[padobranac]

Is there any way to connect some external switch (as input) or some LED/relay (as output) to Fanuc 0M-C? Some free interface I/O ports that could be controlled through NC?

This should be used for e.g. touch probe signal (as input), some external accessory (through some relay)....

That probably depends on installed board or something?

[Al_The_Man]

Spare inputs and outputs can be used but requires programming of the PMC using Fanuc software etc.
The skip input should already be present for touch probe, this is a dedicated input when used with G31.
Al.

[padobranac]

I just found something in parameters book "tool skip signal TLSKP (G140, #0)". That's it?

Where can I found phycisal possition of that input/connector, in Fanuc manual or machine manual (Kia)?

EDIT: Probably I have to found some X adress that is "connected" to G140 in Ladder, am I right?

[Al_The_Man]

I show the dedicated skip input as X8.7, normally this does not need any further PMC addition to use it, as long as the MTB has not used it for a general input.
Al.