{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FX5-232-BD","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"FX5-232-BD","canonicalUrl":"https://aoctrl.com/mitsubishi/FX5-232-BD","factsUrl":"https://aoctrl.com/api/mcp/products/FX5-232-BD","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi Electric FX5-232-BD serial communication board, RS-232C, 9-pin D-sub male, baud rates 300 to 115200 bps, half/full duplex, 15 m max distance, 0.02 kg.","salesMarkdown":"## Serial interface for the MELSEC iQ-F backplane The FX5-232-BD is a serial communication board that plugs directly into the MELSEC iQ-F series CPU module, adding one RS-232C port via a 9-pin D-sub male connector. It supports baud rates from 300 up to 115200 bps, selectable in standard increments, and handles both half-duplex and full-duplex communication — the full-duplex mode is what you need for a point-to-point link to a drive or HMI without toggling the line direction. Maximum transmission distance is 15 m, which is the RS-232C standard limit at 115200 bps — push the cable longer and you risk bit errors; keep it under 15 m and the link holds deterministic to the cycle. ## Isolation — what it means for the control panel The communication line is not insulated from the CPU module — that means the serial ground is referenced to the PLC logic common, not isolated by a digital isolator or optocoupler. In a panel with drives or inverters on the same serial link, this non-isolation means ground loops can inject common-mode noise into the CPU backplane if the cable shield is grounded at both ends. Best practice: ground the shield at one end only, or use an external isolated RS-232 converter if the run crosses a dirty cabinet boundary. ## Active production — sourcing posture No stock-holding claim — sourced per RFQ.","metaTitle":"Mitsubishi Electric FX5-232-BD Serial Communication Board","metaDescription":"Mitsubishi Electric FX5-232-BD serial communication board for MELSEC iQ-F series. RS-232C, 9-pin D-sub male, baud rates up to 115200 bps.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"title":"FX5-232-BD","Weight":"0.02 Kg","Insulation":"Not insulated (Between communication line and CPU module)","Baud rate*1":"300/600/1200/2400/4800/9600/19200/38400/57600/115200 (bps)","Product No.":"FX5-232-BD","description":"Serial Communication Board","Product Type":"Programmable Logic Controller","Shipping Weight":"1.5 Kg","lifecycle_stage":"current","Connection method":"9-pin D-sub, male","Estimated Lead Time":"1-10 working days.","Transmission standard":"Conforming to RS-232C","Communication method*1":"Half-duplex/Full-duplex","Maximum transmission distance":"15 m"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$63.00 – $123.19","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/af1e7fa8e5c04a7565068da871202f9f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the FX5-232-BD?","answer":"The FX5-232-BD is the only RS-232C serial board for the iQ-F backplane; if you need a different serial interface, the FX5-485-BD (RS-485) or FX5-422-BD (RS-422) use the same form factor and backplane connector but a different electrical standard and pinout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/FX5-232-BD","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/FX5-232-BD 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}}