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GE DS215DMCAG2AZZ02A DOS Main Control Board
The GE DS215DMCAG2AZZ02A is a critical, highly-integrated printed circuit board assembly used in General Electric’s industrial control systems, most famously the Speedtronic Mark V Turbine Control System.
The designation “DOS Main Control Board” often refers to its role as a key logic and interface component that manages system functions and interacts with the control environment.
⚙️ Key Specifications and Function
| Feature | Specification/Description |
| Product Type | Drive Main Control Assembly (DMCA) / Processor Interface Board |
| Series/Family | GE Speedtronic Mark V Turbine Control Systems and Industrial Drives (e.g., DC2000) |
| Core Function | Logic and Interface Management. This board acts as a vital link between the main control processor (like the UCOM board) and several key subsystems, including: * Operator Interface: Handles data flow from the local keypad/display (HMI). * Data Logging: Manages and buffers data for event and fault history. * Control Logic: Executes critical low-level or specialized logic within the drive/turbine control framework. |
| Architecture | It is a module that plugs into the VME rack of the Mark V system, where it manages communication and control of various peripherals and local I/O. |
| Firmware Role | The suffix AZZ02A is highly significant, indicating that the board is pre-loaded with a specific firmware/software package. This specific firmware defines the board’s exact operational logic and compatibility with the overall system control program. |
| Revision Level | The G2 specifies the Group 2 hardware revision, indicating an update or change from earlier Group 1 (G1) versions of the same DMCA board, likely involving component changes or minor layout modifications. |
In short, the DS215DMCAG2AZZ02A is a fundamental piece of the Mark V’s modular system, dedicated to handling the interface, diagnostics, and essential logic required to ensure reliable control and monitoring of a gas or steam turbine.




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+86 15340683922