Product Description
The Allen-Bradley PowerFlex 700S 20DD156A3NNNACGNE is a robust 480V, 156A adjustable frequency AC drive designed for demanding industrial applications, featuring an IP20/NEMA Type 1 enclosure for indoor use, a full numeric LCD display, adjustable undervoltage trip protection, a heat sink thermistor with overtemperature trip, and a 0.25-second logic control ride-thru (non-run mode) with 15ms full-load power sustain, but lacks a braking system.
Is Your Device Showing These Signs?
The Allen Bradley 20DD156A3NNNACGNE Servo Drive commonly experiences issues such as IGBT failures, capacitor degradation leading to DC bus instability, and resolver feedback errors causing inaccurate motor control. Communication faults on the EtherNet/IP network are frequent, stemming from firmware corruption or hardware damage to the communication module. Overcurrent faults arise from motor winding shorts or excessive load, necessitating thorough motor and drive diagnostics. Power supply failures are observed, attributable to component aging or voltage fluctuations, requiring power module replacement.
Technical specifications
The Allen-Bradley PowerFlex 700S 20DD156A3NNNACGNE is a heavy-duty 480V, 156A AC drive for industrial use. It has an IP20/NEMA Type 1 enclosure, LCD display, undervoltage protection, heat sink thermistor with overtemperature trip, and a short ride-thru capability, but no braking system.
Our Repair Process for the
20DD156A3NNNACGNE
Our repair process for the Allen Bradley 20DD156A3NNNACGNE Servo Drive begins with a comprehensive diagnostic evaluation to pinpoint the fault. This includes rigorous testing of IGBTs, capacitors, resolver feedback, and communication modules to identify failures, degradation, or errors. Suspected EtherNet/IP communication faults undergo firmware verification and hardware inspection. Overcurrent faults trigger motor winding and load assessments. Power supply failures lead to power module replacement. All replaced components meet or exceed original manufacturer specifications. The drive undergoes extensive testing under load conditions to ensure optimal performance and reliability 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.

















