8 Channel Ethernet Relay Module

WaveshareSKU: WAV-24964
Sale price £39.20
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WaveshareModbus RTU 16-Channel Relay Module
Sale price £42.60 incl. VAT excl. VAT

The 8-channel Ethernet Relay Module is a versatile and robust control device designed for industrial and automation projects, offering advanced features and compatibility with various communication protocols. This module provides eight relay channels, each capable of switching high-power electrical loads. These channels can be independently controlled, making them suitable for a wide range of applications.

It supports both Modbus RTU and Modbus TCP communication protocols, enabling seamless integration with industrial automation systems, PLCs, and SCADA systems. It also supports the MQTT (Message Queuing Telemetry Transport) protocol, allowing for efficient and real-time communication with IoT devices and cloud platforms.

The module features a PoE port, which simplifies installation and reduces the need for additional power supplies and wiring. PoE provides both power and data connectivity over a single Ethernet cable, enhancing flexibility in deployment. For safety concerns, there are onboard optocouplers that provide electrical isolation between the relay control circuitry and the external devices connected to the relays. This isolation enhances safety by preventing voltage spikes or surges from affecting the control system.

This module is a versatile and reliable control solution for various industrial and automation applications. Its support for multiple communication protocols, PoE connectivity, optocoupler isolation, and MQTT compatibility makes it a powerful tool for remote monitoring and control. Additionally, the Alibaba Cloud MQTT application demo simplifies the integration of the module into cloud-based IoT solutions, enhancing its usability and functionality.


  • Features flash-on, and flash-off functions, by passing an argument to the command, it is possible to turn on the relay for a while and then close it automatically
  • Supports DC 7~36V wide range power input and PoE power supply supports relay control through MQTT protocol, comes with Alibaba Cloud MQTT application demo
  • Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit
  • Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection
  • High-quality relay, contact rating: ≤10A 250VAC/30VDC
  • Rail-mounted ABS case, easy to install, safe to use
  • 4 LEDs and Network indicators for indicating the MCU status and signal transceiving status

Connection Example - AC 220V Device & DC 30V Device


Power Supply PoE port, DC 5.5*2.1 power port, or Screw terminal (7~36V)
Communication Interface PoE port, IEEE 802.3af compliant
Realy channels 8
Contact Form 1NO 1NC
Contact Rating ≤10A 250VAC/30VDC
Modbus Protocol Modbus RTU Protocol or Modbus TCP Protocol
LED Indicators RUN: Ethernet port indicator, blinking in 2-second cycles when Ethernet port normally working
STA: MCU indicator, blinking when the MCU normally working
TXD: TX indicator, lights up when sending data
RXD: RX indicator, lights up when receiving data



RUN Ethernet port indicator, blinking when Ethernet port normally working STA: MCU indicator, blinking when the MCU normally working
TXD TX indicator, lights up when sending data
RXD RX indicator, lights up when receiving data
Ethernet Port Green Indicator Lights up when the connection is established
Ethernet Port Yellow Indicator Data activity indicator, blinking when transmitting data

Package Contents

  • 1x Ethernet Relay Module

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