The 803-A24R Rotating Cam Limit Switch from Allen-Bradley is a Style A heavy-duty control circuit device with 2-circuit control that is used with automated industrial machinery with the dedicated operation. The device is used in operations where the machine’s motion directly corresponds to shaft rotation, and when used with machinery, it initiates actuation contacts, at various point of the shaft rotation. It is suitable for applications like steel forming/heavy metals forming, punch presses, and assembly and packaging processes. The 803-A24R comes with a 25A N.C. (Normally-Closed) double break contact with 150A and 15A MAKE/BREAK Amperages at 120 Volts AC and 30A and 3A amperages at 600 Volts AC, with a continuous carrying current of 25A. The device contact has an 1800 Volt AC-rated MAKE and BREAK real power at 50 to 60 Hertz, with a DC voltage range of 230 to 250 Volts DC, and it supports a maximum shaft speed of 150 RPM.

The 803-A24R has integral function parts like the Lobe, the Valley segment, the Keyway slot, and it has a circuit activating timing, which is measured by the set position of the cam on the shaft. The device also has a selectable dwell time between the minimum dwell time and the maximum dwell time, determined by the size of the lobe and position of the cam segment. The 803-A24R like every Style A device in the 803 Series, has a modified left-hand shaft extension, and it has an angular degree cam duration scale with 14 degrees minimum and 346 degrees maximum range. Its operating temperature range is -30 to 66 degrees Celsius (-22 to 150 degrees Fahrenheit), at a relative humidity range of 5 to 95% without condensation, and its storage temperature range is -30 to 93 C (-22 to 200 degrees Fahrenheit). The device weighs approximately 20 kilograms (9.1 pounds), and it fits in a NEMA Type 1 enclosure with 111.1 x 144.5 x 200 millimeters (4.38 x 5.69 x 7.88 inches) net dimensions.