Normally relay has 5 pins: 2 control pin (signal and ground), 2 input pins, and 1 output. If there is voltage on control pin relative to grounded pin output is connected to first pin, if there is no – to second.
I wonder does there exists relay with 6 pins and 3 inputs, so that
- if positive voltage presents on control pin => output is connected to first input
- if no voltage (grounded) => output to second input
- if negative voltage => output to third
Best Answer
It's really more like two relays in one case, but this Panasonic part is similar to what you are requesting:
You could wire the coils with diodes to do what you specifically request.