Multi-turn limiting device and method of limiting the movement of a motor driven element

A multi-turn limiting device for limiting movement of an element driven by a motor, the limiting device comprising:

• a memory configured to store a value corresponding to a limit position of the element;
• a sensor configured to provide a sensor signal corresponding to a position of the element;
• an output for providing a switching signal to the motor, and
• a controller connected to the sensor for receiving the sensor signal and to the memory for retrieving the value and to the output for providing the switching signal,
• wherein the controller is configured to provide the switching signal depending on the sensor signal and the value;
• and
• wherein the multi-turn limiting device further comprises:
• a movable member, the movable member being mechanically couplable to the element via a transmission having a non-unitary first transmission ratio;
• and
• a further sensor configured to provide a further sensor signal corresponding to the position of the movable member, and
• wherein the controller is further connected to the further sensor for receiving the further sensor signal, and wherein the controller is configured to provide the at least one switching signal further depending on the further sensor signal.