This is an industrial 8-channel relay module controlled via the RS485 data bus, using the Modbus RTU protocol. It features embedded protection circuits such as power isolation, ADI magnetic isolation, and TVS diodes. It also comes with an ABS case.
The use of the Modbus RTU Relay is straightforward and is an ideal choice for industrial control equipment and applications with high communication requirements due to its fast communication, stability, reliability, and security.
Features
- Configurable device address (1~255), multiple devices can be cascaded on the RS485 data bus.
- Flash-on, flash-off function allows the relay to be automatically turned on and then off after a specified time by sending a command argument.
- Built-in single power supply isolation provides stable isolated voltage without the need for an additional power supply for isolated terminals.
- Built-in single ADI magnetic isolation provides signal isolation, ensuring high reliability, strong anti-interference, and low power consumption.
- Built-in TVS (Transient Voltage Suppressor) effectively suppresses voltage fluctuations and transient surge voltages in the circuit, making it lightning-resistant and anti-electrostatic.
- Built-in optocoupler isolation prevents interference from external high-voltage circuits connected to the relay.
- Reverse-tolerant circuit prevents accidental damage to the circuit due to incorrect connections.
- High-quality relay with contact rating: ≤10A 250VAC/30VDC.
- DIN rail-mounted ABS plastic enclosure for easy installation and safe use.
- 3 LEDs to display MCU status and signal reception status.
Hardware Specifications
- Power Supply Voltage: 5V
- Communication Interface: RS485
- Baud Rates: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
- Default Communication Format: 9600, N, 8, 1
- Relay Channels: 8
- Communication Form: 1NO 1NC (1 Normally Open, 1 Normally Closed)
- Communication Protocol: Standard Modbus RTU protocol
- RS485 Address: 1~255
- RS485 Terminal Protection: 600W lightning-resistant and overvoltage protection, 15KV ESD protection (separate 120R balancing resistance solder pads)
- LED Indicators:
- STA: MCU indicator, flashes continuously while MCU is operating normally.
- TXD: TX indicator, lights up when data is being transmitted.
- RXD: RX indicator, lights up when data is being received.
EN − TL
