Waveshare
8-ch Ethernet Relay Module, Modbus RTU/Modbus TCP Protocol, PoE port Communication, With Various Isolation And Protection Circuits
An industrial-grade 8-channel relay module controlled via Ethernet, supporting Modbus RTU and Modbus TCP protocols. Features PoE power supply (IEEE 802.3af),...
An industrial-grade 8-channel relay module controlled via Ethernet, supporting Modbus RTU and Modbus TCP protocols. Features PoE power supply (IEEE 802.3af), optocoupler isolation, reverse-polarity protection, and a rail-mounted ABS enclosure for safe, easy installation.
Supports multiple communication modes including TCP Server/Client, UDP, HTTP, and MQTT (with Alibaba Cloud demo). Configuration is available via software or web browser. DHCP and DNS are supported for flexible network deployment.
Key Features
- 8-Channel Relay – Contact rating up to 10A 250VAC / 30VDC
- Ethernet Control – Modbus RTU and Modbus TCP protocols
- PoE Power Supply – IEEE 802.3af compliant
- MQTT Support – For IoT and cloud integration
- Flash On/Off – Timed relay control via command arguments
- Optocoupler Isolation – Prevents high-voltage interference
- Reverse-Polarity Protection – Prevents damage from incorrect wiring
- Rail-Mount ABS Case – Industrial DIN rail installation
Power Options
- PoE – IEEE 802.3af via Ethernet port
- DC Power Jack – 12V plug (adapter not included)
- Screw Terminal – 7–36V DC wide range input
Communication Modes
- TCP Server / TCP Client
- UDP / UDP Multicast
- HTTP / MQTT
- Modbus RTU / Modbus TCP
Ideal For
- Smart home automation (lighting, appliances, door curtains)
- Smart agriculture (solenoid valves, motors, water pumps)
- Industrial control systems
Package Contents
- 1× Modbus POE ETH Relay (in rail-mount case)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- DIN rail
- DIN rail is a standard metal mounting rail used inside industrial electrical cabinets. DIN rail mounting matters because it lets the controller be installed neatly alongside power supplies, relays, and other automation hardware.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs, and automation devices. Modbus support matters because it can make the controller easier to integrate with existing industrial equipment.
- Modbus RTU
- Modbus RTU is a version of Modbus commonly used over RS485 serial wiring. It matters if you need to connect the controller to industrial sensors, meters, or drives that use serial Modbus rather than Ethernet.
- Modbus TCP
- Modbus TCP is a version of Modbus that runs over Ethernet networks. It matters when connecting the controller to industrial systems that communicate over standard network cabling.
- MQTT
- A lightweight messaging protocol often used for IoT devices to publish and receive data through a server called a broker. It matters for home automation and sensor networks because it is simple, efficient, and widely supported.
- PoE
- Power over Ethernet lets one Ethernet cable carry both network data and electrical power. This is useful when installing a device where running a separate power adaptor would be difficult.
Find this product in
Robotics & Motion
