{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CS1W-B7A21","brand":"Omron","brandSlug":"omron","productSlug":"CS1W-B7A21","canonicalUrl":"https://aoctrl.com/omron/CS1W-B7A21","factsUrl":"https://aoctrl.com/api/mcp/products/CS1W-B7A21","rawCanonicalId":null},"summary":{"shortDescription":"Omron CS1W-B7A21 Interface Module, CS1W Series, 16 Digital Inputs and 16 Solid State Outputs, 12 ~ 24 VDC Supply, Backplane Mount, Screw Terminal, CE, cULus.","salesMarkdown":"## What This Module Does on a CS-Series Backplane The Omron CS1W-B7A21 is a backplane-mounted interface module for the CS Series PLCs, providing 16 digital inputs and 16 solid-state outputs in a single slot. It runs on a 12–24 VDC supply and terminates field wiring through screw terminals — the same termination you find on the CPU rack, so the wireway and gland-plate plan stays consistent across the panel. The solid-state outputs switch faster and last longer than relay outputs in high-cycle applications like sorting conveyors or packaging lines, but they do not carry the same surge rating — keep that in mind if you are driving small contactors or solenoid valves without a flyback diode. ## Backplane Fit and Panel Integration The module mounts directly onto the CS-series backplane, which means it shares the rack power supply and communicates over the CS bus without a separate fieldbus coupler. Screw-terminal wiring is straightforward for a panel builder — land the 24 VDC common and the 16 field inputs on the upper tier, the 16 solid-state outputs on the lower tier, and dress the bundle into the existing wire duct. Approved to CE and cULus, so it passes the panel-level certification for most industrial control installations in North America and Europe without a separate agency review. ## Sourcing Reality and Lifecycle Status The CS1W-B7A21 carries an eol_hot lifecycle marker, meaning it is in the end-of-life window — production has stopped or is stopping, and the remaining channel inventory is what is available. For a BOM freeze, the practical path is to source remaining stock or evaluate CS1W I/O interface modules that share the same form factor and backplane protocol. If you have a line-down situation or a last-time-buy quantity, send the RFQ with the quantity and target delivery window.","metaTitle":"Omron CS1W-B7A21 Interface Module, 16 Digital In / 16 SS Out","metaDescription":"Omron CS1W-B7A21 interface module for CS Series PLCs. 16 digital inputs, 16 solid-state outputs, 12-24 VDC supply, backplane mount, CE/cULus.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"Type":"Interface Module","Series":"CS1W","Weight":"0.529 lb (239.95 g)","Package":"Bulk","Mounting Type":"Backplane","Approval Agency":"CE, cULus","lifecycle_stage":"eol_hot","Voltage - Supply":"12 ~ 24VDC","Termination Style":"Screw Terminal","Number of Inputs and Type":"16 - Digital","Number of Outputs and Type":"16 - Solid State","For Use With/Related Products":"CS Series"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/CS1W-B7A21/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy Omron CS1W-B7A21?","answer":"The CS1W-B7A21 is sourced to order against an RFQ through independent distribution."},{"question":"Is CS1W-B7A21 compatible with CS series CPU?","answer":"Yes, the CS1W-B7A21 is listed for use with the Omron CS Series PLCs and mounts on the CS backplane, so it works with CS1G-CPU42 and other CS-series CPUs that have a free I/O slot."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/omron/CS1W-B7A21","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/CS1W-B7A21 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}}