Product Description
The Allen-Bradley 20DD034A3EYNANNNB adjustable frequency AC drive, a Rockwell Automation product, is a 480V three-phase unit accepting up to 34 amps, suitable for demanding industrial applications. Its IP20/NEMA Type 1 enclosure protects it for indoor use, while a numeric LCD, quick start guide, and integrated IGBT braking system simplify operation and setup. Safety features include an adjustable bus undervoltage trip, and temperature is managed by a microprocessor-monitored heat sink thermistor. The drive offers 0.25-second logic control ride-thru and 15-millisecond power ride-thru at full load for enhanced system stability.
Is Your Device Showing These Signs?
The Allen Bradley 20DD034A3EYNANNNB Servo Drive commonly experiences issues related to failed electrolytic capacitors within the power supply, resulting in DC bus undervoltage faults and drive trips. IGBT failures in the inverter section are frequent, causing overcurrent faults and preventing motor operation. Encoder feedback problems, stemming from damaged encoder cables or faulty encoder modules, lead to positioning errors and erratic motor behavior. Communication failures on the EtherNet/IP network due to damaged ports or configuration errors disrupt control signals and data transfer. Firmware corruption necessitates a reflash to restore proper drive functionality and resolve software-related errors.
Technical specifications
The Allen-Bradley 20DD034A3EYNANNNB is a robust 480V, 34-amp AC drive from Rockwell Automation designed for industrial use. It features an IP20/NEMA Type 1 enclosure for indoor protection, a user-friendly LCD interface, integrated braking, and safety features like adjustable undervoltage trip. It also boasts short ride-thru capabilities for both logic control and power, ensuring system stability.
Our Repair Process for the
20DD034A3EYNANNNB
Our repair process for the Allen Bradley 20DD034A3EYNANNNB Servo Drive begins with a comprehensive evaluation to confirm the reported fault and identify any additional issues. We replace all electrolytic capacitors in the power supply to address DC bus undervoltage faults and prevent future failures. The IGBTs in the inverter section are thoroughly tested, and replacements are installed if any signs of degradation or failure are present to resolve overcurrent faults. Encoder cables are inspected and replaced as needed, and encoder modules are tested and repaired or replaced to eliminate positioning errors. EtherNet/IP communication ports are examined for damage, repaired or replaced, and configurations are verified to ensure proper network communication. Finally, the drive firmware is updated or reflashed to the latest version to correct any software-related errors and optimize performance.
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