# Does there exists “3 state” relay switch, with 3 input pins?

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

• ansaldo-sts.com/sites/ansaldosts/files/manuali-ansaldo/… – Bruce Abbott Jan 19 '18 at 2:11
• a relay is an electrically operated switch. there is no input pin or output pin. there are just mechanical contacts that short pins together, same as if you touch wires together using your hands. – jsotola Jan 19 '18 at 2:29
• jsotola, sure. i mean when using it as a logic gate you would end up with logical inputs and logical output – user149105 Jan 19 '18 at 16:02