IS200GDDDG1ACA - Dynamic Discharge board

IS200GDDDG1ACA - Dynamic Discharge board IS200GDDDG1ACA - Dynamic Discharge board

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Part No.: IS200GDDDG1ACA
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
PCB Coating: Conformal
Technology: Surface-mount
Temperature Operating: -30 to 65oC
Product Type: Dynamic Discharge board
Availability: In Stock
Series: EX2100

Functional Description

IS200GDDDG1ACA is a dynamic discharge board developed by GE. It is a part of EX2100 excitation system. The Gate Driver and Dynamic Discharge board play a critical role in facilitating the interface isolation between the Insulated Gate Bipolar Transistors (IGBTs) and the main processor firing circuits of the EX2000 Pulse Width Modulation (PWM) based exciter. This board serves as a crucial link in ensuring seamless communication and operation between these essential components within the excitation system.


  • One of the primary functions of the board is to provide interface isolation between the IGBTs and the main processor firing circuits. This isolation is essential for preventing electrical interference and ensuring the reliable transmission of signals between the components, thereby maintaining the integrity of the excitation system.
  • Furthermore, the board is responsible for implementing dynamic discharge circuit control, which is crucial for managing the discharge of energy from the system's capacitors. By regulating the dynamic discharge process, the board helps optimize system performance and protect against potential damage or malfunction.
  • In addition to interface isolation and dynamic discharge control, the board also houses gating circuits for the A leg and B leg active IGBTs. These circuits play a pivotal role in controlling the switching of the IGBTs, ensuring precise timing and synchronization to achieve the desired excitation output.
  • Moreover, the board serves as a hub for instrumentation within the EX2000 PWM system. It processes vital parameters such as output DC voltage, DC link voltage, shunt current millivolt input, and heat sink thermistor input. These measurements are essential for monitoring system performance and stability, providing valuable data for use by the regulators.
  • The data processed is then transmitted to the Load Drop Compensation Control (LDCC) processors for further analysis and utilization by the regulators. This integration allows for real-time monitoring and adjustment of excitation parameters, ensuring optimal performance and stability of the system under varying operating conditions.


  • JP1 Jumper: Configuration for DC Output Voltage Input Level
    • JP1 jumper plays a crucial role in configuring the input level of the DC output voltage inputs APL-6 and BPL-5. It is imperative that the setting of JP1 aligns precisely with the predetermined value specified in EE.612 (VDCMAX). Ensuring this alignment guarantees the compatibility and accurate processing of the DC output voltage signals by the board.
  • JP2 Jumper: Configuration for DC Link Voltage Input Level
    • Similar to JP1, JP2 jumper is responsible for configuring the input level of the DC link voltage to the board inputs CPL-12 and CPL-2. As with JP1, it is crucial that the setting of JP2 corresponds precisely with the predetermined value specified in EE.612 (VDCMAX). This alignment ensures that the GDDD board accurately interprets and processes the DC link voltage signals, facilitating seamless operation within the system.
  • JP3 Jumper: Configuration for DC Dynamic Discharge Reference Level
    • JP3 jumper is dedicated to configuring the input level of the DC dynamic discharge reference to the GDDD board, specifically on inputs CPL-12 and CPLCOM. It is essential for JP3 to correspond to the level specified in EE.612 (VDCMAX) to ensure accurate and reliable operation. For instance, if EE.612 is set to 604, JP3 should be configured to 500, whereas if EE.612 is set to 360, JP3 should be configured to 300. This precise alignment guarantees optimal performance and functionality of the dynamic discharge reference circuitry.

LED Indicators

  • LED Bridge OK (DS100): The LED labeled Bridge OK serves as an indicator of the operational status of the IGBT bridge. When illuminated, it signals that there are no faults detected in the IGBT legs and that no overcurrent condition has been detected. This LED provides reassurance regarding the integrity of the IGBT bridge, ensuring smooth and reliable operation without any critical faults.
  • LED IMOK (DS101): The IMOK LED on the board serves as a comprehensive status indicator, providing insights into various aspects of the system's health and functionality. When lit, it signifies several key conditions:
    • Absence of bridge faults: Indicates that there are no faults detected in the IGBT bridge, ensuring the integrity of the power conversion process.
      Unit not in reset condition: Indicates that the unit is operational and not in a reset state, ensuring continuous functionality and readiness.
    • Power supply voltages are OK: Confirms that the power supply voltages are within acceptable limits, ensuring stable operation of the board.
      Absence of dynamic discharge faults: Signals that there are no faults detected in the dynamic discharge circuitry, ensuring efficient management of energy discharge processes.
    • The IMOK LED provides a comprehensive overview of the operational health of the GDDD board, allowing operators to quickly assess the system's status and identify any potential issues that may require attention.
  • LED DD AUX POWER AVAILABLE (DS102):The LED labeled DD AUX POWER AVAILABLE indicates the availability of auxiliary power for the dynamic discharge circuit. When illuminated, it confirms that the auxiliary power required for the dynamic discharge circuit is readily available from the DC link source via the RDS connection. This LED ensures that the dynamic discharge circuitry has the necessary power supply to function effectively, facilitating proper energy management and system operation.

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

Frequently Asked Questions

What is IS200GDDDG1ACA?
It is a high-speed serial-link interface board developed by GE under the EX2100 series.

What is Connector BPL used for on the board?
Connector BPL facilitates IGBT Leg B control and connects to the IAXS board.

What is the purpose of Connector CPL?
Connector CPL is utilized for IGBT Dynamic Discharge control and links to the IAXS board. 

What functionality does Connector SHPL serve?
Connector SHPL connects to the output shunt, providing current feedback into the control system.

How is Connector THPL utilized?
Connector THPL is employed for temperature sensing and connects to the heatsink-mounted thermistor.