LAOS Laser

Hello every one,

I am Daniël Kluun from Landstede Hardewijk Netherland.
For school i have to design a lasercutter.
After some orientation we decided to use the LAOS mainboard V0.5.

My question is how connect the mainboard with the laser power supply.
I already know how to PWM and the servo's connect, but i don't know what the exhaust enable, laser enable and laser on are for.

Here is also a pfd with the wiring scheme what we have.