The Model AC1382 is a 10-foot cable that is required to connect a 25-pin RS-232C serial port from a host processor to a 6BP01-2, 6BP04-2, 6BP04HV-2 or 6BP16-2 backplane or a 6B50-2 board. The RS-232C connector is a female 25-pin DB-25. The 6BPXX-2 backplanes and the 6B50-2 digital board connectors are a male 25-pin DB-25. Only pins 1, 2, 3 and 7 (connected one-to-one) are connected.