GE Mark VI IS200ISBAH1ABA is a printed circuit board created by GE for the Mark VI series. This board is part of GE's speedtronic series.

GE Mark VI IS200ISBAH1ABA is a printed circuit board created by GE for the Mark VI series. This board is part of GE’s speedtronic series.

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GE IS200ISBAH1ABA is an InSync ISBus Daughter Board used in General Electric’s Mark VI Speedtronic Turbine Control System and the EX2100 Excitation System.

This board is critical for high-speed, synchronized data communication within the control rack, especially in redundant systems.

⚙️ Function and Role

The primary role of the IS200ISBAH1ABA is to provide the communication interface for the proprietary ISBus protocol:

  • ISBus Communication: It includes two ISBus communication channels to facilitate real-time, high-speed data transfer and synchronization between control processors in the system.

  • Redundancy (TMR): In Triple Modular Redundant (TMR) architectures (like those used in the Mark VI for high reliability), the ISBus ensures that the three independent control modules are precisely synchronized (InSync), enabling bumpless transfer and voting logic.

  • System Attachment: The board is a small replacement or daughter board that physically attaches to a main processor card, such as the ACLI (Application Control Layer Module). The ports on the ACLI that interface with this board are typically labeled INSYNC A and INSYNC B.

  • PC/104 Standard: The board utilizes the PC/104 form factor and bus, which is a modular, stackable, and rugged embedded computer standard ideal for the industrial environment of a turbine control panel.

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The GE IS200ISBAH1ABA is an InSync ISBus Daughter Board used in General Electric’s Mark VI Speedtronic Turbine Control System and the EX2100 Excitation System.

This board is critical for high-speed, synchronized data communication within the control rack, especially in redundant systems.

⚙️ Function and Role

The primary role of the IS200ISBAH1ABA is to provide the communication interface for the proprietary ISBus protocol:

  • ISBus Communication: It includes two ISBus communication channels to facilitate real-time, high-speed data transfer and synchronization between control processors in the system.

  • Redundancy (TMR): In Triple Modular Redundant (TMR) architectures (like those used in the Mark VI for high reliability), the ISBus ensures that the three independent control modules are precisely synchronized (InSync), enabling bumpless transfer and voting logic.

  • System Attachment: The board is a small replacement or daughter board that physically attaches to a main processor card, such as the ACLI (Application Control Layer Module). The ports on the ACLI that interface with this board are typically labeled INSYNC A and INSYNC B.

  • PC/104 Standard: The board utilizes the PC/104 form factor and bus, which is a modular, stackable, and rugged embedded computer standard ideal for the industrial environment of a turbine control panel.

🔌 Hardware Features

The IS200ISBAH1ABA is a compact, component-dense board designed for reliable operation:

  • Integrated Circuits: It is populated with several integrated circuits, including two larger processors specifically dedicated to managing the ISBus data and synchronization logic.

  • Connectors: It includes a PC/104 port and a Header Port for modularity, and a P1 pin connector for direct connection to other system components.

  • Status Indicators: Each ISBus communication channel has two status LEDs for diagnostics:

    • A Green LED indicates the board is online and actively communicating.

    • A Yellow REC (Record) LED signals that the board is receiving/recording signals from the network.

  • Protection: The board typically features a conformal PCB coating—a thin, protective layer applied to the PCB to guard against moisture, dust, and corrosion in harsh industrial settings.

The suffix H1ABA indicates a specific assembly or manufacturing revision of the base IS200ISBAH1A design.

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