Electronic lamp ballast device e.g. for building lighting management system, uses heating circuit as voltage supply for external terminal

摘要

A operating appliance for mains-current operated light-source having at least one heated filament (W1,W2) and in particular gas-discharge lamps (LA) having a heating circuit (HzK) for generating a supply voltage (Uh) for the winding (filament) to be heated, in which the heating circuit (HzK) is designed to serve as a voltage supply (AS) for at least one terminal taken outside (DC-OUT) of the operating appliance. Independent claims are included for the following (A) An electronic ballast and (B) A bus system for digital data exchange.