Features
Configurable device address (1~255), multi devices can be cascaded on RS485 bus
Features flash-on, flash-off function, by passing argument to the command, it is possible to turn on the relay for a while and then close it automatically
Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
Onboard unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption
Onboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, provides over-current/over-voltage proof, lightningproof & anti-electrostatic
Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit
Onboard dedicated relay driver chip, with built-in freewheeling diode protection, the driving ability is stronger and more stable
Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection
High quality relay, contact rating: ≤10A 250VAC/30VDC
Rail-mounted ABS case, easy to install, safe to use
3 LEDs for indicating the MCU status and signal transceiving status

Specifications
Operating voltage: 5V
Communication interface: RS485
baudrate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
Default communication format : 9600, N, 8, 1
Relay channels: 16
Contact form : 1NO 1NC
Communication protocol : Standard Modbus RTU protocol
RS485 address : 1~255
LED indicators :
STA: MCU indicator, keep flashing when the MCU normally working
TXD: TX indicator, lights up when sending data
RXD: RX indicator, lights up when receiving data

How-to-use document/User Manual ://bit.ly/3QdyYo9

Package Content
Modbus RTU Relay 16CH x1
US plug 5V 2A Power supply (with EU head adapter) x1