Waveshare Industrial Modbus RTU 8-ch Relay Module, RS485 Bus

Waveshare 17658 Industrial Modbus RTU 8-Channel Relay Module with RS485 Interface, Multiple Isolation Protection Circuits, 5V Power Supply

An industrial 8-channel relay module controlled via an RS485 bus and using the Modbus RTU protocol. It features integrated protection circuits such as current isolation, magnetic isolation, and TVS diodes. It also comes with an ABS enclosure. The Modbus RTU relay is very easy to use. Its fast communication, stability, reliability, and security make it the ideal choice for industrial control devices and/or applications with high communication requirements.

Features:

• Configurable device address (1~255), multiple devices can be cascaded on the RS485 bus.
  
• It features a flash-on and flash-off function. By passing an argument to the command, it is possible to turn the relay on for a specific time and then close it automatically again.
  
• Integrated unibody power supply isolation, provides stable isolated voltage, no additional power supply required for the isolated port.
  
• Integrated magnetic isolation, enables signal isolation, high reliability, strong anti-interference, low power consumption
  
• Built-in resettable fuse and TVS (Transient Voltage Suppressor), effectively suppresses overvoltages and transient voltage spikes in the circuit, provides overcurrent/overvoltage protection, lightning protection and anti-static
  
• Integrated optocoupler isolation prevents the relay from being disturbed by high-voltage circuits
  
• Reverse polarity protection prevents the circuit from being accidentally damaged by incorrect connections
  
• High-quality relay, contact load capacity: ≤10 A 250 VAC/30 VDC
  
• Rail-mounted ABS plastic housing, easy to install, safe to use
  
• 3 LEDs to display MCU status and signal transmission status

Specifications:

• Product: Modbus RTU Relay
  
• Power supply: 5 V
  
• Communication interface: RS485
  
• Baud rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
  
• Standard communication format: 9600, N, 8, 1
  
• Relay channels: 8
  
• Contact form: 1NO 1NC
  
• Contact load capacity: ≤ 10 A 250 VAC / 30 VDC
  
• Communication protocol: Standard Modbus RTU protocol
  
• RS485 address: 1 ~ 255
  
• LED indicators:
  
  • STA: MCU indicator, flashes when the MCU is working normally.
    
  • TXD: TX indicator, lights when sending data.
    
  • RXD: RX indicator, lights when receiving data.

For further technical details please visit the manufacturer’s product page.