Control is done by means of an RS-232C connection to a NK-SCP/A serial interface. Serial port parameters should be set to 9600 baud rate, no parity, 8 data bits, 1 stop bit, CR termination. The Breakaway to use is defined by setting the 'Card' parameter in the driver configuration, with Card 0 = Breakaway 1, Card 1 = Breakaway 2, etc.