hello there
yes I already have a akx250 leafboy77 card
this runs steppers at 5v with 5v for limits, no spindle control.

I have just bought some 200w Panasonic servo motors and drivers

the step and direction will stay 5v from usb power
BUT I think I need 24v from this card to connect limits to servo drives

LOOKING at this card, it APPEARS 'like' its a later version of the 77
it was certainly released after the lb77

its the I/o at 24v that I need for servos I think
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has anyone actually measured the speed at 800 MHz over the 200 max of the akz250

thanmks