Description
Product Overview
The GE IS200ISBBG2AAB is an essential I/O (Input/Output) terminal board designed for the GE Mark VI family of gas and steam turbine control systems. This critical component functions as a specialized interface module, connecting sensor signals and actuator commands between the field devices and the system’s central controller. Engineered for high reliability in demanding power generation environments, the GE IS200ISBBG2AAB ensures precise signal conditioning and distribution.
Product Parameters
- Series Compatibility: Designed for the GE Mark VI Speedtronic Turbine Control System.
- Function: Serves as a dedicated terminal board for interfacing discrete (on/off) and analog signals.
- Connections: Features a robust terminal block assembly for secure field wiring connections to devices like solenoid valves, pressure switches, temperature sensors, and relay contacts.
- Board Identification: The “ISBB” functional code identifies its specific role within the I/O pack assembly, and the “G2AAB” suffix indicates the hardware revision and configuration level.
- Integration: Plugs directly into a designated slot within a Mark VI I/O pack enclosure (e.g., an IS200 I/O Pack), connecting via a high-density backplane connector.
- Environmental Specifications: Designed to operate within the controlled environment of a turbine control cabinet, with typical industrial temperature and humidity ranges.
Advantages and Key Features
- High Reliability & Precision: As a genuine GE component, the GE IS200ISBBG2AAB is manufactured to exacting standards, providing reliable signal integrity critical for safe turbine operation.
- System Integration: It offers seamless, plug-and-play compatibility within the Mark VI ecosystem, ensuring correct communication and power distribution from the central processor.
- Secure Connection Design: The terminal block design ensures vibration-resistant and reliable field wiring connections, a crucial feature in power plant environments.
- Diagnostic Support: When used within the full Mark VI system framework, it contributes to the platform’s comprehensive diagnostic capabilities, aiding in troubleshooting and maintenance.
- Simplified Maintenance: Being a modular component, the GE IS200ISBBG2AAB allows for quick replacement during scheduled maintenance or troubleshooting, minimizing turbine downtime.
Application Examples in Various Fields
- Gas Turbine Power Plants: A primary application for the GE IS200ISBBG2AAB is in combined-cycle and simple-cycle power plants, where it interfaces critical permissives, alarms, and control signals for fuel valves, inlet guide vanes, and ignition systems.
- Steam Turbine Control: Used in conventional and nuclear power facilities to manage and monitor steam valve positions, lube oil system pressures, and other vital protection sequences.
- Industrial Turbomachinery: Applied in mechanical drive applications, such as in compressor or pump stations in oil & gas pipelines, where reliable turbine control is essential for process stability.
- Aeroderivative Turbines: Utilized in smaller, mobile gas turbine units used for power generation or marine propulsion, benefiting from the Mark VI system’s compact and robust control architecture.
Comparison with Competing Products
The GE IS200ISBBG2AAB is a proprietary component within the closed architecture of the GE Mark VI system. Direct comparisons with generic I/O modules from PLC manufacturers (e.g., Siemens, Allen-Bradley) are not applicable, as it is not a standalone product. Its competition primarily comes from:
- Third-Party Reconditioned/Compatible Parts: While often lower in cost, these parts may not meet the original GE material and testing specifications, potentially risking system integrity and voiding OEM support agreements.
- OEM Upgrades: GE may offer newer-generation terminal boards or I/O packs as part of system upgrades. The GE IS200ISBBG2AAB represents a specific, field-proven revision within a mature product line.
Selection Suggestions and Precautions
- Exact Part Number Verification: The Mark VI system has numerous terminal board variants. It is critical to match the full part number GE IS200ISBBG2AAB exactly, including the suffix (G2AAB), as different revisions may have incompatible pinouts or circuitry.
- System Compatibility: Confirm this board is specified for your exact Mark VI I/O pack model and rack configuration. Using an incorrect terminal board can cause system faults or damage.
- Source Authenticity: Always procure this component from authorized GE distributors or highly reputable suppliers specializing in turbine parts to avoid counterfeit products. Verify the product link for authenticity: GE IS200ISBBG2AAB.
- Handling and Installation: Practice strict ESD (Electrostatic Discharge) precautions when handling the board. Ensure the I/O pack is powered down and properly locked out before installation or removal.
- Configuration and Testing: After installing a new GE IS200ISBBG2AAB, the associated control application software may require verification. Full loop testing of the connected field signals is essential before returning the turbine to service.

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