One type of Rotating Cam Limit Switches from Allen Bradley’s product line of rotating switches is the 803-B4RH. This module provides users with various functions and options not found on other switches; it is designed to have a minimum footprint area without compromising efficiency, making the system less bulky, but keeping it equally as powerful. The 803-B4RH switch comes with a right shaft extension instead of the left shaft extension that is standard in the Bulletin 803 Rotating Cam Limit Switches series. Switches from this Allen-Bradley Bulletin 803 product line can work well rotating either clockwise or counterclockwise. The 803-B4RH can be mounted on any surface; this module’s cams themselves are mounted on the shaft. As the shaft turns, the cams activate the contacts. The 803-B4RH has high-performance snap action contacts, which Allen Bradley guarantees as having a long lifespan and increased reliability. This limit switch also has internal dwell and timing adjustments, both of which allow the use of the switch for various applications, such as sequencing, cycling, and control of machine operations. The user can set the on and off points of each of this module’s circuits independently.

Installation and replacement of the 803-B4RH are easy. One can install or replace this switch without disturbing the other parts of the system, meaning that there is a lengthy downtime for the maintenance of the rotating cam limit switch. The dimensions of the general-purpose enclosure of the 803-B4RH are 7.88 inches in length and 5.69 inches in height; its estimated shipping weight is 24 pounds and it has heavy-duty cam segments, a steel base, and cast iron side places. This module also features a 3/4 inch diameter shaft with oversized ball bearings for smooth rotations. This module’s enclosure protects the cams from the harsh working environment.