{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FX3U-48MT/DSS","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"FX3U-48MT-DSS","canonicalUrl":"https://aoctrl.com/mitsubishi/FX3U-48MT-DSS","factsUrl":"https://aoctrl.com/api/mcp/products/FX3U-48MT%2FDSS","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi MELSEC-F Series, FX3U base unit, 24 DC inputs, 24 transistor source outputs, 64K steps RAM, expandable to 256 local I/O points.","salesMarkdown":"## Base unit spec at a glance The FX3U-48MT/DSS is a MELSEC-F series base unit: 24 DC 24 V inputs and 24 transistor source outputs on-board, with program memory of 64K steps held in battery-backed RAM. Expandable to 256 local I/O points (384 including remote), it fits a mid-sized machine slice. Runs a 65-ns LD scan and 642-ns MOV at peak, so cycle time is tight enough for most high-speed sensor arrays. The 35 W draw at 24 V DC and IP10 protection class are typical for a panel-mount PLC. The USB port is listed as OPTION — not populated on every unit; confirm with your order if USB programming is needed. RS-422 is standard. ## Panel fit and expansion notes Mounts with a buffer battery for RAM retention. Ambient range 0 to 55 °C, but consider derating if multiple expansion units are stacked. Expansion bus supports up to 256 local I/O points. Planning the backplane current draw is straightforward at 35 W total from the 24 V DC supply.","metaTitle":"Mitsubishi FX3U-48MT/DSS PLC Base Unit, 24 VDC, 48 I/O","metaDescription":"Mitsubishi MELSEC-F FX3U base unit with 24 DC inputs, 24 transistor source outputs, 64K steps RAM, mature lifecycle, expandable to 256 local I/O. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"USB":"OPTION","Type":"FX3U","title":"FX3U-48MT/DSS","RS-422":"1","Series":"MELSEC-F SERIES","Weight":"0,85 kg","Expandable":"YES","Output Type":"TRANSISTOR","description":"MAIN UNIT","Current Type":"DC","Output Logic":"SOURCE","Buffer Battery":"YES","Program Memory":"64K STEPS","Shipping Weight":"2 Kg","lifecycle_stage":"mature","Local I/O Points":"256","Power Supply (V)":"24","Protection Class":"IP10","Cycle Time LD (ns)":"65","Cycle Time MOV (ns)":"642","Estimated Lead Time":"1 - 10 Working Days","Program Memory Unit":"RAM","Power Consumption (W)":"35","Integrated Digital Inputs":"24","Local + Remote I/O Points":"384","Integrated Digital Outputs":"24","PLC, FX3U Base Unit DC 24 V":"24 inputs DC 24 V; 24 transistor outputs","Max. Ambient Temperature (°C)":"55","Min. Ambient Temperature (°C)":"0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$302.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2eeb21a015b33b764ec1572a6de5453f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does the FX3U-48MT/DSS include USB?","answer":"USB is listed as an option. Many units ship without on-board USB; confirm with the order code or request a version that includes it if USB programming is required. RS-422 is standard."},{"question":"Will the FX3U-48MT/DSS drop into a panel designed for an FX2N-48ER-DS without rewiring?","answer":"No. The FX3U is a base unit (CPU) while the FX2N-48ER-DS is an extension unit with relay outputs. The form factor, mounting, and wiring of the output power circuit differ. A panel redesign or re-termination would be needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/FX3U-48MT-DSS","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/mitsubishi/FX3U-48MT-DSS 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}}