Beichen BCNet‑Q Ethernet Module for Mitsubishi Q‑Series PLC

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Ethernet communication module enabling Ethernet/ModbusTCP connectivity for Mitsubishi Q-Series PLCs—ideal for industrial SCADA links.

Product Overview
The Beichen BCNet‑Q is a rail-mounted Ethernet module designed for Mitsubishi Q-Series PLCs without disrupting the MD6 round programming port. It connects via COM1 to the PLC and provides COM2 extension for HMI, while offering Ethernet (MC/ModbusTCP) for high-level SCADA systems . It supports GX Works2, GX Developer, ModbusTCP (FC1/2/3/5/6/16), MC protocol, BCNetTCP/IP pass-through, and web-based configuration. Six simultaneous host connections and firmware updates via Ethernet make it versatile for monitoring and industrial communications .

How to Use

  1. Snap onto a 35 mm DIN rail.
  2. Connect COM1 to the PLC’s MD6 port; use COM2 for HMI.
  3. Plug Ethernet cable into RJ45 and assign IP via web UI or BCDevice.
  4. Select protocol (MELSOFT, ModbusTCP, MC, pass-through) as needed.
  5. Configure target devices (SCADA, OPC, HMI) to link via the module’s IP and ports.
  6. Validate communications using GX Works2 or diagnostic tools.
  7. Perform firmware updates over Ethernet when available.

Frequently Asked Questions

  1. What PLCs is BCNet‑Q for? Mitsubishi Q-Series PLCs with MD6 ports.
  2. Does it need external power? No; draws power from DIN rail.
  3. Ethernet protocols supported? MELSOFT (MC), ModbusTCP, BCNetTCP/IP.
  4. Can it handle multiple hosts? Yes—up to 6 concurrent connections.
  5. How to set up? Use built-in web server or BCDevice tool.
  6. Does it support firmware updates? Yes, via Ethernet interface.
  7. What connectors are provided? MD6 round COM ports and RJ45 Ethernet.
  8. Can I connect SCADA/OPC? Yes—compatible with OPC servers like KepWare.
  9. Does it disrupt PLC programming port? No—COM1 reserved; programming remains separate.
  10. Good for HMI integration? Yes—COM2 is dedicated for HMI connections.

User Review Summary
Users on eBay report stable Ethernet integration in production systems, highlighting sturdy build and multi-protocol support. The value at around US $189 is considered fair. Rarely, initial setup may require proper IP addressing.

Comparison with Competing Products
• XCNet‑MIT (Beichen): Similar but adds LAN1/LAN2 switch/NAT and requires 24 V DC power—useful for complex networks.
• BCNet‑FX (Mitsubishi FX Series): Serves FX PLCs with RS232/NET; BCNet‑Q is optimized for Q‑Series with round port.
• Generic RS232-Ethernet converters: Cheaper but lack automation-focused protocols, simultaneous SCADA support, or DIN rail form factor.

Technical Specifications
• Mounting: 35 mm DIN rail
• Ports: COM1 (PLC MD6), COM2 (HMI), 1× RJ45 Ethernet
• Protocols: MELSOFT, MC, ModbusTCP (FC1/2/3/5/6/16), BCNetTCP pass‑through
• Hosts: up to 6 simultaneous
• Configuration: Web UI, BCDevice software
• Firmware: Updatable over Ethernet
• Power: Draws from rail (no external supply)
• Dimensions: Compact DIN form factor

Brand or Manufacturer Info
Beichen Automation, headquartered in Wuxi, China, specializes in industrial connectivity modules (BCNet/XCNet series) across multiple PLC brands, focusing on modular Ethernet-M bus integration solutions .

Purchase Recommendations
Beichen：https://www.beichen.store/bcnet-q/

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