Controllers are electronic units for process control. A lighting control system such as the Light System DALI saves light scenes and controls the luminaires. The amount of data which can be used to store the settings is limited by the storage capacity of the controller. The user operates the controller via software or a control panel. A control line establishes a connection to the luminaires and transmits the signals to the control gear.
In a LON system, D/A modules are used to save and recall light scenes. As output devices, they allow the connection of external dimmers or direct control of dimmable ECGs or transformers.