This Relay Module uses genuine high quality relay, normally open interface maximum load: AC 250V / 10A, DC 30V / 10A
Interface:
Input:
VCC: Relay power supply +
GND: Relay power supply -
IN: Signal trigger input (High or Low Level Signal, select via jumper)
Output:
NO: Relay normally open.
COM: Relay Common Pin
NC: Relay normally closed.