Product Description
The Allen-Bradley 20DD077A0NYNANNNN PowerFlex 700S AC drive is a robust and efficient 480V, three-phase motor controller with a 77-amp normal-duty rating, designed for demanding industrial applications. It features an IP20/NEMA Type 1 enclosure, IGBT braking, adjustable undervoltage trip, heat sink thermistor-based thermal protection, and ride-thru capabilities for brief power interruptions, ensuring reliable performance.
Is Your Device Showing These Signs?
The Allen Bradley 20DD077A0NYNANNNN Servo Drive commonly experiences issues related to power stage failures, specifically IGBT or MOSFET malfunctions, leading to overcurrent faults and drive trips. Encoder feedback problems, stemming from damaged encoder cables or faulty encoder modules, cause erratic motor behavior and positioning errors. Communication faults, such as Ethernet/IP or SERCOS III disruptions, arise from network configuration errors or faulty communication modules, hindering PLC integration. Parameter corruption within the drive's memory necessitates reprogramming to restore proper functionality. Excessive heat buildup due to inadequate cooling or a malfunctioning fan causes thermal overloads and premature component degradation.
Technical specifications
The Allen-Bradley 20DD077A0NYNANNNN PowerFlex 700S is a durable and efficient 480V, 77-amp AC drive for industrial use. It offers features like an IP20/NEMA Type 1 enclosure, IGBT braking, adjustable undervoltage trip, heat sink thermal protection, and ride-thru capabilities for reliable operation.
Our Repair Process for the
20DD077A0NYNANNNN
Our repair process for the Allen Bradley 20DD077A0NYNANNNN Servo Drive begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the failure, focusing on common issues such as power stage failures involving IGBTs or MOSFETs, encoder feedback problems due to damaged cables or faulty modules, communication faults affecting Ethernet/IP or SERCOS III, parameter corruption within the drive's memory, and excessive heat buildup. Upon identifying the fault, we proceed with component-level repairs, replacing defective parts with high-quality replacements and ensuring proper heat dissipation. Subsequently, we reprogram the drive with the correct parameters and conduct rigorous testing under simulated operating conditions to verify functionality and performance. Finally, the repaired drive undergoes a thorough quality assurance inspection before being returned, guaranteeing reliable operation and seamless integration.
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.

















