Product Description
The Allen Bradley 803-P4LHX is a robust rotating cam switch designed for demanding industrial applications involving cyclic or rotational movements, particularly where machine motion is linked to shaft rotations. Part of the "P" style 803 series, it offers versatile customization with accessories, mounting options, and handles. It operates up to 400 rpm, with adjustable cam durations between 11 and 349 degrees. Housed in a Type 1 enclosure, the 803-P4LHX features 2 to 12 independent cam operators and a 25 Amp N.C double break contact. Available with or without cams, the "P" style includes internal timing and dwell adjustments that must be made while the device is stationary, requiring cover removal and cam bolt manipulation. Its standard right-side shaft extension and angular degree scales on the cam mounting plate simplify setup.
Is Your Device Showing These Signs?
The Allen Bradley 803-P4LHX suffers from common failures including contact degradation leading to operational intermittence, coil burnout causing complete relay failure, and mechanical wear affecting plunger movement and overall responsiveness. Technicians address these issues through contact cleaning or replacement, coil rewinding or module substitution, and mechanical adjustments or component replacements to restore proper functionality. Environmental factors such as excessive vibration or high ambient temperatures exacerbate these problems, demanding careful consideration during troubleshooting and repair. Proper maintenance and timely intervention are crucial to prevent downtime and ensure optimal performance of the 803-P4LHX.
Technical specifications
The Allen Bradley 803-P4LHX is a heavy-duty rotating cam switch for industrial applications involving cyclic or rotational movements. It's highly customizable with various accessories and offers adjustable cam durations. Key features include operation up to 400 rpm, a Type 1 enclosure, 2-12 independent cam operators, and a 25 Amp N.C double break contact. Adjustments to timing and dwell require the device to be stationary and involve cover removal. It has a standard right-side shaft extension and angular degree scales for easy setup.
Our Repair Process for the
803-P4LHX
Our repair process for the Allen Bradley 803-P4LHX begins with a thorough assessment to diagnose contact degradation, coil burnout, or mechanical wear. Technicians meticulously clean or replace degraded contacts, rewind coils or substitute the module, and perform mechanical adjustments or component replacements to rectify plunger movement issues. Environmental factors, including excessive vibration and high ambient temperatures, are carefully evaluated during troubleshooting. This process guarantees the restoration of optimal functionality and prevents future downtime through precise maintenance and intervention.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.
Ships from Rochester, NY