The 803-F812RH is a Rotating Cam Limit Switch from the 803 series, manufactured by Allen-Bradley. In terms of accuracy and repeatability, this condition sensing control circuit device is highly rated in the heavy-duty application industry. It is used with mechanisms that require a repetitive cycle of operation, such as punch presses, bottling machines, and heavy metal steel forming machines. The 803-F812RH rotating cam limit switch performs cam assembly contact actuation at user-defined angular positions of controlled mechanisms. These feedback signals are then further processed for the logic control of the target machine. This flexible mounted product operates in the same way, by rotating in either direction. Its design allows installation in any plane.

The Allen-Bradley 803-F812RH heavy duty industrial switch has eight separate switching circuits (eight separate cam-roller assemblies for actuating 10A 1NO / 1NC contacts. The device has Type a 1 & 13 enclosure with screws for the external adjustment of timing and dwell parameters. For the purpose of timing and dwell adjustments, the user is not required to remove the unit’s cover, as the mechanical settings are made externally. The only necessary tool is a screwdriver, and the machinery can continue running as adjustments are made. The targeted machine is connected to the right side of the device (its shaft extension comes to the right). The product’s dimensions are 12.31 x 7.00 x 3.25 inches (312.7 x 177.8 x 82.6 millimeters) and its shipping weight is approximately 14 pounds (6.4 kilograms). The operating temperature range of this unit is -22 to 150 degrees Fahrenheit (-30 to 66 degrees Celsius) and it was discontinued in 2007.