Locking communication cables in place provides strain relief and prevents the cable from disconnecting from the printer. To connect either a USB or RS-232 communications cable to the printer permanently:
Access the communications port on the side of the printer next to the latch release lever.
Plug the connector into the appropriate port and align the plastic locking cap with the cutouts.
Rotate the locking cap clockwise to lock the cable in place. (Rotate counterclockwise to unlock the cable.)
The cable is locked in place.
Only one cable can be present in the USB/RS-232 communications port at a time for strain relief purposes.
