2 Channel RS485 Relay Board UART Serial Port Switch Module Modbus Remote Control for PLC Smart Home

Description: - Power Supply: DC 12V - Standby current (all relays closed) 7-8mA, 1 relay open 40mA, 2 relays open 73mA. - open close Momentary Self-locking Interlock Delay 6 Commands - Two instruction-control mode : AT command and MODBUS command - Under the AT command ,the maximum delay is 9999 seconds,Under the MODBUS command ,the maximum delay is 255 seconds - AT commands can be made serial HyperTerminal (serial assistant) Enter;MODBUS commands can be made serial HyperTerminal (serial assistant) OR Modbus Poll Enter; - Under the MODBUS command mode, it can support up to 32 devices in parallel. - Maximum load: 10A / 250VAC, 10A / 125VAC, 10A / 30VDC, 10A / 28VDC, 10A / 12VDC. - Size: 79 x 47.5 x 19.5mm Application: Automated industry PLC; Smart Home,Home Automation ,Wiser Home; Identification system; Motor FW & BW. Typical Applications: 1. AT command mode (A5 = OFF), in this mode can be through the serial HyperTerminal (serial assistant) enter a simple AT command control relay. AT command mode time up to 9999 seconds

2. MODBUS command mode (A5 = ON), you can control a variety of ways: Serial Hyper Terminal Control (need to manually add the CRC), Modbus Poll software control (software automatically add the CRC), PLC or MCU process control

Wiring Diagram:

1. DC 12V control circuit,Wiring diagram below. LOAD may be camera,LED lights, fans, motors and other DC 12V equipment

2. DC 12V motor reversing control, Wiring diagram below. LOAD can be Fans,motors, pumps and other DC 12V equipment

3. DC 1-48V OR AC 85-265V control circuit,Wiring diagram below(Note:If not DC 12V load, need another DC 12V power supply). LOAD may be LED lights, fans, motors Lights, fluorescent lights, solar water heaters and other DC AC equipmen

4. DC 1-48V OR AC 85-265V control circuit,Wiring diagram below(Note:If not DC 12V load, need another DC 12V power supply). LOAD may be Machine tool ,CNC,3D Printer,LED lights, fans, motors and other DC AC equipment

Test Software:
Serial HyperTerminal: Modbus Poll

Package Included:

1 x2 Channel RS485 Relay Board UART Serial Port Switch Module