The annunciators are split into three categories - Module, Glareshield and MIP
If the Caution and Warning lights are connected, these will be actioned by any corresponding 'Trigger' settings.
The Annunciator LEDs in the Overhead panel and the MIP panel are powered directly from the controller board which is powered by the 5 Volts from the USB cable. It is recommended that the Lamp Test facility is used only for a couple of seconds, because with all annunciators lit up, the current consumed may be close to the limit of the USB port. Older style USB ports are not able to supply high currents, so it is a good idea to use a Powered USB Hub.
The large additional Caution, Warning, and Fire / Extinguisher pushbutton indicators have 12 Volt lamps in them, so they need a separate power supply to enable them to operate. There is a 2 way screw terminal block on the controller board to allow this 12 volt power supply to be connected.
The supplied software communicates with FSUIPC and allows the user to configure the functions and then, when the main program is run, any switches and/or encoders will directly control actions within Flight Simulator, and any outputs will receive data from Flight Simulator. The inputs and encoders can be Offsets, Macros, event controls or lua parameters, which is important for 'Add-On' aircraft.