1. General Information

• Manufacturer: ABB (Switzerland)

• Model Number: PMA323BE

• Part Number: HIEE300308R1

• Product Name: Controller Power Supply Module

• Series: Advant Controller 250 (AC250) Excitation System

• Module Type: Industrial Grade Dedicated Power Unit (Old Generation)

• Application: Exclusive power supply for generator excitation control system; provides stable DC power for controller, logic board and signal acquisition unit; widely applied in traditional thermal power plant, hydropower station excitation cabinet; belongs to obsolete spare parts with low inventory.

• Installation Rule: Fixed slot in AC250 standard excitation rack

• Compliance: CE, IEC Industrial Power Certification

2. Functional Description

• Power Conversion: AC to DC isolated switching power conversion

• Voltage Regulation: Real-time voltage stabilization against grid fluctuation

• System Power Supply: Supplies power for internal excitation logic & signal circuit

• Protection Mechanism: Overvoltage, Undervoltage, Short-circuit multi-protection

• Operation Status: Built-in power OK indicator for running diagnosis

3. Electrical Specifications

• Input Voltage: 85 ~ 264 VAC Universal Wide Voltage

• Input Frequency: 45 Hz ~ 65 Hz

• Output Voltage: Standard 24VDC & 5VDC dual channel output

• Power Consumption: ≤ 35 W Max Load Power

• Conversion Efficiency: ≥ 85% Industrial high efficiency

• Isolation Voltage: 2000 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: Metal shielding shell, anti-interference industrial power module

• Dimensions (H × W × D): 250 × 115 × 130 mm

• Weight: Approximately 1.25 kg

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

6. Compatible Devices

• System Rack: AC250 Excitation System Rack

• Matched Module: AC250 series CPU & signal acquisition board

• Application Cabinet: Generator Excitation Control Cabinet

• Upper System: ABB Excitation Control Software

7. Key Features

• Professional power supply for generator excitation system with strong anti-interference

• Wide AC input range adapts to unstable power grid in power plant

• Multiple circuit protection to avoid module burnout under abnormal condition

• Metal shielding design suitable for high electromagnetic interference workshop

• Obsolete type, low stock, exclusive spare parts for old power plant renovation

8. Core Definition (Most Important)

• PMA323BE: Excitation dedicated power, AC250 old system, power plant exclusive.

• PM783F/PM866: DCS CPU power, Freelance/AC800M, conventional process control.

• Classification Rule: Excitation power > DCS power (Higher anti-interference grade).