4 Way 5V Relay Shield Module Relay Control Board Relay Expansion
Module features are as follows:
Standard For Shield interfaces and shape
Can continue to stack other For expansion boards
3 M3 screw positioning holes for easy installation
High Drive (5V or 3.3V) normally open contact closure
Onboard relay indicator (red)
Special Note: When using the For UNO board connected to it, because UNO USB interface is extremely high, should avoid green terminals are shorted its shell.
Relay Shield Interface:
Relay: 5V DC relay ,
Power Interface : 5V DC power interface
Indicator: four lights are red when the relay is driven high , the corresponding indicator will light up .
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