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GE IS200EDEXG1A

Excitation Digital Excitation Control Board (EDEX board) for GE EX2100 and Mark VI excitation control systems.
  • Product Introduction: A high-performance digital excitation control board developed by GE, serving as a critical component in the EX2100 excitation control system. Provides digital excitation control, signal processing, and feedback monitoring for generator excitation systems, executing real-time digital control algorithms for field voltage regulation.
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Detailed content

  • Technical Specifications:
    • Manufacturer: GE Industrial Systems
    • Product Family: EX2100 / Mark VI Excitation Control System
    • Module Type: EDEX Board
    • Dimensions (H×W×D): 241 × 160 × 25 mm
    • Weight: 0.55 kg
    • Input Signals: Field voltage, field current, DC and AC feedback signals, digital status inputs
    • Output Signals: Digital control signals to SCR bridge or excitation output
    • Signal Processing: Real-time digital control algorithms for field voltage regulation
    • Communication Interface: ISBus / Backplane communication to system controller
    • Isolation: Galvanic isolation between control and field circuits
    • Power Supply: Backplane powered
    • Operating Temperature: 0 °C to +60 °C
    • Storage Temperature: -30 °C to +65 °C
    • Relative Humidity: 5% to 95% non-condensing
    • Mounting: Rack-mounted printed circuit board with standard card slot/backplane
    • Redundancy: Compatible with redundant excitation architectures
    • Lifecycle Status: Obsolete / Legacy product
  • Core Functions:
    • Provides digital excitation control, signal processing, and feedback monitoring for generator excitation systems
    • In the field discharge module, conducts induced feedback, voltage holding, and SCR firing for field discharge
    • Controlled by EXTB module, supports dual control inputs
    • Uses Hall-effect conduction sensors
    • Internal conversion voltage: 125 VDC (input power: 24 VDC from ESPM module)
    • Manual Reference: GEI-100466
  • Diagnostic Features: Onboard diagnostics, fault detection, status monitoring, LED indicators (Power, Status, Communication, Fault, Output Status).
  • Functional Features: As the main PCB/bridge protection board in the field discharge module, it stores and dissipates the enormous energy released by the generator during shutdown; ensures rapid response and safe field discharge during normal shutdown or emergency power failure.
  • Applications: Generator excitation control, automatic voltage regulation, turbine automation, industrial power generation, generator shutdown energy dissipation, and power system protection.
  • Usage Notes: As a legacy GE control-system component, refurbished, surplus, and replacement units are generally available through industrial automation suppliers.

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