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Product Description
The Allen-Bradley 20DD385N0ENNBNNNN AC drive, designed for robust performance in demanding three-phase, 480V industrial applications, delivers up to 385 amps of normal-duty current. Its open, IP00-rated enclosure with conformal coating protects internal components, while features like adjustable bus undervoltage trip, microprocessor-monitored heat sink thermistor for over-temp protection, and brief power ride-thru capabilities (0.25 seconds logic control, 15 milliseconds full load) ensure reliable continuous operation, despite lacking a human-machine interface and brake functionality.
Is Your Device Showing These Signs?
The Allen Bradley 20DD385N0ENNBNNNN Servo Drive commonly experiences issues such as IGBT failures, capacitor degradation leading to DC bus undervoltage faults, and resolver feedback problems causing erratic motor behavior. Communication errors on the EtherNet/IP network and power supply failures are also frequent. Overcurrent faults, often due to motor winding shorts or excessive load, require immediate attention. Firmware corruption necessitates a reflash, and proper thermal management is crucial to prevent overheating and premature component failure.
Technical specifications
The Allen-Bradley 20DD385N0ENNBNNNN AC drive is a heavy-duty, 480V three-phase drive delivering 385 amps. It features an open, conformal-coated IP00 enclosure, undervoltage trip adjustment, heat sink over-temp protection, and brief power ride-thru. It lacks a human-machine interface and brake functionality.
Our Repair Process for the
20DD385N0ENNBNNNN
Our repair process for the Allen Bradley 20DD385N0ENNBNNNN Servo Drive begins with a comprehensive diagnostic evaluation to pinpoint the failure. This includes a thorough inspection of IGBTs, capacitors, resolver feedback systems, and power supply components. Communication integrity on the EtherNet/IP network is verified, and the drive is assessed for overcurrent faults stemming from motor or load issues. Firmware integrity is checked, and a reflash is performed if corruption is detected. Defective components are replaced with high-quality equivalents, and the drive undergoes rigorous testing under load conditions to ensure optimal performance and reliability. Thermal management systems are scrutinized to prevent future overheating, and all repairs adhere to strict quality control standards.
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