Control by means of analog signal 1-10V or 0-10V was created with the idea of extending the conventional lighting installation with the possibility of automatic control of the luminous flux value of discharge sources, ultimately fluorescent lamps used indoors. The control of luminaire parameters is carried out by means of control line wires, by changing the interference-free voltage signal at the terminals of the ballast in the range of 1-10V. Changing the voltage triggers a change in the operating frequency of a given circuit. This results in a change in the value of the impedance of the coil (L- in the illustration) and capacitor (C) located in the electronic ballast, in effect causing a change in the current flowing through the luminaire, and thus the value of the luminous flux.
Using the 1-10V control, we can distinguish two extreme values of voltage, and thus the luminaire's luminous flux states, between which we can make adjustments:
- the voltage of the control line is 1V (the control wire is in the short-circuit state), for this state the luminous flux of the lamp is 1% of the maximum value (for linear fluorescent lamps) and 3% for compact fluorescent lamps
- the voltage of the control line is 10V (the control wire in the disconnected state), the value of the luminous flux is 100% of the maximum value (control cable in disconnected state), the luminous flux is 100% of the maximum value