The separate direction switch is mounted on the left side of the drive/brake switch unit. It contains a shift lever for changing the direction of travel or the driving mode. In addition, it contains a key switch to start the entire switching unit. All binary signals (switches) are wired to a connector located at the end of a breakout cable.
A mechanical interlocking system has been installed in the shift unit between the direction switch handle, the key switch and the drive/brake switch. The purpose of this locking mechanism is to prevent misoperation of these components. Whether one of the components is locked or not depends on the position of the other components.
A flexible connecting element (so-called flexible bellows) is used to guarantee the mechanical locking between the separate drive/brake switch and the direction switch.