1. RS485 interface: This 32-channel relay module with RS485 interface uses RTU protocol, built-in power isolation, magnetic isolation, self-healing fuse and TVS protection circuit.
2. Flash On/Off Function: This RTU relay module supports configurable device addresses (1-255) and allows multiple devices cascade to the RS485 bus. It has a flash-on and flash-off function, which allows the relay to be switched in a while and then automatically closes with command.
3. Resettable Fuse: This RS485 relay module has a built-in resettable fuse and Transient Voltage TVS which can effectively surge and transient nail voltages in the circuit, making it over/surge , - and antistatic.
4. Rail Mount Case: This RTU RS485 relay module adopts rail mount ABS drop, easy to install and safe to use. 3 LED indicators to MCU status and signal transfer/receive status.
5. High safety: This industrial relay module has a dedicated relay driver chip on board, with built-in freewheel diode cover, making driving ability stronger and more stable. Reverse protection circuit, prevent accidental damage to the circuit due to incorrect connection.

Specifications:
Item Type:RTU Relay Module
Material:ABS
Working Voltage:7-36V
Communication interface: RS485
Communication transfer rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
Standard communication formats: 9600, N, 8, 1
Number of relays:32 channels Switch type: 1 normally open, 1 normally closed
Contact load: ≤10A AC or ≤10A 30V DC
Protocol: Standard RTU Protocol
RS485 Address Setting: 1 to 255
Indicator lamp:
STA: MCU indicator flashing when the MCU is working properly
TXD: Transmission Indicator. Indicator lights up when data is shipped
RXD: Receive Indicator. Indicator lights up when data is received
Product size: approx. 300 x 290 x 110 x 100 mm / 11.8 x 11.4 x 4.3 x 3.9 inches (manual measurement, there is a slight error)