A drum type limit switch is a multi-contact output type limit switch.
It is widely used for positioning control in many industrial production lines such as cranes, unloaders, stackers, reclaimers, mobile trippers, and revolving chutes.
It mainly consists of an input shaft, speed reducer, cam, and microswitch, and takes in the number of rotations from equipment and converts it into multiple position information and outputs it as a contact signal.