Waveshare Modbus RTU 8 Channel Relay Module RS485
Waveshare Industrial Modbus RTU 8 Channel Relay Module RS485 This is an industrial 8-channel Modbus relay module that is controlled by an RS485 bus and uses the Modbus RTU protocol. This 8 channel Modbus relay board has embedded protection circuits like power isolation, ADI magnetic isolation, TVS diode, and so on. It also includes an ABS enclosure. The Modbus RTU Relay is extremely simple to use. The Modbus relay module is an ideal choice for industrial control equipment and/or applications with high communication requirements due to its fast communication, stability, reliability, and safety. A reverse-proof circuit that prevents the circuit from accidentally being damaged by an incorrect connection. The MCU status and signal transceiving status are indicated by 3 LEDs, they are: LED indicators used: STA: MCU indicator, keep flashing when the MCU normally working TXD: TX indicator, light up when sending data RXD: RX indicator, light up when receiving data Also, read our blog on Applications of Relay explaining 8 major applications, what is it, how does it works, its construction, and different types of relays. Features Configurable device address (1~255) allows multiple devices to cascade on the RS485 bus. Flash-on, flash-off function enables automatic relay shutdown after a set time. Built-in isolated power supply ensures stable voltage without extra power. ADI magnetic isolation for high reliability, strong anti-interference, and low power consumption. TVS protection suppresses surge and transient spike voltage for lightning-proof and anti-static safety. Optocoupler isolation prevents interference from high-voltage circuits. Reverse-proof circuit protects against damage from incorrect wiring. High-quality relay with ?10A 250VAC/30VDC contact rating. Rail-mounted ABS plastic enclosure for easy installation and safety. Three LED indicators display MCU and signal transmission status. What’s On Board: Hardware Diagram of Industrial Modbus RTU 8-ch Relay Module Applications: Industrial Control - Valve control, pump station control, unattended industrial control system Smart Home - Controlling appliances like air conditioner, access control, purifier, water heater, and so on Intelligent Agriculture - Controlling door curtain motor, air blower, and so on Breeding And Farming - Controlling ventilator, lighting, water supply, feeding system, and so on
- Industrial 8-channel relay module controlled via RS485 using Modbus RTU protocol.
- Fast, stable, and reliable communication, ideal for industrial control applications.
- Configurable device address (1~255) supports multiple devices on the RS485 bus.
- Flash-on, flash-off function allows automatic relay shutdown after a set time.
- Built-in power isolation ensures stable voltage without extra power supply.
- High-quality relay with a contact rating of ≤10A 250VAC/30VDC.
- Rail-mounted ABS enclosure for easy installation and safety.
- Power supply voltage 5V Relay
- Communication interface RS485
- Baudrate 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
- Default communication format 9600, N, 8, 1
- Relay channel 8
- Contact form 1NO 1NC
- Communication protocol Standard Modbus RTU protocol
- RS485 address 1~255
- RS485 terminal protection 600W lightning-proof and surge-suppress, 15KV ESD protection (reserved 120R balancing resistor solder pads)
- Dimensions (mm) 145 x 90 x 40 (L x W x H)
- Weight (gm) 344