4Channel Relay Module with Optocoupler

4Channel Relay Module with Optocoupler

Electrical parameters:
Supply voltage: 5VDC
Current: greater than 100mA
Load: 250V 10A AC or 30V 10A DC

Wiring instructions:
VCC: system power supply positive
GND: system power supply negative
IN1–IN2-IN3-1N4: Relay Control Port
(Do not reverse, causing the module to burn out and we will not return it.)