The Allen-Bradley 803-F612RH Rotating Cam Limit Switch is a circuit control switch with a right-hand shaft extension. It works with heavy-duty machinery that has repetitive operation cycles, in operations where the machine’s motion is determined by shaft rotation. The 803-F612RH is made for a long operation lifespan, and it operates with a shaft-mounted cam, which actuates contacts when the shaft rotates. The device has 6 independently-operated cam assemblies with adjustable cam segments, and its rotating shaft has a 150 RPM shaft speed, and a keyway for connecting the rotating shaft to machines. The device has 6 cam operators with adjustable cam segments which operate independently, and it has a cam roller assembly that is mounted on a contact base. The 803-F612RH’s rotating shaft has a 150 RPM shaft speed, and it has 6 operating control circuits with 10A snap-action (1 NC, 1 NO) contact, which is activated when the cam lobes (higher cam segment) pushes against the cam roller assembly.

The duration of the 803-F612RH’s cam activation (dwell time), which depends on the size of the switch’s cam lobes, is at its minimum when the cam lobes align, and at its maximum when the cam lobes offset. The device’s cam timing determines when the rotating cam will activate the circuits, and the cam timing depends on the position of the cam, relative to the position of the Top Dead Center/keyway, and it has cam duration limits of 12 to 348 degrees. The 803-F612RH has adjustable external dwell and timing settings, that can be changed with a screwdriver while the machine is in motion and it has a factory-modified right-hand shaft extension. It has an operational temperature range of -30 to 66 degrees Celsius (-22 to 150 degrees Fahrenheit), with a storage range of -30 to 93 degrees Celsius (-22 to 200 degrees Fahrenheit), and it comes in a NEMA Type 13 oil-tight and watertight industrial enclosure. The 803-F612RH weighs about 9.1 kilograms on average, with aggregate dimensions of 466.1  x 388.1 x 194.5 millimeters, and it is CE, CSA, and UL-certified.