4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO
4-channel relay output modules, relay output contacts 250A 10A.
Input IN1, IN2, IN3, IN4, the signal line LOW effective.
VCC, GND power input, can relay a separate power supply relay power input of JD-VCC.
1, support all MCU control.
2, the industrial sector;
3, PLC control;
4, smart home control;
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