ttyUSB1    interface rs232 tty "" "" 9600 8 N 1 N 0x0a 0x0a 5 0x0 /dev/ttyUSB1
k2400      interface generic keithley2400 "" "" ttyUSB1
k2400_ain  device analog_input keithley2400_ainput "" "" 0 1 0 units 0x0 0 "" k2400 2
k2400_aout device analog_output keithley2400_aoutput "" "" 0 1 0 units 0x0 k2400 0
k2400_dout device digital_output keithley2400_doutput "" "" 0 k2400