Each relay control has its own red indicator LED. The green LED indicates the status of the VCC supply voltage. The control transistor (PNP) has a 1 kΩ base resistor. Relays are rated 10A. The relay coils' operating voltage is 5VDC. Control is performed by connecting the INx pin to the GND pin. The relay changes state and the red LED of that relay lights up. Approximately 4 mA flows through the pin in this state.

Note! Not for professional use. Do not use to control mains-voltage equipment. Only for use with voltages below 50VAC/DC.