8-Channel Relay (B) PoE Ethernet Module RTU/Modbus TCP Protocol

The 8-channel relay (B) from Waveshare is an industrial Ethernet relay module with comprehensive functionality and high reliability. It supports the Modbus RTU and Modbus TCP protocol, enabling efficient communication over Ethernet, ideal for demanding applications in the field of industrial automation. With the PoE function (Power over Ethernet), you do not need an additional power supply, which simplifies installation and reduces space requirements. This module has eight relay channels and eight digital inputs that are protected from interference by bidirectional optocoupler isolation. The digital inputs are suitable for both active and passive circuits and can be flexibly adjusted. With the robust plastic construction and DIN rail mounting option, the module can be safely and easily integrated into industrial environments. Multiple LEDs for status indicators give you a quick overview of the operational status and data communication at any time. The module also supports various communication modes such as TCP Server, TCP Client, UDP, and MQTT, making it versatile. 

Recommended Accessories 

• 12V DC 4000mA Power Supply AC/DC Adapter 5.5mm/2.1mm Connector 
• Ethernet Patch Cable RJ45 Cat.6 Network Cable

Features: 

• The module has eight independent relay channels, providing you with comprehensive control options for multiple devices.  
• The PoE function allows you to power the module directly via Ethernet, simplifying installation.  
• The module is compatible with Modbus RTU and Modbus TCP protocols, allowing you to use it flexibly in different networks.  
• Equipped with eight digital inputs, you can integrate both passive and active circuits, increasing flexibility.  
• The status LEDs provide you with a visual feedback on the communication and module status at any time.
• The bidirectional optocoupler offers protection against interference, enhancing the module's reliability in demanding applications.
• Thanks to the support of multiple communication modes, including MQTT, the module is versatile and easily integrable into IoT systems. 

Application Examples:

• Control and monitoring of production equipment in industrial automation.  
• Integration into IoT systems for remote monitoring and control of relays and sensors.  
• Used as a central control module for security systems to control multiple devices simultaneously. 

Documentation: 

• Waveshare Wiki

Technical Details: 

• Manufacturer: Waveshare  
• Manufacturer SKU: 27876  
• Operating voltage: 7~36V 
• Power connection: PoE connection, DC 5.5x2.1 power connection, screw terminal 
• Communication interface: Ethernet (PoE support) 
• Relay channels: 8CH 
• Relay switching capacity: 10A at 250VAC/30VDC 
• Contact form: 1NO 1NC 
• Communication protocol: TCP/UDP/MQTT 
• Isolation: Onboard bidirectional optocoupler 
• LED indicators: 
• RUN: Ethernet port indicator, blinks every 2 seconds when the Ethernet port is functioning normally 
• STA: MCU indicator, blinks when the MCU is operating normally 
• TXD: TX indicator, lights up when sending data 
• RXD: RX indicator, lights up when receiving data 
• Temperature range: -15°C to 70°C  
• Dimensions: 175 x 90 x 40 mm  
• Weight: 367g  

Package Contents: 

• 1x 8-channel relay (B) PoE Ethernet module