Closing speed control in power off

A swing door operator for moving at least one door leaf between a first and a second position, the swing door operator comprising:

• a motor and a mechanical drive unit adapted to be connected to and move the at least one door leaf from the first to the second position;
• and
• a braking circuit connected to the motor;
• wherein the braking circuit comprises a diode circuit arranged to apply a voltage drop to the motor, the diode circuit having a plurality of short circuit positions connected to a series of diodes and an electrical bridge detachably connectable via a plug and socket connection to a selected pair of the plurality of short circuit positions so as to short circuit the selected pair of the short circuit positions to alter the voltage drop applied by the diode circuit;
• wherein the motor is adapted to act as a generator and configured to:
• generate a voltage when the drive unit moves the at least one door leaf;
• and
• brake a movement of the at least one door leaf when the voltage generated by the motor is larger than the voltage drop applied by the diode circuit;
• wherein the diode circuit comprises at least three diodes connected in series;
• and
• wherein at least one of the diodes is connected between a pair of the short circuit positions,
• wherein the short circuit positions are configured as sockets and the electrical bridge comprises two plugs configured to form the plug and socket connection between the electrical bridge and two short circuit positions.