{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6SL3544-0FA21-1PA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6SL3544-0FA21-1PA0","canonicalUrl":"https://aoctrl.com/siemens/6SL3544-0FA21-1PA0","factsUrl":"https://aoctrl.com/api/mcp/products/6SL3544-0FA21-1PA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SINAMICS G120D Control Unit CU240D DP-F, 6SL3544-0FA21-1PA0, PROFIBUS DP with Safety Integrated, 6 digital inputs, 2 digital outputs, PTC/KTY interface, encoder interface, EM brake control, MMC interface, IP65, 0.72 kg.","salesMarkdown":"## What this control unit does in a distributed drive The Siemens 6SL3544-0FA21-1PA0 is the CU240D DP-F control unit for the SINAMICS G120D distributed drive family — a spare-part designation that means it ships without a power module and must be mated to one in the field. It handles PROFIBUS DP communication with Safety Integrated, so it can serve as the safety CPU for the drive node without a separate safety relay or controller. The IP65 rating means it survives washdown and condensation on a conveyor or packaging line where a panel-mounted control unit would not. Six digital inputs and two digital outputs cover basic I/O for limit switches, sensors, and brake release; the PTC/KTY interface reads motor temperature directly, and the integrated encoder interface closes the speed loop without an external feedback card. Ambient temperature range is 0 to +40 °C — standard for an IP65 enclosure with no forced ventilation. The EM brake control output is sized for the holding brake on a G120D motor, so you do not need a separate brake rectifier. MMC interface allows parameter backup and cloning to a memory card, useful when swapping a failed unit on a live line.","metaTitle":"Siemens 6SL3544-0FA21-1PA0 SINAMICS G120D CU240D DP-F, PROFI","metaDescription":"Siemens SINAMICS G120D CU240D DP-F control unit with PROFIBUS DP and Safety Integrated. IP65, 6 DI/2 DQ, PTC/KTY, encoder interface. Mature lifecycle, available to order. Request q","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["AC Drives (VFD)"],"specifications":{"title":"6SL3544-0FA21-1PA0","Part #":"6SL3-544-0FA21-1PA0","Weight":"0.72 kgs","Category":"PLCs and Accessories","description":"***spare part*** SINAMICS G120D Control Unit CU240D DP-F PROFIBUS and Safety Integrated 6 DI, 2 DQ PTC/KTY interface EM brake control, MMC interface encoder interface degree of protection IP65 ambient temperature 0 to +40 °C without Power Module","Sub Category":"PLC Expansion Modules","Top Category":"PLCs & HMIs","lifecycle_stage":"mature"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,078.57","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7f83af60713c5920f24e2f4abbde1bb5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=317550&mlfb=6SL3544-0FA21-1PA0"},"ai":{"faq":[{"question":"What is the closest functional second-source for 6SL3544-0FA21-1PA0?","answer":"There is no direct second-source for this SINAMICS G120D control unit. The peer parts listed (6ED1052-1CA00-0BA1, 6ED1053-1BB00-0BA2, 6ED1053-1FH00-0BA2) are LOGO! expansion modules — different platform, different bus protocol, IP20 instead of IP65. They are not functional substitutes."},{"question":"Will 6SL3544-0FA21-1PA0 drop into a panel that was specified around 6ED1052-1CA00-0BA1 without rewiring?","answer":"No. The 6SL3544-0FA21-1PA0 is a SINAMICS G120D control unit with a sealed IP65 housing and PROFIBUS DP M12 connector; the 6ED1052-1CA00-0BA1 is a LOGO! expansion module with IP20 screw terminals on a DIN rail. They are mechanically and electrically incompatible — different mounting, different bus, different wiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6SL3544-0FA21-1PA0","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/6SL3544-0FA21-1PA0 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}}