IS200EDCFG1AED - Exciter DC Feedback Board

IS200EDCFG1AED - Exciter DC Feedback Board IS200EDCFG1AED - Exciter DC Feedback Board

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Part No.: IS200EDCFG1AED
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 17.8 cm high x 33.02 cm wide
Technology: Surface mount
Product Type: Exciter DC Feedback Board
Availability: In Stock
Series: EX2100

Functional Description

IS200EDCFG1AED is a Exciter DC Feedback Board developed by GE. It is a part of EX2100 control system. The board performs precise measurements of field current and voltage at the SCR bridge, critical parameters for excitation control systems. Utilizing a high-speed fiber-optic link, the board establishes communication with the EISB board in the control panel, ensuring rapid and reliable data transmission.


  • Voltage Isolation: The fiber-optic link provides essential voltage isolation between the board and the EISB board, safeguarding against electrical interference and ensuring system integrity.
  • Noise Immunity: By leveraging fiber-optic technology, the communication link offers high noise immunity, minimizing the impact of electromagnetic interference and ensuring accurate data transmission even in noisy environments.
  • Fiber Types: The board supports two types of fibers to accommodate varying distances, Plastic type fiber suitable for distances up to 10 meters. Hard-clad silica type fiber suitable for distances up to 90 meters. Both fiber types have a minimum bending radius of 1.5 inches, ensuring proper cable handling and installation to maintain signal integrity.
  • Signal Transmission: Each signal (field current and voltage) is transmitted over a dedicated fiber optic cable, optimizing signal integrity and minimizing crosstalk between measurements.
  • Installation Flexibility: The availability of two fiber types allows for flexibility in installation, enabling optimal configuration based on the specific distance requirements of the application.

Power Supply

  • Voltage Regulation: Within the board, three voltage regulators are employed to convert the incoming ±24 V dc supply into three distinct voltage levels: +15 V dc, -15 V dc, and +5 V dc.
  • Regulated Outputs: The voltage regulators ensure stable and precise outputs, providing the necessary voltage levels required for the proper functioning of the EDCF board and associated components.
  • Indicator LED: A green LED labeled PSOK (Power Supply OK) is integrated. This LED is illuminated when the ±15 V dc output voltages from the voltage regulators are within the specified range, indicating that the power supply is functioning correctly.
  • Operational Status: The PSOK LED serves as a visual indicator of the operational status of the power supply, providing immediate feedback on the health of the voltage regulation system.
  • Monitoring Function: By monitoring the illumination of the PSOK LED, operators can quickly assess the integrity of the power supply and identify any potential issues with voltage regulation. This facilitates prompt troubleshooting and maintenance actions, minimizing downtime and ensuring continuous operation of the system.


  • Power Input Connector (J16): Connector J16 serves as the interface for the 24 V dc power input into the board, ensuring a reliable power supply to support its operation and functionalities.
  • Voltage Across Field Current Shunt (P1): Connector P1 is designated for bringing in the voltage measurement across the field current shunt resistance, facilitating accurate monitoring and control of field current levels within the system.
  • Field Voltage Input (E1): The field voltage input, denoted as E1, utilizes a stab-on connection mechanism, providing a secure and efficient interface for connecting the field voltage signal to the board.
  • Feedback Connections: Feedback signals, including current and voltage readings, are transmitted to the control system via fiber-optic connectors. These connectors ensure reliable and high-speed communication between the EDCF board and the control unit, enhancing system performance and responsiveness.
  • Fiber-Optic Connectivity: Utilizing fiber-optic for feedback connections offers numerous advantages, including immunity to electromagnetic interference, high noise tolerance, and secure transmission over long distances. This ensures accurate and reliable data transmission critical for proper system operation and control.

The WOC team is always available to help you with your EX2100 requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS200EDCFG1AED?
It is a Exciter DC Feedback Board developed by GE under the EX2100 series.

How is the field voltage scaled in the feedback circuit?
The field voltage feedback circuit provides seven selector settings to scale down the bridge voltage based on the specific bridge application.

What does the field voltage measurement involve?
Field voltage is measured across the negative terminal of the bridge and the positive terminal of the current shunt, followed by scaling with jumpered resistors.

How is field current measured?
Field current is measured across a DC shunt at the SCR bridge, generating a low-level signal (up to 500 mV) input to a differential amplifier.