Posted 4 Sep 2015 Use to working on DC inputs, now I have a PLC I am playing with and the digital inputs are AC, can I still just wire a on/off switch to complete the circuit just for testing? This is a micrologix 1100. Share this post Link to post Share on other sites
Posted 4 Sep 2015 Let's make sure your MicroLogix can handle AC. What's the part number of the PLC or module that you're hooking this to? Share this post Link to post Share on other sites
Posted 4 Sep 2015 Then yes. Normally I would feed one side of the switch with 120VAC, take the other side of the switch to your input, then take the common for that input group to neutral. Share this post Link to post Share on other sites