The TROC Cable Opener carries out the opening and closing of the door by means of a traction cable, which is wound on the friction drum of the gearbox and then through the intermediate rollers is attached to the car door.

The TROC mechanism is reversible, therefore, even when the power is off, the door can be opened and closed manually, both inside and outside the car. The drive is equipped with a controller that has adjustment functions, the closing speed and opening width of the door, as well as the special V-max function, which provides the maximum door closing speed. The V-max function is necessary in cases where it is difficult to close the door of a car standing on a lift. For the safety, the drive has an automatic rollback function.