Provide connection from the RS-232 port on any FreeZone 2.5, 4.5, 6, 12 or 18 Liter Freeze Dryer or FreeZone Bulk Tray Dryer to an IBM-compatible, user-supplied computer. An RS-232 Cable may also be connected to the RS-232 port on the FreeZone Stoppering Tray Dryer connected to a computer; however, the Interconnect Cable 7353403 included with the Stoppering Tray Dryer is recommended since it allows the Stoppering Tray Dryer to communicate with the Freeze Dryer.