1. General Information

• Manufacturer: ABB (Sweden)

• Model Number: 216NG62A

• Main Board PN: HESG441634R1/K

• Attachment Board PN: HESG216876

• Product Name: Excitation Analog & Digital I/O Interface Board

• Series: AC450 Excitation Control System

• Module Type: Signal Acquisition & Sampling Assembly Board (Obsolete Vintage Module)

• Application: Special signal sampling board for AC450 excitation rack; collects generator stator voltage, field current, grid analog signal and digital interlock status; transmits raw data to 216VC62a CPU for operation calculation; widely matched in old thermal power and hydropower excitation cabinet.

• Installation Rule: Standard slot beside CPU board inside AC450 rack

• Compliance: CE, IEC 61000 EMC Electromagnetic Compatibility

2. Functional Description

• Signal Sampling: High-precision AC voltage & DC current real-time acquisition

• Signal Conversion: Analog to digital signal conversion for CPU calculation

• Digital Interface: External interlock switch & breaker status detection

• Signal Filtering: Built-in anti-jamming filter for high EMI power plant environment

• Data Transmission: High-speed bus data interaction with 216VC62a main CPU

3. Electrical Specifications

• Power Supply: 24 VDC ±10% Industrial DC Power

• Power Consumption: ≤ 4.5 W Ultra-low power consumption

• Analog Input: 0~10V / 4~20mA standard excitation signal

• Sampling Frequency: Max 30kHz high-speed signal collection

• Communication Bus: Dedicated internal AC450 parallel bus

• Isolation Voltage: 1500 VAC reinforced isolation grade

4. Environmental Specifications

• Operating Temperature: -20 °C ~ +70 °C (-4 °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 combination board (Main sampling board + auxiliary attachment board)

• Dimensions (H × W × D): 223 × 200 × 28 mm

• Weight: Approximately 0.42 kg

• Mounting: Rack card slot installation, non hot-swap

6. Compatible Devices

• System Rack: AC450 Excitation System Rack

• Matching CPU: 216VC62a (HESG324442R13/E)

• Matching Power: PMA323BE (HIEE300308R1)

• Application Cabinet: Generator Static Excitation Control Cabinet

7. Key Features

• Dedicated excitation sampling circuit for generator voltage & current signal

• Strong anti-interference performance, suitable for high magnetic field excitation cabinet

• Two-piece laminated board design for stable long-term sampling

• Strict data synchronization with 216VC62a to ensure AVR regulation accuracy

• Obsolete spare parts, exclusive matching accessory for old AC450 rack

8. Core Definition (AC450 Three-Piece Set)

• 216VC62a: Excitation CPU (Calculation & Control Core).

• 216NG62A: I/O Sampling Board (Signal collection & filter).

• PMA323BE: System Power Board (Whole rack power supply).

• Complete Set: These three boards constitute the standard AC450 control unit.