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Allen Bradley 803 Rotating Cam Limit Switches 803-F412RH

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803-F412RH

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The 803-F412RH rotating cam limit switch is an Allen-Bradley/Rockwell Automation rotating cam limit switch from the Bulletin 803 series. Its shaft has a right extension and it can rotate clockwise or counterclockwise as needed. The 803-F412RH rotating cam limit switch has 4 independent cam operators that can close its normally open contact and open its normally closed contact. Both of the switch’s contacts are snap action contacts. The 803-F412RH rotating cam limit switch has a Type 1 and 13 enclosure for protection.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 803-F412RH

ManufacturerAllen Bradley
Product TypeRotating Cam Limit Switch
Product Line803 Rotating Cam Limit Switches
Part Number803-F412RH
Weight2.00 lbs (0.91 kg)
Style of DeviceF
Circuits4
ModificationRight Hand Extension
Modification 2N/A
Modification 3N/A
Enclosure Type1 and 13
Amps10
ContactSnap Action 1 N.O.-1 N.C.
Cam Operators2-12 Independent
Max. Shaft Speed150 rpm
Cam Duration12°-348°
Extension StandardLeft Shaft
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The 803-F412RH Rotating Cam Limit Switch is a heavy-duty circuit control device by Allen Bradley that is used in repetitive machine operations where the shaft rotation corresponds to the machine’s motion. The 803-F412RH is specially designed for long-life and heavy-duty operations and it is suitable for assembling, packaging, and steel forming applications. The device has 4 snap action contact blocks (10A N.C., N.O.), a spring-loaded cam roller, a rotating shaft with 150 RPM maximum shaft rotation speed and an over-sized ball bearing, 4 cam assemblies, and a keyway for connecting the shaft to machines. The cam assemblies have 2 adjustable segments (lobe and valley), and the circuit activates when the lobe pushes against the cam-roller and it de-activates when the valley passes through the cam-roller. The 803-F412RH has a dwell time which corresponds to the size of the lobes, and the device can achieve maximum dwell time when the lobes of the cam segments offset at a maximum angle and the minimum dwell time is achieved when both lobes are aligned.

The 803-F412RH comes with a timing angular degree that is determined by the position of the cam on the shaft with reference to TDC and the machine control and operations are determined by the settings of both the dwell time and the timing of each circuit. The 803-F412RH and all Style F devices have external dwell time settings and timing settings that can be adjusted by using a screwdriver while the machine is in motion, and it also has a customized right-hand shaft extension. It has an operating temperature range of -30 to 66 degrees Celsius (-22 to 150 degrees Fahrenheit), with storage limits of -30 to 93 degrees Celsius (-22 to 200 degrees Fahrenheit), and it is enclosed in a water-tight, dust–tight, and oil-tight NEMA Type 13 rated enclosure. The 803-F412RH weighs approximately 5.4 kilograms (12 pounds), with a 446.1 millimeters x 82.6 millimeters x 177.8 millimeters (17.56 inches x 3.25 inches x 7.0 inches) shipping volume, and it is CE, UL, and CSA-certified.

Revision Part #Also known as
803-F412RH Ser A803-F412RH/A, Series A, Rev A
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