{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6SL3244-0BB00-1BA1","brand":"Siemens","brandSlug":"siemens","productSlug":"6SL3244-0BB00-1BA1","canonicalUrl":"https://aoctrl.com/siemens/6SL3244-0BB00-1BA1","factsUrl":"https://aoctrl.com/api/mcp/products/6SL3244-0BB00-1BA1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 6SL3244-0BB00-1BA1, SINAMICS G120 Control Unit CU240B-2, 24 V DC, RS-485 USS/Modbus RTU, 4 DI / 1 DQ / 1 AI / 1 AQ, IP20, -10 to 55 °C operation.","salesMarkdown":"## What the CU240B-2 actually is on the SINAMICS G120 The Siemens 6SL3244-0BB00-1BA1 is the SINAMICS G120 Control Unit CU240B-2, the parameterisation and I/O brain that bolts onto a separate SINAMICS G120 Power Module rather than the drive's power stage itself. It is ordered and shipped as a spare part, which means it is the swap-out module you carry when a failed CU takes a line down, not the complete drive. The on-board I/O is modest by design: 4 digital inputs, 1 digital output, 1 analogue input, 1 analogue output, plus a PTC / KTY / thermoclick interface for motor temperature protection. That envelope is the deciding factor for fit — any application that needs more than four digital inputs lands on the CU240E-2 or a higher CU, not this one. ## Fieldbus slice and commissioning interface Communication runs over an RS-485 port carrying both USS and Modbus RTU, which is what puts this B-type CU240B-2 into legacy serial-fieldbus retrofits and small machine builds where a PROFINET slice is not justified. The front-panel USB plus SD/MMC slot give the commissioning engineer the parameter upload/download path and firmware version slot without taking the drive out of the panel. Standalone draw from the Power Module is DC 24 V, the standard control rail on a G120 stack — confirm the 24 V supply budget on the cabinet before adding the CU, because a weak rail will fault the CU on power-up. ## Thermal envelope, IP rating, and panel placement Operating ambient is -10 to 55 °C and storage is -40 to 70 °C, so the unit is rated for an unconditioned control cabinet but not for an unventilated engine-room or outdoor enclosure without derating. Degree of protection is IP20 / UL open type, which means finger-safe behind the cabinet door but not sealed for washdown or food-grade duty — this is a cabinet-mounted module, not a field-mounted one. ## Loss budget and lifecycle read Power loss is 5.50 W at the control unit alone, which is the figure the cabinet thermal calc must add on top of the Power Module's loss before sizing the enclosure fan or filter. Lifecycle stage is recorded as mature, so the platform is in long-term support rather than active growth — confirm firmware compatibility with the connected Power Module before quoting, because a mature-line swap into a newer PM is not always drop-in. Production-quantity lead time is listed at 1 to 10 working days off the distribution channel, so a planned spare purchase fits a normal MRO cycle; line-down urgency is handled through the same channel with availability re-confirmed at quote time.","metaTitle":"Siemens 6SL3244-0BB00-1BA1","metaDescription":"Siemens 6SL3244-0BB00-1BA1 SINAMICS G120 Control Unit CU240B-2, RS-485 USS/Modbus RTU, 4 DI / 1 DQ / 1 AI / 1 AQ, IP20, mature lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["AC Drives (VFD)"],"specifications":{"title":"6SL3244-0BB00-1BA1","Weight":"0.49 Kg","Power loss":"5.50 W","Product No.":"6SL3244-0BB00-1BA1","description":"***spare part*** SINAMICS G120 Control Unit CU240B-2 B type RS-485 interface with USS/MODBUS RTU protocol 4 DI, 1 DQ, 1 AI, 1 AQ PTC/KTY/thermoclick interface USB and SD/MMC interface degree of protection IP20 ambient temperature 0 to +50 °C without Power Module","Product type":"SINAMICS G120 Control Unit CU240B-2","Shipping weight":"1.5 Kg","lifecycle_stage":"mature","The Power Module":"DC 24 V","Estimated Lead Time":"1 - 10 Working Days","Degree of protection":"IP20 / UL open type","Dimensions (HxWxD), approx":"19.9cm x 7.3cm x 4.6cm","Ambient temperature Storage":"40 ... 70 °C (-40 ... 158 °F)","Ambient temperature Operation":"-10 ... 55 °C (14 ... 131 °F)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$146.98 – $207.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/629f3af226871d7b824cf94dce8808c9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=229662&mlfb=6SL3244-0BB00-1BA1"},"ai":{"faq":[{"question":"Where can I order 6SL3244-0BB00-1BA1 and what is the lead time?","answer":"The listed lead time window is 1 to 10 working days; current stock and pricing are confirmed at RFQ rather than carried as a fixed figure."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6SL3244-0BB00-1BA1","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/6SL3244-0BB00-1BA1 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}}