How does an remote controlled operating mechanism work?

This kind of operating mechanism unlocks the blade of the damper either remotely by a current impulse or a current interruption to a magnet, or automatically by the melting down of a thermic fusible link when a temperature of 72°C is reached in the duct. When triggered, the mechanism closes the blade.

With an end or begin or range switch the position of the blade can be verified.

The re-arming of the damper is done manually or through the (optional) resetting motor.