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GE IS200AEPAH1BKE is a highly specific Printed Circuit Board (PCB) from the General Electric Mark VI Speedtronic Turbine Control System.1
Its core function is defined by the acronym AEPA, which stands for Alternative Energy Pitch Axis. This board is a crucial I/O and Interface module dedicated to managing the complex control signals for wind turbine blade pitch control and related high-density auxiliary systems.
⚙️ Product Profile: IS200AEPAH1BKE
The IS200AEPAH1BKE is a “Normal Assembly” PCB (IS200 series) designed for internal mounting within the Mark VI control cabinet. The highly detailed suffix specifies its precise revision and configuration.
| Part Segment | Meaning | Detail |
| IS200 | Board Series | Component in the GE Mark VI Speedtronic System. |
| AEPA | Functional Acronym | Alternative Energy Pitch Axis. Primary role is in wind turbine control systems. |
| H1 | Assembly Variant | Denotes the specific hardware version utilizing Surface-Mount Technology (SMT). |
| BKE | Revision/Configuration | Specifies the exact functional revision (B), and subsequent configuration or production release codes (K and E). This detailed revision is critical for replacement. |
🛠️ Key Technical Features and Function
The AEPA board’s complex I/O suite is tailored to the demanding, real-time control requirements of modern wind turbine blades:
- Pitch Control Interface: It provides the necessary inputs and outputs to interface with the pitch mechanism of the wind turbine blades, which adjusts the blade angle to control power output and limit rotor speed during high winds.
- High-Density I/O: The module integrates a variety of signal types on a single board, which typically include:
- Analog Inputs (2$\text{AI}$) and Discrete Inputs (3$\text{DI}$) for monitoring blade angle, hydraulics, limit switches, and system status.4
- Relay Outputs (5$\text{RO}$) for switching contactors and solenoids for the pitch drive, yaw control, or brake mechanisms.6
- Dedicated inputs for Incremental and Absolute Encoders, providing precise feedback on the actual blade position and speed—essential for safety and efficiency.
- Environmental Protection: Like most boards in the IS200 family used in exposed environments (such as wind farms), this board typically features a Conformal Coating for protection against moisture, dust, and corrosive elements.
- Redundancy Support: The module is designed to be compatible with the Mark VI’s control architecture, which supports Simplex, Dual, and Triple Modular Redundant (TMR) configurations.
⚠️ Important Considerations for Replacement
- Revision Match is Critical: The specific suffix H1BKE must be matched exactly when sourcing a replacement. GE Mark VI systems are highly sensitive to revision differences, and an incompatible revision can lead to catastrophic control errors in the pitch system.
- Application-Specific: Due to its Pitch Axis focus, this is not a generic I/O board. Its functionality is tightly linked to the specific control algorithms of the wind turbine it controls.
