Modbus 16-Kanal Relaymodul RS485 Internface - multiple isolation protection circuits

An industrial 16-channel relay module controlled via the RS485 bus and using Modbus RTU protocol. It features built-in protection circuits including isolated power supply, magnetic isolation, resettable fuse, TVS diode, etc.

The Modbus RTU 16-channel relay module is user-friendly and ideal for industrial control systems and applications with high communication demands due to its fast communication, stability, reliability, and security.

• Configurable addresses (1~255), multiple devices can be cascaded on the RS485 bus.
• Supports Flash-On-Off function by passing arguments as command, allowing the relay to be turned on for a period and then automatically off.
• Isolated power supply provides stable isolated voltage without additional power supply.
• Magnetic isolation enables signal isolation, offering high reliability, strong anti-interference capability, and low power consumption.
• Built-in resettable fuse and TVS diode effectively suppress voltage spikes and transients, protecting against overcurrent, overvoltage, lightning, and electrostatic discharge.
• Isolated optocoupler prevents relay from being disturbed by high-voltage circuits.
• Dedicated relay chip with built-in freewheeling diode protection enhances driver capability and stability.
• Reverse protection circuit prevents accidental damage to the circuit due to incorrect connections.
• High-quality relay, contact rating: ≤10A 250VAC/30VDC.
• DIN rail mounted ABS enclosure, easy to install and safe to use.
• 3 LEDs for indicating MCU status and signal transmission status.

Specifications

• Operating Voltage: 5V
• Communication Interface: RS485
• DIN Rail Mounting
• Dimensions: 200 x 110.9 x 59.1 mm
• Baud Rates: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
• Standard Communication Format: 9600, N, 8, 1 (Baud Rate, Parity, Data Bits, Stop Bits)
• Relay Channels: 16
• Contact Form: 1 Normal Open (1NO) and 1 Normal Closed (1NC)
• Communication Protocol: Standard Modbus RTU Protocol
• RS485 Address: 1 to 255
• LED Indicators:
  • STA: MCU indicator, flashes continuously when MCU operates normally.
  • TXD: TX indicator, lights up when data is being transmitted.
  • RXD: RX indicator, lights up when data is being received.

Documents