ABB APOW-01C+NRED-61 Replacement Upgrade for ACS800

Product Overview

ABB APOW-01C+NRED-61 Replacement Upgrade for ACS800: Seamless Transition & System Continuity

The ABB APOW-01C+NRED-61 is a factory-original power supply and control board assembly designed for the ABB ACS800 series variable frequency drives. As industrial facilities face the challenge of aging drive infrastructure, discontinued firmware platforms, and increasingly scarce legacy components, this module represents a proven, drop-in upgrade path that preserves existing wiring topology, cabinet footprint, and communication architecture — eliminating the need for costly full-drive replacements or panel redesigns.

Whether you are managing a planned retrofit, responding to an unscheduled drive fault, or building out a strategic spare parts inventory for critical production lines, the APOW-01C+NRED-61 delivers the electrical compatibility and mechanical fit required for a smooth, low-risk transition from older or failed ACS800 power supply assemblies.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful ACS800 power supply module replacement is rarely a single-component event. In practice, field engineers conducting a drive retrofit or emergency repair will simultaneously inspect and often replace several interdependent components to ensure the upgraded drive returns to full operational reliability.

When installing the APOW-01C+NRED-61, it is standard practice to verify the condition of the ACS800 RMIO-11C main control board, which governs I/O signal routing, speed reference inputs, and relay outputs. A degraded RMIO board can mask the root cause of a drive fault and lead to repeat failures after the power supply is replaced. Similarly, the RDCO-01C or RDCO-04C DDCS communication adapter should be inspected — fiber optic connectors are susceptible to contamination and mechanical fatigue in high-vibration environments, and a faulty RDCO module will prevent the drive from communicating with the master PLC or DCS controller after the swap.

The ACS800 AINT-02C or AINT-14C inverter control board is another component that warrants attention during a power supply retrofit. These boards manage the IGBT gate drive signals and are thermally stressed over the drive’s service life. If the original fault was caused by a DC bus overvoltage or short-circuit event, the inverter board may have sustained secondary damage that will not be apparent until the drive is re-energized.

On the input side, engineers should confirm the integrity of the ACS800 input choke or du/dt filter module, particularly in installations where the drive feeds long motor cable runs or operates in environments with significant harmonic disturbance. Replacing the power supply without addressing upstream power quality issues can shorten the service life of the new module.

For cabinet-level upgrades, the ACS800 fan and cooling assembly — including the internal circulation fans and the thermal sensors — should be replaced as a matter of course when the power supply is swapped. Cooling degradation is one of the leading causes of premature power supply failure in ACS800 drives, and new cooling components are a low-cost insurance policy against repeat downtime.

If the installation involves a multi-drive system or a common DC bus architecture, the ACS800-104 or ACS800-107 inverter unit configuration should be reviewed to confirm that the replacement module’s firmware revision is compatible with the system’s master drive or inverter unit. In multi-drive topologies, firmware mismatches between the power supply control board and the inverter unit can cause synchronization faults that are difficult to diagnose without the original commissioning documentation.

Finally, for sites that are migrating from an older ACS600 or ACS400 platform to the ACS800 architecture, the NPBA-12 PROFIBUS adapter or NEBA-01 EtherNet/IP adapter may be required to bridge the communication protocol gap between the legacy PLC program and the new drive’s fieldbus interface. These adapters mount directly to the ACS800 control board and allow the existing PLC ladder logic to communicate with the upgraded drive without requiring a full program rewrite.

Retrofit Guidance FAQ

Q1: Can the APOW-01C+NRED-61 be installed without modifying the existing cabinet wiring?
Yes. The APOW-01C+NRED-61 uses the same connector pinout and rail mounting geometry as the original ACS800 power supply assembly. No wiring modifications are required. However, it is strongly recommended to perform a full insulation resistance test on the motor cable and verify DC bus capacitor condition before re-energizing the drive after any power supply replacement.

Q2: Do I need to reprogram the drive after replacing the power supply module?
In most cases, drive parameters are stored on the RMIO control board or the optional control panel memory unit, not on the power supply module itself. If the RMIO board is retained and the parameter backup is intact, the drive should restore its previous configuration on first power-up. It is best practice to perform a full parameter backup using ABB DriveWindow or the ACS800 control panel before beginning any module swap.

Q3: Is this module compatible with both standalone ACS800 drives and multi-drive cabinet configurations?
Yes. The APOW-01C+NRED-61 is compatible with standard ACS800 single-drive units as well as ACS800 multi-drive and common DC bus configurations. For multi-drive installations, confirm the firmware revision of the NRED-61 control board against the system’s inverter unit firmware to ensure compatibility before commissioning.

Q4: What pre-shipment testing is performed, and what does the 12-month warranty cover?
Every APOW-01C+NRED-61 unit undergoes functional power-on verification and visual inspection prior to shipment. The 12-month warranty covers manufacturing defects and functional failures under normal operating conditions from the date of shipment. Warranty support includes technical diagnosis assistance, replacement dispatch, and after-sales response within one business day. Units damaged by incorrect installation, overvoltage events, or environmental contamination beyond rated specifications are not covered under the standard warranty.