IS200GGXIG1A - Expander Load Source Board

SPECIFICATIONS

Part Number: IS200GGXIG1A
Manufacturer: General Electric
Series: Mark VI
Product type: Expander Load Source Board
Availability: In Stock
Country of Manufacture: United States (USA)

Functional Description

IS200GGXIG1A is an expander load source board designed and developed by GE. It is a part of GE Mark VI control system. This board plays a critical role in controlling and isolating the high-voltage power bridge from other components within the system. It ensures smooth coordination between the IGCT (Integrated Gate-Commutated Thyristor) switching devices and associated control cards by converting RS422 electrical signals into fiber-optic signals, which are used to gate and manage the bridge’s switching operation. As a key part of GE’s Innovation Series, drives and turbine control systems enables efficient power management, signal integrity, and fault isolation, supporting the overall safety and performance of the Mark VI control architecture.

Features

• Centralized Control and Isolation: Acts as the central interface for controlling and isolating high-voltage circuits between the power bridge and other control boards, ensuring protection and safe operation of the system.
• Signal Conversion Capability: Converts RS422 differential signals into fiber-optic signals to control IGCT power switching devices, providing noise immunity and safe long-distance signal transmission.
• Multi-Device Connectivity: Supports connections to up to twelve power devices, allowing flexible and scalable power distribution across the control network.
• High Reliability Design: Designed for both Triple Redundant and Simplex configurations, depending on the system’s reliability and redundancy requirements.
• Multiple I/Os and Connectors: Equipped with a wide range of input and output connectors to interface seamlessly with other system boards.
  • Power Supply Inputs: J1–J4
  • Power Output and Feedback: J10–J12
  • Voltage Feedback: J15–J16
  • Fiber-Optic Connections: For IGCT device control
  • Dedicated Communication Connectors. JFBK Connects to the BICI board. JGATE Connects to the BPII board. J5 Monitors control power for the GDPA board
• Grounding and Noise Isolation: Features grounding stabs (LCOM and DCOM) that separate quiet (low-noise) and noisy circuits, improving signal stability and reducing electrical interference.
• Identification and Diagnostics: Includes an isolated serial ID chip for board recognition within the system, fourteen test points (TP) for on-site diagnostics, and nine LEDs for operational monitoring and fault indication.

Installation and Handling Guidelines

Due to the presence of high surface voltages, they must be installed and handled with strict adherence to GE’s recommended safety procedures. Improper handling may lead to equipment damage or electrical hazards. The following key precautions must be followed:

• Storage: Always store the board in anti-static bags or containers to prevent electrostatic discharge (ESD) damage.
• Grounding: Use a wrist grounding strap when handling or installing the board.
• Power Safety: Ensure the device is completely powered down before removal or installation.
• Mounting Hardware: Remove the seven mounting screws carefully after power-off; ensure star washers are correctly matched with the corresponding metal standoffs during reinstallation.

Role in the Mark VI System

Within the GE Mark VI control environment, it acts as a communication and control hub between the high-power sections and logic-level control boards. By handling the electrical-to-optical signal conversion and managing isolation between circuits, it ensures:

• Safe control of power conversion and distribution
• Reduced electromagnetic interference (EMI)
• Accurate gating control for IGCT-based power bridges 

WOC is happy to assist you with any of your automation requirements. Please contact us by phone or email for pricing and availability on any parts and repairs.

FREQUENTLY ASKED QUESTIONS

What is IS200GGXIG1A?
It is an expander load source designed and developed by GE.

How does the Expander Load Source card communicate with other boards?
The board uses several connectors for communication and power management. JFBK connects to the BICI board. JGATE connects to the BPII board. J5 monitors control power for the GDPA board. It also uses fiber-optic connectors for communication with the IGCT switching devices.

Does the Board have any adjustable components or fuses?
No. The board does not include adjustable hardware devices or fuses. This design minimizes user intervention and reduces calibration needs.

What diagnostic features are available on the board?
The Board includes test points (TPs) for voltage and signal monitoring, and LED indicators for operational status and fault detection, enabling efficient troubleshooting.