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The GE IS200DSPXH2CAA Digital Signal Processor Control Board (DSPX) is a high-performance printed circuit board that acts as a primary, real-time controller in General Electric’s advanced industrial control systems.1
It is a key component within the GE Speedtronic Mark VI Turbine Control System, Innovation Series Drives, and the EX2100 Excitation Control Series.2 The suffix H2CAA denotes its specific hardware and firmware revision.
🧠 Core Functions
The DSPX board is the computational heart of its control system, utilizing a powerful Digital Signal Processor (DSP) to execute complex, time-critical control algorithms:3
- Generator Field Control: It manages the generator field control functions for the EX2100 Excitation Control system, which is crucial for regulating the output voltage and reactive power of large synchronous generators.4
- Industrial Drives Control: It is the primary controller for the bridge, motor regulator, and gating functions within the Innovation Series Drives.5 This involves accurately timing and controlling the power semiconductor switches (IGBTs) for precise regulation of motor speed, torque, and position.
- Logic and Interface: The board handles all necessary logic, processing, and interface functions, providing a high-speed digital replacement for traditional analog controls.6
⚙️ Key Technical Features
The IS200DSPXH2CAA is engineered for robust industrial performance and features:7
| Feature | Details |
| Processor | High-performance 60 MHz Digital Signal Processor (DSP) |
| Custom Logic | Integrates an Application-Specific Integrated Circuit (ASIC) for custom logic functions. |
| I/O Interfaces | Features two high-speed ISBus interfaces (5 Mb/s) for proprietary serial communication with other control boards. |
| Feedback Inputs | Includes specialized inputs, such as five differential HIFI (High-Frequency Input) pairs, used for high-speed signals like tachometer or encoder feedback. |
| Memory | Uses FLASH (for boot code and application firmware), RAM (for execution), and NVRAM (nonvolatile data storage). |
| Diagnostics | Equipped with a watchdog timer and interrupt logic (like Stack Overflow detection) to monitor system integrity. |
| Front Panel | Features a faceplate with two LED indicators (typically Red for Fault and Green for Status) for visual health checks. |
The board plays a vital role in real-time synchronization, aligning its software execution, ISBus communication, and gating outputs with the power bridge’s operational pulses.8
