Modbus RTU 16-channel relay module, RS485 interface

Waveshare 24921 Modbus RTU 16-Channel Relay Module, RS485 Interface, with Multiple Isolation Protection Circuits, Industrial Grade, Rail Mount

Industrial 16-channel relay module, controlled via RS485 bus, uses Modbus RTU protocol, has built-in protection circuits such as power supply isolation, magnetic isolation, resettable fuse and TVS diode, etc. It also comes with an ABS enclosure.

The Modbus RTU 16-channel 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 relay interference from high-voltage circuits
• Integrated dedicated relay driver chip with built-in freewheeling diode protection, stronger and more stable driving performance.
• Reverse polarity protection circuit prevents accidental damage to the circuit due to incorrect connections.
  High quality relay, contact load capacity: ≤10 A 250 VAC/30 VDC.
• Rail-mounted ABS housing, easy to install, safe to use.
• 3 LEDs to display MCU status and signal transmission status.

Specifications:

• Operating voltage: 5V
• Communication interface: RS485
• Baud rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
• Standard communication format: 9600, N, 8, 1
• Relay channels: 16
• Communication protocol: Standard Modbus RTU protocol
• RS485 address: 1 to 255
• LED displays:
  • STA: MCU indicator, continues to flash when the MCU is working normally
  • TXD: TX indicator, lights up when sending data
  • RXD: RX indicator, lights up when data is received

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