplane – but the termination change means you cannot drop the MD231 into a panel wired for the MD233 without changing the connector or cable assembly. ## Compliance & Approvals Listed approvals: CE, cULus, NK. Covers European CE-marked installations, UL-listed control panels, and NK-classified marine applications. Documentation supporting these certifications is available from the manufacturer.","metaTitle":"Omron CJ1W-MD231 I/O Module, 16 Digital In / 16 Solid State","metaDescription":"Active Omron CJ1W-MD231 I/O module: 16 digital inputs, 16 solid state outputs, DIN rail, D-Sub, CE/cULus/NK. Spec to BOM – submit an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"Type":"Input, Output (I/O) Module","title":"CJ1W-MD231","Series":"CJ1W","Weight":"0.198 lb (89.81 g)","Package":"Bulk","description":"I/O MODULE 16 DIG 16 SOLID ST","Mounting Type":"DIN Rail","Approval Agency":"CE, cULus, NK","lifecycle_stage":"eol_hot","Termination Style":"D-Sub","Number of Inputs and Type":"16 - Digital","Number of Outputs and Type":"16 - Solid State","For Use With/Related Products":"CJ Series"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$271.46 – $611.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional second-source for the CJ1W-MD231?","answer":"The CJ1W-MD233 offers the same 16 digital inputs and 16 solid state outputs, but uses a rectangular connector instead of D-Sub, so it is not a direct plug-in replacement."},{"question":"What is the listed type of the CJ1W-MD231?","answer":"It is an Input, Output (I/O) Module."},{"question":"What is the series of the CJ1W-MD231?","answer":"The series is CJ1W, part of the Omron CJ Series."},{"question":"Will the CJ1W-MD231 drop into a panel wired for a CJ1W-MD233 without rewiring?","answer":"No. The MD231 terminates in a D-Sub connector, while the MD233 uses a rectangular multi-pin connector. The backplane connection and I/O count are identical, but the field wiring interface differs."},{"question":"What compliance documentation is available for the CJ1W-MD231?","answer":"The module carries CE, cULus, and NK approvals. The manufacturer can provide declarations of conformity and certificates."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/CJ1W-MD231","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/omron/CJ1W-MD231 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}}