Please how do I wire a 3 pin rocker switch to a plc input card?

Normally, a 3-pin rocker switch can be wired as such.
(+) pin to 24 VDC power supply (+); may ne called "in" or "source"
(-) pin to ground
(s) pin to PLC input channel. This pin may be called "signal", "accessory", "out", etc.

When you connect to the (+) side of the power supply, you must use the same circuit that is wired to the PLC card.

Hello Scott, thank you for replying back. What will the connection be when the IO card is internally sourced?