12v 4 Channel Relay Module with Optocoupler Relay Output

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Features: 4-channel 12v 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. Uses: Support all MCU control The industrial sector PLC control Smart home control

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