1. General Information

• Manufacturer: ABB (Sweden)

• Model Number: 216VC62a

• Main Board PN: HESG324442R13/E

• Base Board PN: HESG324442R112/F

• Product Name: Main Processor Unit Board

• Series: AC450 Excitation Control System

• Module Type: High-end Excitation Dedicated CPU Assembly (Obsolete Vintage Module)

• Application: Core master processor for large generator excitation system; executes excitation regulation, voltage closed-loop control, field current calculation and fault diagnosis; widely used in old thermal power plant and hydropower station ABB static excitation cabinet.

• Installation Rule: Dedicated CPU slot inside AC450 excitation rack

• Compliance: CE, IEC 61000 Electromagnetic Compatibility Standard

2. Functional Description

• Processor Core: 32-bit High-speed DSP Digital Signal Processor

• Control Algorithm: Automatic Voltage Regulation (AVR), Excitation Limiter, PSS Power System Stabilizer

• Logic Processing: Excitation interlock, over-excitation & under-excitation protection

• Data Storage: ECC high-speed memory for real-time calculation cache

• Diagnosis Function: Self-diagnosis for excitation loop and internal circuit fault

3. Electrical Specifications

• Power Supply: 24 VDC ±15% Industrial DC Power

• Power Consumption: ≤ 5.0 W Low power consumption

• Onboard Memory: 8 MB ECC Dynamic RAM

• External Storage: PCMCIA Flash Card Expansion Slot

• Communication Interface: Onboard dedicated excitation bus interface

• Isolation Voltage: 1500 VAC reinforced isolation grade

4. Environmental Specifications

• Operating Temperature: 0 °C ~ +70 °C (32 °F ~ +158 °F)

• Storage Temperature: -40 °C ~ +85 °C (-40 °F ~ +185 °F)

• Relative Humidity: 5% ~ 95% (Non-condensing)

• Anti-vibration: Compliant with IEC 60068 industrial vibration standard

5. Mechanical Specifications

• Structure: Two-piece assembly (Main CPU Board + Solder Base Board)

• Dimensions (H × W × D): 223 × 200 × 30 mm

• Weight: Approximately 0.48 kg

• Mounting: Dedicated rack slot installation, non hot-swap

6. Compatible Devices

• System Rack: AC450 Excitation System Rack

• Matched Power Module: PMA323BE (HIEE300308R1)

• Application Cabinet: Large Generator Static Excitation Cabinet

• Upper Software: ABB Excitation Monitoring & Debugging Tool

7. Key Features

• Professional DSP chip for high-precision excitation closed-loop regulation

• ECC memory design prevents data error in strong electromagnetic field

• Two-piece board structure, stable connection for long-term operation

• Perfect matching with PMA323BE to form complete AC450 control unit

• Rare obsolete spare parts, exclusive for old power plant excitation renovation

8. Core Definition (Most Important)

• 216VC62a: AC450 Excitation CPU, Generator voltage regulation core board.

• HESG324442R13/E: Upper main CPU processing board.

• HESG324442R112/F: Lower fixed base backplane.

• Set Matching: Must use together with PMA323BE excitation power supply.