{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CJ1W-PRM21","brand":"Omron","brandSlug":"omron","productSlug":"CJ1W-PRM21","canonicalUrl":"https://aoctrl.com/omron/CJ1W-PRM21","factsUrl":"https://aoctrl.com/api/mcp/products/CJ1W-PRM21","rawCanonicalId":null},"summary":{"shortDescription":"Omron CJ1W-PRM21, Type Communications Module, Series CJ1W, DIN Rail Mount, D-Sub Termination.","salesMarkdown":"## What This Module Does in the Rack The Omron CJ1W-PRM21 is a Remote I/O Communication Unit for the CJ Series PLC platform — it handles the fieldbus link between the CPU rack and remote I/O drops, so the cabinet layout can decouple the controller from the field wiring. It ships in bulk packaging, which is the standard for OEM builds and panel shops that integrate it into a larger BOM rather than retail-boxed single units. ## Fit Check for the BOM Line This module is keyed to the CJ1 backplane — it fits any CJ1 CPU rack or expansion rack that has an open slot for a communications unit. The D-Sub port mates with the standard PROFIBUS-DP or DeviceNet cabling, depending on the network variant; verify the protocol version against your master scanner.","metaTitle":"Omron CJ1W-PRM21 Communications Module, DIN Rail, D-Sub","metaDescription":"Omron CJ1W-PRM21 Remote I/O Communication Unit for CJ Series PLCs. DIN rail mount, D-Sub termination, 0°C to 55°C operating range. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"Type":"Communications Module","Series":"CJ1W","Weight":"0.221 lb (100.24 g)","Package":"Bulk","Mounting Type":"DIN Rail","lifecycle_stage":"eol_hot","Termination Style":"D-Sub","Operating Temperature":"0°C ~ 55°C","For Use With/Related Products":"CJ Series"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$621.58","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/12b20911ab35d34d198841f349959050.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/CJ1W-PRM21/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy CJ1W-PRM21 and get a price?","answer":"The CJ1W-PRM21 is sourced to order against an RFQ through independent distribution."},{"question":"What PLC models is CJ1W-PRM21 compatible with?","answer":"The CJ1W-PRM21 is designed for use with Omron's CJ Series PLCs — it fits any CJ1 CPU rack or expansion rack with an available slot for a communications module."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/omron/CJ1W-PRM21","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-PRM21 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}