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The GE IS200AVIFH1A is a specialized Printed Circuit Board (PCB) component from General Electric’s Mark VI Speedtronic Turbine Control System.1
Its functional acronym, AVIF, stands for Auxiliary Voltage Interface or Auxiliary Interface Board. This board is a critical communication and I/O interface, typically used in drive systems integrated with the turbine control platform.2
⚙️ Product Profile: IS200AVIFH1A
The IS200AVIFH1A is a “Normal Assembly” PCB (IS200 series) designed for internal mounting within a control cabinet, connecting various auxiliary control signals to the main processor.
| Parameter | Specification/Detail |
| Functional Acronym | AVIF (Auxiliary Voltage Interface / Auxiliary Interface Board) |
| System Family | GE Mark VI Speedtronic / Drive Control Series. |
| Primary Function | Acts as an I/O and communication bridge for auxiliary control systems or voltage monitoring functions, particularly in drive applications. |
| I/O and Connectivity | The board features dense circuitry and multiple connectors, including several vertical female plug connectors ($\text{P1}$ to $\text{P8}$) and is populated with numerous integrated circuits, resistors, and capacitors for signal conditioning. |
| Environmental Protection | Typically includes a Conformal Coating for protection against moisture and contaminants. |
| Revision | H1A specifies the exact hardware and firmware revision. |
🛠️ Key Technical Features and Function
The AVIF board’s role is to ensure reliable communication and signal integrity for supporting systems peripheral to the core turbine control:
- Auxiliary Monitoring: It often handles the interface for monitoring various auxiliary voltages or power supply states within the drive or control rack, ensuring power stability is reported accurately to the main controller.
- Signal Bridging: It serves as a bridge, translating or conditioning signals between a proprietary bus (or auxiliary device) and the main Mark VI control network (like IONet or ISBus).
- Isolation: The board incorporates necessary isolation circuitry to protect the sensitive control electronics from the higher voltages and noise found on the auxiliary power interfaces.3
⚠️ Important Considerations for Replacement
- Revision Match is Crucial: The H1A suffix must be matched exactly when sourcing a replacement. GE Mark VI systems are highly sensitive to revision differences, and an incompatible board may result in communication failures or incorrect signal interpretation.
- ESD Precautions: Due to its density of sensitive electronic components, strict Electrostatic Discharge (ESD) handling procedures must be followed during installation.
