Allen-Bradley 320087-A06 Maintenance-Ready Spare for PowerFlex Automation
The Allen-Bradley 320087-A06 is an original drive control board engineered for PowerFlex series variable frequency drives (VFDs), widely deployed across manufacturing, process control, and material handling automation systems. When a PowerFlex drive trips offline due to a failed control board, every minute of unplanned downtime translates directly into production loss. Stocking the 320087-A06 as a verified maintenance spare is the most reliable strategy to restore drive operation within a single shift window.
This board governs the core logic, gate-drive signals, and feedback processing within compatible PowerFlex drives. Its failure typically manifests as fault codes related to gate driver errors, control power loss, or communication faults on the drive’s HIM (Human Interface Module) or connected PLC. Maintenance engineers familiar with Allen-Bradley PowerFlex 70, PowerFlex 700, and related series will recognize the 320087-A06 as a critical line-replaceable unit (LRU) that can be swapped without specialized tooling, provided the replacement unit is sourced from a verified original supply chain.
Each unit shipped from our inventory undergoes pre-dispatch functional verification, is individually packaged with ESD protection, and is covered by a 12-month warranty against manufacturing defects. Long-term supply continuity is maintained to support both emergency replacement and planned maintenance programs.
Spare Maintenance Table
| Part Number / SKU | 320087-A06 |
| Brand | Allen-Bradley (Rockwell Automation) |
| Series Compatibility | PowerFlex 70 / PowerFlex 700 series VFDs |
| Component Type | Drive Control Board (Main Control PCB) |
| Supply Voltage | 24 VDC control power (internal regulation) |
| Communication Interface | DPI (Drive Peripheral Interface) compatible |
| I/O Support | Analog and digital I/O signal processing |
| Operating Temperature | 0°C to +50°C (ambient, drive enclosure) |
| Installation Type | Direct board replacement, LRU swap |
| Origin | USA (Original Allen-Bradley manufacture) |
| Condition | Original, new or tested-serviceable |
| Pre-Dispatch Testing | Functional verification performed |
| ESD Protection | Anti-static packaging, individual unit |
| Warranty | 12 Months from date of shipment |
| Lead Time | In-stock, ships within 1–3 business days |
| Application Environment | Industrial automation, process control, HVAC, material handling |
Maintenance Planning for Continuous Operation
A drive control board replacement does not occur in isolation. When a PowerFlex drive is taken offline for a 320087-A06 swap, a disciplined maintenance engineer will use the opportunity to inspect and verify the condition of all associated components in the same electrical cabinet and drive circuit. Neglecting adjacent components is a leading cause of repeat failures after a board replacement.
Begin with the 24 VDC control power supply feeding the drive’s control section — a marginal or noisy supply is a common root cause of control board degradation. Inspect the input line reactor and EMC filter upstream of the drive for signs of overheating or insulation breakdown. Check the DC bus capacitor bank within the drive chassis; capacitor aging is frequently concurrent with control board faults in drives that have been in service for more than five years.
On the I/O side, verify the integrity of all analog input signal cables (4–20 mA or 0–10 V speed reference signals) and digital input wiring for run/stop, fault reset, and speed preset commands. Loose or corroded terminal connections at the terminal block assembly are a frequent source of intermittent faults that are misdiagnosed as control board failures. If the drive communicates over DeviceNet, EtherNet/IP, or ControlNet, inspect the communication adapter module (such as a 20-COMM-E or 20-COMM-D) for firmware currency and connector integrity.
For drives integrated into a Rockwell Automation control architecture, also verify the CompactLogix or ControlLogix PLC I/O module that interfaces with the drive’s run permissive and fault feedback signals. A failed digital output module on the PLC side can simulate a drive fault condition. If a PowerFlex HIM (Human Interface Module) is installed, confirm it powers up correctly after the board swap and that parameter sets are restored from a saved configuration file. Finally, inspect the drive’s cooling fan assembly and thermal sensors — overtemperature conditions are a secondary cause of control board damage and must be resolved before returning the drive to service.
Site Replacement Workflow
Replacing the 320087-A06 in the field follows a structured sequence designed to minimize downtime and eliminate the risk of repeat failure. Before beginning, isolate the drive from mains power and verify zero voltage on the DC bus using a calibrated meter — PowerFlex drives retain dangerous DC bus voltage for several minutes after power removal.
Document the existing drive parameter set using a PowerFlex HIM or DriveExecutive/Studio 5000 software before removing the control board. This ensures that all application-specific parameters — acceleration/deceleration ramps, current limits, speed references, and I/O assignments — can be restored to the replacement board without re-commissioning from scratch. Photograph all wiring connections at the control terminal block before disconnection.
Remove the original 320087-A06 by releasing the board retention clips and disconnecting the ribbon cable and power connectors. Install the replacement board, reconnect all cables in reverse order, and verify seating of the DPI communication connector if a remote HIM or communication adapter is installed. Restore power, clear any stored fault history, and reload the saved parameter file. Perform a no-load test run before reconnecting the mechanical load, confirming that all I/O signals, speed references, and fault relay outputs respond correctly. This workflow is compatible with both direct replacement of failed boards and planned preventive replacement as part of a scheduled overhaul cycle, supporting old-system life extension without requiring drive chassis replacement.
Spare Parts Support FAQ
Q1: Is the 320087-A06 compatible with all PowerFlex 70 and PowerFlex 700 drive ratings?
The 320087-A06 control board is designed for specific frame sizes and firmware revisions within the PowerFlex 70 and PowerFlex 700 families. Compatibility should be confirmed against the drive’s nameplate catalog number and existing board revision marking before ordering. Our technical team can assist with cross-referencing if you provide the full drive catalog number.
Q2: What is included in the 12-month warranty coverage?
The 12-month warranty covers manufacturing defects and functional failures under normal operating conditions from the date of shipment. It does not cover damage resulting from incorrect installation, overvoltage events, or operation outside specified environmental limits. Warranty claims are processed with return authorization and include replacement or repair at our discretion.
Q3: How is the board tested before shipment?
Each 320087-A06 unit undergoes pre-dispatch functional verification to confirm power-up integrity, communication interface response, and absence of visible physical defects. Units are then individually packaged in ESD-safe anti-static bags with protective foam inserts to prevent transit damage.
Q4: Can this board be used as a long-term inventory spare for aging PowerFlex systems?
Yes. The 320087-A06 is specifically recommended as a long-term maintenance spare for facilities operating legacy PowerFlex drives where the original equipment manufacturer has discontinued active production of this board. Holding one or two units in a climate-controlled spare parts store significantly reduces the risk of extended downtime caused by sourcing delays. We maintain ongoing stock to support both emergency and planned procurement programs.
© 2026 SMARTNEXMSK. All rights reserved.
Original Source: https://smartnexmsk.com
Contact: [email protected] | +86 18259474341
