The model AC1385 is a 10 foot RS-232C serial cable which has a 9-pin female DB-9 connector that connects to 9-pin serial ports on the host processor. The other end of the cable is a 25-pin DB-25 male connector which plugs into a 6BP01-2, 6BP04-2, 6BP04HV-2 or 6BP16-2 backplane or a 6B50-2 board. Pins 2, 3 and 5 on the DB-9 connector are connected to pins 3, 2 and 7, respectively on the DB-25 connector.