DI-103, Link switch, is attached to top and bottom of elevator and reduces the speed or cuts the power for preventing elevator to go beyond limited operation distance and also can be used for stage setting or general machine and etc.

Three link switches are installed to each the top and the bottom and the installation location is can be different according to the speed of elevator.

Normally, it is contracted with NC("B" contract point) and when roller passes through cam, it operates.