How to hook up Nason pressure switch

[Damaku250]

When hooking it up, as far as I can understand it goes in a digital I/O port on the digital sidecar, but is there a difference as to which wire (signal or ground) you connect to which terminal (NC or C) ?

[Al Skierkiewicz]

Originally Posted by Damaku250

When hooking it up, as far as I can understand it goes in a digital I/O port on the digital sidecar, but is there a difference as to which wire (signal or ground) you connect to which terminal (NC or C) ?

Craig,
It is a simple switch so there is no polarity issues. There is no active circuitry inside.

[Alan Anderson]

Electrically it makes no difference.

If you want to be a stickler for convention, however, the "C" stands for Common and ought to be wired to ground. The "NC" or Normally Closed contact ought to be wired to the signal input pin.

[Al Skierkiewicz]

Alan,
In this case "common" refers to a physical part of a switch rather than power supply. Is it rarely used in a single pole single throw switch but may appear on switch bodies that are used for many different products. Depending on the designer and the circuit used, the "common" terminal could be connected to the power supply rail.

[Damaku250]

Ah, thanks a lot everyone!