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Mitsubishi FX3U-485-BD RS-485 Communication Expansion Board for FX3U and FX3UC PLCs

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Mitsubishi FX3U-485-BD

by Mitsubishi Electric

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OverviewUnlock advanced serial communication for your Mitsubishi FX3U or FX3UC Series PLC using the Mitsubishi FX3U-485-BD RS-485 Communication Expansion Board. This component allows your programmable logic controller to connect with numerous external devices using the Modbus RTU, non-procedural (no protocol), and inverter protocols. Ideal for complex machine networks, HMI connections, variable frequency drives, and data acquisition, the FX3U-485-BD ensures dependable data exchange. Its compact, internal mounting design saves panel space, optimizing industrial automation footprints while providing high-performance connectivity over 2-wire or 4-wire RS-485 lines.Key Features Flexible Communication: Supports RS-485, a standard for industrial environments. Extensive Protocol Support: Compatible with Modbus RTU, Non-procedural, and Inverter Protocols, offering broad device compatibility. Internal Installation: Designed for an internal board slot, ensuring a secure and space-saving integration within the PLC. Rapid Data Transfer: Achieves speeds up to 115.2 kbps for quick data exchange. Secure Connection: Features a robust terminal block for reliable wiring. Broad Device Compatibility: Connects with HMIs, inverters, sensors, barcode readers, and other serial devices. Technical Specifications Model: FX3U-485-BD Compatible PLCs: Mitsubishi FX3U, FX3UC Series Communication Method: Half-duplex, asynchronous Power Supply: Directly from the PLC main unit Isolation: Non-isolated Wiring Configuration: Supports 2-wire and 4-wire RS-485 setups Operating Temperature: 0°C to 55°C Weight: Approximately 0.05 kg (0.11 lbs) Certifications: Conforms to CE and UL standards ApplicationsThe Mitsubishi FX3U-485-BD is valuable for a wide range of industrial automation applications, including: HMI and Drive Connectivity: Facilitates communication between PLCs and human-machine interfaces or variable frequency drives. Serial Device Integration: Enables connection of various serial devices like sensors, barcode readers, and measurement tools. Machine-to-Machine Communication: Establishes reliable data links between different machines in automated production. Modbus RTU Configurations: Supports both master and slave setups for flexible network topology in Modbus RTU systems. Data Logging and Diagnostics: Essential for collecting operational data and performing remote diagnostics on connected equipment. Why Choose This Model?The Mitsubishi FX3U-485-BD is a superior choice for enhancing your PLC's communication due to several advantages: Easy Integration: Designed for "plug-and-play" installation, it mounts internally into your FX3U/FX3UC PLC, reducing setup time. Simplified Industrial Networking: With Modbus RTU compatibility, this board streamlines networking of diverse industrial devices, improving interoperability and system efficiency. Space-Saving Design: Its compact form factor and internal mounting conserve cabinet space, contributing to a more organized control system. Reliability: Engineered for robust field communication, the FX3U-485-BD ensures stable data transfer in demanding industrial settings. Comprehensive Protocol Support: Offers broad compatibility with multiple protocols for versatile application. Order NowUpgrade your industrial automation system today with the Mitsubishi FX3U-485-BD RS-485 Communication Expansion Board. Enhance your PLC's connectivity and performance.FAQWhat types of PLCs are compatible with the FX3U-485-BD?This communication expansion board is designed for use with Mitsubishi FX3U and FX3UC Series PLCs.What communication protocols does the FX3U-485-BD support?It supports the Modbus RTU protocol, non-procedural (no protocol), and inverter protocols, offering wide compatibility with various industrial devices.Is the FX3U-485-BD difficult to install?No, it is designed for internal, "plug-and-play" installation directly within your FX3U/FX3UC PLC, minimizing setup complexity.Does this board help save space in control panels?Yes, its compact form factor and internal mounting design help conserve valuable cabinet space, leading to a more organized control system layout.

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PRODUCT DETAILS

Mitsubishi FX3U-485-BD

Overview

This is a genuine Mitsubishi Electric component from the MELSEC PLCs family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Mitsubishi Electric catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Mitsubishi Electric automation ecosystem
  • Engineered to integrate inside MELSEC PLCs installations

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Mitsubishi Electric equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Mitsubishi Electric catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Mitsubishi Electric platform with documented conversion notes for the MELSEC PLCs family

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Model: FX3U-485-BD
  • Compatible PLCs: Mitsubishi FX3U, FX3UC Series
  • Communication Method: Half-duplex, asynchronous
  • Power Supply: Directly from the PLC main unit
  • Isolation: Non-isolated
  • Wiring Configuration: Supports 2-wire and 4-wire RS-485 setups
  • Operating Temperature: 0°C to 55°C
  • Weight: Approximately 0.05 kg (0.11 lbs)
  • Certifications: Conforms to CE and UL standards

Applications

The Mitsubishi FX3U-485-BD is valuable for a wide range of industrial automation applications, including:

  • HMI and Drive Connectivity: Facilitates communication between PLCs and human-machine interfaces or variable frequency drives.
  • Serial Device Integration: Enables connection of various serial devices like sensors, barcode readers, and measurement tools.
  • Machine-to-Machine Communication: Establishes reliable data links between different machines in automated production.
  • Modbus RTU Configurations: Supports both master and slave setups for flexible network topology in Modbus RTU systems.
  • Data Logging and Diagnostics: Essential for collecting operational data and performing remote diagnostics on connected equipment.

Why Choose the FX3U-485-BD?

The Mitsubishi FX3U-485-BD is a superior choice for enhancing your PLC's communication due to several advantages:

  • Easy Integration: Designed for "plug-and-play" installation, it mounts internally into your FX3U/FX3UC PLC, reducing setup time.
  • Simplified Industrial Networking: With Modbus RTU compatibility, this board streamlines networking of diverse industrial devices, improving interoperability and system efficiency.
  • Space-Saving Design: Its compact form factor and internal mounting conserve cabinet space, contributing to a more organized control system.
  • Reliability: Engineered for robust field communication, the FX3U-485-BD ensures stable data transfer in demanding industrial settings.
  • Comprehensive Protocol Support: Offers broad compatibility with multiple protocols for versatile application.

Availability & Shipping

  • In stock: FX3U-485-BD ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every FX3U-485-BD ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Mitsubishi Electric

This communication expansion board is designed for use with Mitsubishi FX3U and FX3UC Series PLCs.

Machine down? We ship parts the same day.

New, surplus, and refurbished Mitsubishi Electric inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

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PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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