It is possible to connect twin pushbuttons of non-interlocked type or of interlocked type without dead man contact, i.e. the pushbutton must not remain pressed. Switches of 1-0-2 type cannot be connected. The window shutters module is provided with an integrated torque control that stops the window shutter stroke if obstacles or frictions are present during its movement. Connection of non-interlocked pushbuttons is permitted because the simultaneous or accidental press of the two pushbuttons results, thanks to the YOKIS module, in the shutter lowering, thus avoiding bringing the phase to the motor up and down wires at the same time.