ACU-RITE MILLPWR 2 Axes - Manual (Page 209)

REMOTE STORAGE
MILLPWR ®
Connecting MILLPWR to a PC
Connect one end of the cable into the serial connector located on the rear of MILLPWR
operator console. Connect the opposite end of the cable into an available COM port on
a PC.
Note: The COM port must be available—that is, not already assigned a piece of hardware.
You cannot simply disconnect a piece of hardware and connect the serial cable. If
there's no COM port recognized as being available by a PC, then you will need to
make one available (consult a PC owner's manual).
Operation Manual 8-2
Power down both MILLPWR and your PC before connecting
the serial cable.