{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1SVR440721R1000","brand":"ABB","brandSlug":"abb","productSlug":"1SVR440721R1000","canonicalUrl":"https://aoctrl.com/abb/1SVR440721R1000","factsUrl":"https://aoctrl.com/api/mcp/products/1SVR440721R1000","rawCanonicalId":null},"summary":{"shortDescription":"ABB CL-LET.20DC2 logic-relay expansion module, part number 1SVR440721R1000, listed at 0.09 kgs in the PLC Expansion Modules class.","salesMarkdown":"The ABB 1SVR440721R1000 is a CL-LET.20DC2 expansion module designed to extend the I/O or function set of an ABB logic relay base. It sits in the PLC Expansion Modules class and is sized to mount alongside the matching logic-relay family on the same DIN rail, so it pulls its supply from the base unit rather than drawing a separate line. Listed mass is 0.09 kgs, which is light enough that DIN-rail fill and pitch — not weight — drive the panel layout call. A typical expansion of this class adds one or two module widths next to the base; the integrator should treat the rail real estate, not the kilograms, as the constraint. ## What the class is used for PLC Expansion Modules of this family are dropped next to a logic relay or compact controller when a small automation job needs more digital inputs, more relay outputs, or a dedicated analog channel than the base unit ships with. They are common in skid panels, pump control boxes, and small machine cells where a full PLC rack would be overkill but the base logic relay has run out of points. No production-status entry is on file for 1SVR440721R1000, so the official lifecycle posture is unstated in this record. ## Adjacent code reference Three ABB peer codes sit in the same expansion class: 1SBP260100R1001 at 0.09 kgs, and 1SBP260104R1001 and 1SBP260105R1001 at 0.10 kgs each. They are sibling order codes, not verified drop-in alternates for 1SVR440721R1000.","metaTitle":"ABB 1SVR440721R1000 CL-LET.20DC2 Logic Relay Expansion","metaDescription":"ABB 1SVR440721R1000 CL-LET.20DC2 expansion module for logic relays; PLC Expansion Module class, 0.09 kgs. Quoted to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":[],"specifications":{"Part #":"1SVR440721R1000","Weight":"0.09 kgs","Category":"PLCs and Accessories","Sub Category":"PLC Expansion Modules","Top Category":"PLCs & HMIs","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$305.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/1SVR440721R1000/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 1SVR440721R1000?","answer":"1SBP260100R1001 sits in the same ABB PLC Expansion Modules class as 1SVR440721R1000, but it is a sibling order code, not a verified drop-in alternate. Confirm base-unit compatibility and wiring before substituting."},{"question":"Will 1SVR440721R1000 drop into a panel specified around 1SBP260100R1001 without rewiring?","answer":"Both are ABB PLC Expansion Modules, but they are distinct order codes; whether 1SVR440721R1000 swaps in for a panel built around 1SBP260100R1001 depends on the base logic relay and terminal map, not on the class label. Verify the wiring diagram before the swap."},{"question":"What compliance documentation does ABB provide for 1SVR440721R1000?","answer":"No compliance entries (RoHS, REACH, UL, IEC) are on file for the 1SVR440721R1000 in this record. Request the declaration pack through the RFQ channel against the order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/1SVR440721R1000","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/abb/1SVR440721R1000 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:21:01.794Z","lastPublished":"2026-09-02T08:21:01.794Z","indexable":true}}