{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6SL3544-0FA20-1FA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6SL3544-0FA20-1FA0","canonicalUrl":"https://aoctrl.com/siemens/6SL3544-0FA20-1FA0","factsUrl":"https://aoctrl.com/api/mcp/products/6SL3544-0FA20-1FA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SINAMICS G120D, Control Unit CU240D PN, PROFINET, 6 DI, 2 DQ, PTC/KTY interface, EM brake control, MMC interface, encoder interface, IP65, ambient -10 to +55 °C, without Power Module, spare part.","salesMarkdown":"## Control unit for distributed drive cabinets This is the SINAMICS G120D Control Unit CU240D PN, order code 6SL3544-0FA20-1FA0, a PROFINET variant intended as a spare part for the G120D distributed drive family. It integrates six digital inputs, two digital outputs, a PTC/KTY temperature sensor interface, an electromagnetic brake control, an MMC card slot, and an encoder interface — all within an IP65-rated enclosure that handles ambient temperatures from -10 to +55 °C. The manufacturer classifies this unit's lifecycle stage as mature, meaning it is in the stable phase of the product lifecycle — not actively promoted for new designs but still supported for existing installations. The datasheet carries a revision date of 05.07.2021. The -10 to +55 °C ambient range covers most industrial floor conditions but note the lower limit: if your mill area sees sustained sub-zero temperatures during winter shutdowns, the unit needs to be kept above -10 °C before power-up. The PROFINET interface allows direct connection to a higher-level controller over industrial Ethernet, eliminating a separate fieldbus gateway. ## What the I/O and interfaces support The six digital inputs and two digital outputs handle basic machine signals — limit switches, pushbuttons, status lamps — without an additional I/O module. The PTC/KTY input directly monitors motor winding temperature, critical for protecting the drive against overload in hot-strip mill environments where radiant heat from the coil can push motor temperatures above the normal trip curve. The encoder interface closes the speed/position loop for tension control applications, and the integrated EM brake control manages holding brakes on vertical-axis loads.","metaTitle":"Siemens 6SL3544-0FA20-1FA0 SINAMICS G120D CU240D PN, IP65","metaDescription":"Siemens SINAMICS G120D Control Unit CU240D PN, 6 DI, 2 DQ, PTC/KTY, IP65, -10 to +55 °C. Mature lifecycle, sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["AC Drives (VFD)"],"specifications":{"lifecycle_stage":"mature","Datum: 05.07.2021":"Änderungen vorbehalten © Copyright Siemens 2021"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cc1a17ee1a438cc8d906b9b7adead356.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=494487&mlfb=6SL3544-0FA20-1FA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6SL3544-0FA20-1FA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 6SL3544-0FA20-1FA0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current availability and pricing — no stock or price figures are published here."},{"question":"What is the ambient temperature range of this control unit?","answer":"The control unit is rated for an ambient temperature of -10 to +55 °C, which covers most industrial environments but requires attention to cold-start conditions below -10 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6SL3544-0FA20-1FA0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/6SL3544-0FA20-1FA0 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}}