EdingCNC CPU5A4E Manual page 4

Jumper settings
Jumpers
The yellow marked jumpers are the only ones
interesting to you. The others should be left
untouched.
Lower left (USBPWR) is set if the board is powered by
the USB voltage.
Remove if you want to power externally.
External POWER can be applied on the SUBD 25
connector (PIN 20-21, 22-25). And also on the SUBD 9
connector (PIN 7, 8-9), see table above.
(*)
These power lines can also be used to drive the
step/dir/amp-enable inputs of your drive of needed.
When using the supply lines on the SUBD 25 the
solder jumpers on the bottom side must be
connected.
They are not standard connected because of
compatibility with other parallel port based CNC
controls where these pins are connected to GND.