Product Description
The Allen-Bradley PowerFlex 700S drive, model 20DD077A0EYNANAAE, is a 480V three-phase adjustable-frequency AC drive capable of handling 77 amps in normal-duty applications. Featuring an IP20/NEMA Type 1 enclosure, IGBT braking, adjustable undervoltage trip, microprocessor-monitored heat sink, and ride-thru protection (0.25 seconds off, 15 milliseconds on), it provides reliable motor control in demanding indoor industrial environments.
Is Your Device Showing These Signs?
The Allen Bradley 20DD077A0EYNANAAE Servo Drive commonly requires repair due to issues stemming from excessive current draw, IGBT failures, and resolver feedback malfunctions. Over time, electrolytic capacitors degrade, causing DC bus voltage instability and triggering fault codes. Communication errors on the EtherNet/IP network are addressed through firmware updates and port diagnostics. Power supply failures, often caused by component aging and thermal stress, are resolved via component-level repair or power module replacement. Proper thermal management and adherence to specified environmental conditions are crucial for preventing premature failures.
Technical specifications
The Allen-Bradley PowerFlex 700S drive (model 20DD077A0EYNANAAE) is a 480V, 77-amp AC drive for three-phase motors. It's designed for indoor industrial use, featuring an IP20/NEMA Type 1 enclosure, IGBT braking, undervoltage protection, a monitored heat sink, and ride-thru capabilities.
Our Repair Process for the
20DD077A0EYNANAAE
Our repair process for the Allen Bradley 20DD077A0EYNANAAE Servo Drive begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the malfunction, focusing on common failure points such as excessive current draw, IGBT failures, and resolver feedback issues. Electrolytic capacitors are inspected and replaced if degradation is detected, thereby stabilizing the DC bus voltage and preventing fault codes. Communication errors on the EtherNet/IP network are rectified through firmware updates and thorough port diagnostics. Power supply failures are resolved through component-level repairs or complete power module replacement, addressing component aging and thermal stress. To ensure longevity and reliability, thermal management systems are assessed and optimized, and adherence to specified environmental conditions is strictly enforced.
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.

















