Oki RS-422 - Manual (Page 10)

1-4 RS-232C/RS-422 Serial Interface Option
Installing the RS-232C/RS-422 Serial Interface in OKI B6100 Printers
6. While aligning the front bracket of the serial interface assembly to the two respective thumbscrews
on the controller assembly bracket, firmly seat the 80-pin male connector on the underside of the
interface to the 80-pin female connector on the controller assembly.
7. Secure the serial interface assembly to the controller bracket by tightening the two smaller thumb-
screws in a clockwise direction.