Allen‑Bradley 314066‑A02 40026148274002577426 Drive Internal Power Supply Board

The Allen‑Bradley 314066‑A02 (serial No.40026148274002577426) is an internal switch‑mode power supply board for Rockwell 700‑series AC variable‑frequency drives. It converts main‑circuit high‑voltage input into multiple groups of stable DC auxiliary power rails, supplying power for drive control logic, signal circuits and peripheral interface hardware inside the frequency converter unit.

This plug‑in PCB assembly integrates high‑frequency transformer, filter capacitors and over‑current/over‑voltage protection circuits. It is a critical aftermarket spare part for maintenance, overhaul and retrofitting of legacy 700 series drive equipment in manufacturing and process‑industry sites.

Main Specifications

• Brand: Allen‑Bradley (Rockwell Automation); Model:314066‑A02; Serial ID:40026148274002577426; Type: Drive Internal Power Supply Board
• Applicable Device: Rockwell 700‑series AC variable‑frequency drives
• Input: High‑voltage DC bus from drive main power section; Output: Multi‑channel regulated DC auxiliary power rails
• Interface: Internal board‑to‑board connectors for drive mainboard, filter capacitor bank, high‑frequency power transformer
• Function: Auxiliary power conversion, multi‑rail DC output, built‑in over‑voltage, over‑current and short‑circuit protection
• Feature: Plug‑in internal installation, industrial anti‑interference design, compact PCB power‑supply architecture
• Installation: Internal plug‑in assembly inside 700‑series frequency‑converter cabinet
• Operating Environment:0℃ ~ +60℃, 5%‑95% RH non‑condensing
• Certifications: CE compliant for industrial variable‑frequency‑drive automation applications

Core Functions

• Take high‑voltage DC bus signal from drive main circuit and convert it into multiple stable low‑voltage DC auxiliary power supplies via high‑frequency switching conversion.
• Provide reliable power supply for drive CPU logic board, signal conditioning circuit and communication interface peripheral components.
• Integrate hardware protection mechanism for over‑voltage, over‑current and short‑circuit faults to avoid secondary damage to other internal drive boards.
• Deliver continuous and stable auxiliary power when drive is running, supporting normal startup and fault diagnosis of the whole frequency‑converter unit.
• Adopt plug‑in structural design, convenient for on‑site replacement during drive maintenance without complex wiring modification.
• Cooperate with main control board to feed power‑supply‑abnormal fault signals for drive system self‑diagnosis and alarm processing.

Application Scenarios

• Internal auxiliary power component for legacy Rockwell 700‑series AC variable‑frequency‑drive motor‑control systems.
• Power‑supply‑board spare part for conveyor, pump and fan drive‑control equipment in manufacturing workshops and process‑industry sites.
• Retrofit and spare replacement for legacy 314066‑A02 power‑board drive‑hardware upgrade projects.
• Frequency‑converter overhaul, auxiliary‑power‑loop debugging and faulty internal power‑supply‑board replacement tasks.
• Spare‑parts inventory for drive‑system integrators and industrial automation engineering contractors.

• Global aftermarket spare supply for technical teams maintaining Allen‑Bradley 700‑series legacy variable‑frequency‑drive hardware.