GE IS200ISBBG2AAB

Description

Introduction to the GE IS200ISBBG2AAB

Product Description

The GE IS200ISBBG2AAB is a specialized I/O termination board from the Mark VI or Mark VIe series, a core component of GE’s Speedtronic family for gas and steam turbine control. This board, often categorized as a Servo Drive Termination Board or I/O Pack Interface board, serves as the critical interface between the turbine control system’s servo drive controllers and the hydraulic servo valves that precisely position fuel actuators, inlet guide vanes (IGVs), and other critical control elements. The GE IS200ISBBG2AAB provides the termination points, signal conditioning, and feedback loop connections necessary for the precise closed-loop control of these hydraulic actuators. Its design ensures robust and reliable signal transmission in the high-vibration, electrically noisy environment of a turbine enclosure. The correct functioning of the IS200ISBBG2AAB is paramount for achieving accurate and stable turbine load, speed, and temperature control.

Product Parameters

• Product Series: GE Mark VI / Mark VIe Speedtronic Turbine Control

• Board Model: IS200ISBBG2AAB

• Module Type: Servo Drive Interface / Termination Board

• Function: Interfaces servo drive command signals and receives Linear Variable Differential Transformer (LVDT) or other position feedback signals from hydraulic actuators.

• Inputs: Accepts analog command signals (e.g., +/-10 VDC) from the servo drive controller and position feedback signals from the actuator’s LVDT.

• Outputs: Provides conditioned signals to the servo valve coils and connections for actuator solenoid valves.

• Connections: Features robust screw terminal blocks for field wiring (to the actuator/LVDT) and a multi-pin connector for integration into the ISBB servo I/O pack or rack.

• Compatibility: Designed to work specifically with GE’s servo drive modules and defined hydraulic actuator models.

Advantages and Features

The key advantage of the GE IS200ISBBG2AAB is its dedicated, system-optimized design for a critical and high-speed control loop. It provides precise signal interfacing and conditioning that minimizes noise and ensures the integrity of the low-level analog signals used for position control. The board’s construction is ruggedized for the turbine environment, with secure terminal connections resistant to vibration-induced loosening. It facilitates organized and reliable wiring between the electronic control system and the hydraulic power unit. As a genuine GE component, it guarantees electrical compatibility and performance within the validated Mark VI/e control architecture, ensuring the servo loop operates as designed for optimal turbine response and stability.

Application Cases in Industry

This interface board is used exclusively in the control systems of large rotating equipment, primarily in power generation. Its sole application is within gas turbine and steam turbine control systems. Specifically, the GE IS200ISBBG2AAB is integral to the control loops that manage fuel flow actuators (for controlling turbine speed and load) and compressor inlet guide vane (IGV) actuators (for optimizing compressor efficiency and controlling inlet airflow). In a combined cycle power plant, it would be used on both the gas turbine and potentially on steam turbine control valves. The precision enabled by this board directly impacts combustion stability, emissions, load-following capability, and overall plant efficiency.

Comparison with Competing Products

Competing products are similar servo interface termination boards from other turbine control OEMs like Siemens (SPPA-T3000) or Woodward (NetCon). The GE IS200ISBBG2AAB is not a generic interface card; it is a proprietary component of the integrated GE Speedtronic system. Its value lies in its pre-engineered, tested, and validated integration with specific GE servo drives (like IS200 series cards) and actuator types. Third-party or universal signal conditioners lack the specific pinouts, form factor, and backplane communication required for this application. The IS200ISBBG2AAB is a critical link in a certified control system where performance and safety are non-negotiable.

Selection Suggestions and Precautions

Selection of the GE IS200ISBBG2AAB is entirely dictated by the existing turbine control system’s bill of materials and the specific servo loop it is designed for (e.g., fuel actuator vs. IGV actuator). It is crucial to verify the board’s compatibility with the exact Mark VI/e I/O pack (ISBB rack) and servo drive module it will be connected to. The part number suffix (G2AAB) indicates a specific hardware revision that must be matched. The board must be configured in the control software to match the connected actuator’s LVDT type and feedback scaling.

Precautions:

• Installation and wiring must be performed by technicians trained on GE turbine control systems. The system must be de-energized and locked out/tagged out (LOTO).

• Extreme care must be taken with LVDT wiring; incorrect wiring will lead to erratic or unstable control behavior.

• All wiring must be performed using the specified wire types, with proper shielding and separation from power cables to prevent signal interference.

• After installation, the entire servo loop (command signal, valve output, LVDT feedback) must be thoroughly calibrated and tested according to GE’s commissioning procedures.

• Using an incorrect or non-genuine termination board can cause control instability, poor turbine performance, or even a forced shutdown.

1771-IVN AB
1794-IB16 AB
2711-K6C16 AB
1756-0F8 AB