The elevator door drive is comprised of a controller and the maintenance-free drive unit, geared motor or gearless EC technology direct drive motor.

Controllers are electronic controllers connected to the power supply either via an internal power supply unit (SIDOOR AT12) or via an external power supply unit (SIDOOR NT40 or SIDOOR Transformer). They are generally connected to the higher-level controller via digital or fieldbus interfaces, and can be configured via a user interface.

The SIDOOR AT12, SIDOOR AT40 and SIDOOR ATE500E controllers can be used to operate horizontally operated cabin and shaft doors at adjustable speeds and accelerations.

The SIDOOR ATD400V controller for rising doors and rolling shutters enables the operation of vertical door systems on elevators at adjustable speeds and accelerations.

Geared motors form the maintenance-free drive unit in the door drive. The geared motors feature DC motors with non-self-locking gearing, and are speed-controlled. The set force and speed limits are not exceeded. The gearless motor (direct drive) is the maintenance-free drive unit of the door drive.

Operation of the named door drives does not require limit switches. The door width and the "OPEN"/"CLOSE" positions are determined automatically.

The power is transmitted by a toothed belt. The toothed belt passes over a deflector pulley and can be fitted with 2 door clutch holders. This enables it to drive both one-sided and centrally-opening doors. The accessories are not included in the scope of supply, see "Additional units".