Product Description
The Allen-Bradley/Rockwell Automation 20BD077A3NNNAEC1 AC drive, a member of the popular PowerFlex 700 series, is a powerful and versatile solution for users needing feature-rich drives. This specific model operates on 480V AC, requiring a 3-phase power source to control induction motors. It features a Frame 4 size, IP20 NEMA/UL Type 1 enclosure, 77 Amps, and a 60 Horsepower output. Included are a CE filter/CM choke, EtherNet/IP communication slot, vector control with 24V DC I/O, and 12V/5V encoder feedback. It lacks a manual and brake/resistor options. A built-in operator interface with LCD and keypad facilitates easy adjustments. Dimensions are 220mm x 758.8mm x 201.7mm, and it weighs approximately 24.49 kg. The PowerFlex 700 series' standardized design allows users to easily switch between drives to meet evolving system needs.
Is Your Device Showing These Signs?
The Allen Bradley 20BD077A3NNNAEC1 PowerFlex 755 AC drive commonly experiences issues such as IGBT failures, capacitor bank degradation leading to DC bus undervoltage faults, and encoder feedback problems causing erratic motor control. Communication faults on the EtherNet/IP network, often due to corrupted firmware or misconfigured IP addresses, are also frequent. Overcurrent trips, resulting from excessive load or shorted motor windings, require immediate attention. Resolving these issues involves replacing faulty components, updating firmware, and verifying proper motor and network configurations.
Technical specifications
The Allen-Bradley/Rockwell Automation 20BD077A3NNNAEC1 is a feature-rich PowerFlex 700 series AC drive designed for 480V 3-phase induction motor control. It's a Frame 4, IP20 enclosure rated drive with 77 Amps, 60 HP output, CE filter/CM choke, EtherNet/IP, vector control with 24V DC I/O, and encoder feedback. It lacks a manual and brake/resistor options, but includes a built-in operator interface. Its dimensions are 220mm x 758.8mm x 201.7mm, weighs 24.49 kg, and benefits from the PowerFlex 700 series' modular design for easy system integration and scalability.
Our Repair Process for the
20BD077A3NNNAEC1
Our repair process for the Allen Bradley 20BD077A3NNNAEC1 PowerFlex 755 AC drive begins with a comprehensive diagnostic evaluation to pinpoint the failure. This evaluation includes a thorough inspection of IGBTs, capacitor banks, encoder feedback systems, and communication network interfaces. Upon identifying the faulty component, we proceed with its replacement using only verified, high-quality parts. Firmware is updated to the latest revision to address potential software-related issues. Post-repair, we conduct rigorous testing under simulated load conditions to ensure the drive operates within specified parameters. Motor and network configurations are verified for accuracy to prevent recurrence of the original fault. The repaired drive undergoes a final quality assurance check before it is returned.
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