Control element for ECOWATT fans with DC brushless motor. It allows control via signal from an analogue output 0-10V depending of the status of three digital inputs free of power. Before each change of digital signal, it can be attributed a voltage output value between 0 and 10V.

Mode of operation:
1. Remote ON/OFF with two speed switch.
2. Up to three switch speeds taking as output the most unfavorable value.