[TheCow]

i have a question:
there are some digital sensors we got with the KOP:
the allen bradley photodetectors
the psi sensor that's tripped when pressure gets to 115 psi (correct me if im wrong)
and the limit switch.

the board has digital i\o connections - SIG 5V+ and GND.
my question is, take the limit switch for instance:
how do i connect it to with out short circuiting the board?

thanks in advance.
edit: i understand connecting a sensor to the boards 5v power, and the third leg to the SIG like with the GTS, but what do i do when i dont have a third SIG connection?