Optical Oscillator for driver board

[JimGlass]

I'm looking for a special relay to do switching for my CNC driver board (Xylotec). I was told the relays are called Optical Oscillators. In some way the 5 volt computer voltage is switched through this type relay using light instead of voltage.

I would like to have the software turn on my spindle/coolant and also send inputs to the software for operator interface.

Optical Oscillator could be the wrong term.

Thanks for any ideas,
Jim

[Andre]

I think one of these is what you are looking for.

DigiKey Optoisolator

DigiKey Solid State Relays


Andre'