The modular design of the 3D system means that current door safeguarding carried out by only alight curtain system can be inexpensively upgraded to a 3D system.

Parted_3D fixed in the empty place between car door and portal crane. For the middle open Portal crane, 3D should be installed in the middle of Car Door. For side opening Portal Crane, 3D should be installed in the installed in the no activity side. When closing the door, no sollision should be made with 3D sensor.