gps = GPS Port
gps_rs232detect = GPS Port detect
system = System
usb0_hvpwrout = USB high-power output
usb1 = Internal USB port
usb_otg = External USB port
usb_otg_peripheral = External USB port (peripheral mode)
tamper_int = Chassis tamper detect
tamper_1 = External tamper 1
tamper_2 = External tamper 2
tamper_3 = External tamper 3
sensor_A = Sensor A
sensor_B = Sensor B
sensor_C = Sensor C
sensor_D = Sensor D
aux_5V = Internal 5V auxiliary
eth_pwrout = Ethernet auxiliary power output
aux_pwrout = Auxiliary power output
auxb_pwrout = Auxiliary power output B