The Allen-Bradley 803-F312RF is a Rotating Cam Limit Switch from the 803 product family. This robust switch is a circuit device made for control and feedback purposes on machinery with cyclic operations. This device performs contact opening and closing at predetermined positions while the module’s shaft rotates. The shaft is coupled with a targeted moving part of the machine controlled, and it can be rotated in clockwise and in a counter-clockwise direction. The 803-F312RF comes in a smooth mechanical design to endure working in harsh conditions for long periods of time.

The 803-F312RF is a “style F” rotating cam limit switch. This device can be adjusted within a cam duration range of 12 to 348 degrees. It has 3 independent cam-roller assemblies which actuate 3 snap action single pole double throw (1 NO / 1 NC) contacts. Its special feature is an external screwdriver adjustment option (timing and dwell time parameters) and the type 1 & 13 industrial enclosure is implemented on this limit switch. This unit’s shaft rotation is greatly reduced over a 150:1 gear ratio reducer and its shaft extension is left oriented (device face view). The 803-F312RF has external dwell and timing adjustments. These adjustments are performed with a screwdriver and can be completed while the device is on a functioning. The Allen-Bradley 803-F312RF outer dimensions excluding its shaft are 179.4 millimeters x 177.8 millimeters x 82.6 millimeters (7.06 inches x 7.00 inches x 3.25 inches). The product’s weight is 5.4 kilograms (12 pounds) and should operate in a temperature range of -30 to 66 degrees Celsius (-22 to 150 degrees Fahrenheit). Note that the production of the 803-F312RF switch was stopped in 2007.