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Small rectangular ABS case with Ethernet port and screw terminals

Barrow Mods

Barrow Mods 8-CH Ethernet Relay Module (B) 2 in 1 accessory

SKU CH-J9DV-RJFBT

An industrial 8-channel Ethernet relay module with digital inputs, Modbus RTU/TCP support, PoE and wide-range DC power input, plus isolation and protection circuits

  • 8-channel Ethernet relay control via Modbus RTU/TCP protocols
  • 8 digital inputs with bi-directional optocoupler isolation for noise immunity
  • DC 7–36 V wide-range screw-terminal or IEEE 802.3 af PoE power options
  • TCP Server, Client, UDP, HTTP and MQTT communication modes supported
  • Web-browser and software configuration with DHCP and DNS dynamic addressing

Industrial 8-Channel Ethernet Relay Module

This industrial module provides eight relay outputs and eight digital inputs controlled over an Ethernet connection. It communicates using Modbus RTU and Modbus TCP protocols and supports multiple modes including TCP Server, TCP Client, UDP, HTTP and MQTT. The unit is housed in an ABS rail-mount case for industrial environments.

Replaces standalone relay boards lacking network

The module upgrades systems that previously required separate controllers or direct wiring for each relay. The jump is worth it when you need centralised, protocol-based control over multiple circuits with remote configuration via web browser or software. PoE support simplifies deployment by removing the need for a local power adapter.

Check your network and power infrastructure first

Verify that your switch or injector complies with IEEE 802.3 af PoE if you plan to use PoE power. Alternatively ensure a DC source between 7 and 36 V is available for the screw terminal input. Confirm that your automation software or PLC can speak Modbus RTU or Modbus TCP over Ethernet before ordering.

Highlights

  • 8-channel Ethernet relay control via Modbus RTU/TCP protocols
  • 8 digital inputs with bi-directional optocoupler isolation for noise immunity
  • DC 7–36 V wide-range screw-terminal or IEEE 802.3 af PoE power options
  • TCP Server, Client, UDP, HTTP and MQTT communication modes supported
  • Web-browser and software configuration with DHCP and DNS dynamic addressing

Specifications

No published specifications for this item yet.

Questions about this item

What rail type does the ABS case mount on?

The included ABS case is designed for standard DIN-rail mounting inside a control cabinet.

Which wiring step is most often missed when connecting the screw terminals?

Users frequently forget to tighten the DC 7~36 V screw-terminal connections after inserting the wires, causing intermittent power.

How do I know when the onboard optocoupler isolation has degraded and needs replacement?

The optocouplers are soldered to the board; the module has no user-replaceable isolation components, so the entire unit is swapped if isolation fails.

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