{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"D4SL-N4FFA-DN","brand":"Omron","brandSlug":"omron","productSlug":"D4SL-N4FFA-DN","canonicalUrl":"https://aoctrl.com/omron/D4SL-N4FFA-DN","factsUrl":"https://aoctrl.com/api/mcp/products/D4SL-N4FFA-DN","rawCanonicalId":null},"summary":{"shortDescription":"Omron D4SL-N4FFA-DN, Guard Lock Safety-door Switch, mechanical lock / 24VDC solenoid release, 2NC/1NO + 2NC built-in switch, M20 conduit, resin head, connector type.","salesMarkdown":"The Omron D4SL-N4FFA-DN is a guard lock safety-door switch — a solenoid-locking interlock that prevents access to a hazard zone until the machine controller signals a safe state. The mechanical lock holds the guard closed; the 24 VDC solenoid releases it only when power is applied, so a power loss keeps the guard locked (fail-safe). Built-in switching contacts are arranged as 2NC/1NO + 2NC, giving two normally-closed channels for the safety circuit plus one normally-open auxiliary for status feedback. The orange LED indicator on the 24 VDC version confirms solenoid power is present. The switch body has an M20 conduit outlet for cable entry, and the connection method is via a connector (not hardwired), which speeds replacement on the line. The head is resin; the standard release key is metal. This is a safety-rated interlock for guarding machine access points — press doors, hinged guards, or sliding gates where a trapped-key or solenoid-lock is required by the risk assessment.","metaTitle":"Omron D4SL-N4FFA-DN Guard Lock Safety-door Switch, 24VDC Sol","metaDescription":"Guard lock safety-door switch with mechanical lock and 24VDC solenoid release. Built-in switch: 2NC/1NO + 2NC. M20 conduit outlet, resin head, connector type. Mature lifecycle, sou","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Limit Switches"],"specifications":{"title":"D4SL-N4FFA-DN","Indicator":"D = 24VDC (orange LED indicator)","Product No.":"D4SL-N4FFA-DN","description":"Guard Lock Safety-door Switch","Product Type":"Guard Lock Safety-door Switch","Head Material":"F = Resin","Conduit Outlet":"4 = M20","Built-in Switch":"F = 2NC/1NO + 2NC","Shipping Weight":"1.5 Kg","lifecycle_stage":"mature","Release Key Type":"− = Standard release key (metal)","Connection Method":"N = Connector","Estimated Lead Time":"Usually ships in 1-10 working days.","Door Lock and Release":"A = Mechanical lock/24VDC solenoid release"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$173.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ee6db9fcbe980d3933c97068e27e7866.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the built-in switch configuration?","answer":"The switch configuration is 2NC/1NO + 2NC — two normally-closed contacts for the safety circuit, one normally-open auxiliary contact, plus an additional two normally-closed contacts. This provides redundant safety channels and a feedback signal."},{"question":"What voltage and indicator does this model use?","answer":"The D4SL-N4FFA-DN operates on 24 VDC and has an orange LED indicator that lights when solenoid power is applied."},{"question":"How is the D4SL-N4FFA-DN connected?","answer":"Connection is via a connector (not a direct cable gland), with an M20 conduit outlet for the cable entry."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/D4SL-N4FFA-DN","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/D4SL-N4FFA-DN 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}}