Balluff, germany manufactures the zone limit switch for all-round safety, marketed by balluff india. Securing the operating work envelope of a robot requires physical barriers [eg, an interlocked fence] as well as a system, which safely limits the zone of movement. In many cases, safety circuits are must that are essentially independent of the controller and software. The work envelope is the permissible extension zone of the robot. The safety zone is the area where the robot is not allowed to enter under any circumstances. A circular collar is attached to the robot axis that needs to be secured. Round cams, attached to the collar, determine the operating work envelope and safety zone of the robot. The cams actuate safety switch elements that can be 2- or more channels, depending on the requirements of the safety circuit. Balluff multiple position limit switches with right plunger and safety switch inserts per vde 0 113 are ideal components to construct safety apparatus for man and machine.
