Quote:
Originally Posted by Unoquadium
The switch has 3 contacts, NC2, NC3, and COM1. Which one would go to signal and which one to ground?
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Read the labels again. I think you'll find that terminal 1 is labeled COM (for COMmon), terminal 2 is NC (for Normally Closed), and terminal 3 is N
O (for Normally Open).
Typically, COM is connected to ground, and either NC or NO is connected to signal depending on whether you want the input to read "true" or "false" when the switch is activated.