The 803-PL10LH is a Rotating Cam Limit Switch in the Allen-Bradley Bulletin 803 Style “P” Device series, which is used with machinery that has repetitive operation cycles in operations where the machinery motion correlates with the switch shaft rotation. The device is built for long-lived, heavy-duty operations like the steel forming, packaging/assembling, and the waterway gates/locks, and it uses a shaft-mounted cam, which actuates contact as the shaft rotates for operation. It has 10 circuits, with a cam-opened 25A, NC contact, and 10 or fewer independently-operated cam assemblies, with adaptable lower and higher cam segments. The 803-PL10LH has a rotating shaft with a 400 RPM shaft speed, and a factory-modified left-hand shaft extension, and it has a keyway which connects the machines to the cam limit switch’s rotating shaft.

The 803-PL10LH Rotating Cam Limit Switch has a spring-loaded cam roller, which produces actuation as the higher cam segment brushes against it, and which de-activates the circuit as the lower cam segment passes by it, and the duration of the cam activation (dwell time) depends on the size of the higher cam segment (lobe). The device also has a timing that is set and measured in degrees, which depend on the position of the cam with respect to the keyway position, and it has a timing duration of 11 to 349 degrees. The 803-PL10LH has low-cost, high-speed internal dwell and timing adjustments, which is done when the machine stops, and the machine operations and control depend on both the timing and the dwell time settings. It comes in a NEMA Type 1 enclosure, and it is built for operation at a temperature range of -22 to 150 degrees Fahrenheit, and a storage range of -22 to 200 degrees Fahrenheit. The 803-PL10LH weighs approximately 13.2 kilograms (29 pounds) with less operable cams, and it has total dimensions of 483.3 x 181 x 138.1 millimeters (19.04 x 7.12 x 5.44 inches).