All Windings Off setting, Camtronics 5A boards

Hello

I was just curious about the best way to use this feature. Is this
where you hook up an emergency "kill" button for safety? Does this do like
it says and remove all current to the stepper motors?

Anyone hooked up this feature before? As you can guess, I am very
new to the cnc hardware, and I have built Dan Mauch's 3 axis, 5 amp boards,
but only bench tested the voltage readings. I haven't actually hooked up any
stepper mototrs yet.

Thanks for any help about the AWO pins.

Tom.