Giant 20' x 3' x 2' router build

[EddyCurrent]

I though Charlie had been advised which switches to use, but anyway for inductive proximity switches my advice would be 3 wire NPN, this is a useful thread Charlie; http://www.mycncuk.com/threads/7723-...0012#post60012

[JAZZCNC]

I though Charlie had been advised which switches to use, but anyway for inductive proximity switches my advice would be 3 wire NPN, this is a useful thread Charlie; http://www.mycncuk.com/threads/7723-...0012#post60012

Unlike most Bob's the Csmio I/O's are not restricted on switch type or a set voltage/current so can use any Logic so PNP or NPN doesn't matter. NPN or PNP both do the same job they switch a circuit, just one sinks and one sources and the Csmio inputs accept either.
For instance input one could use PNP @ 6V and Input two NPN @ 24v provided they both have there own voltage source.

This one reason why it's used so often on retro fits as it can use Odd ball logic and voltages of Bespoke controllers etc.!