GE DS200UCPBG5AFB IO Engine CPU Board

الوصف

The GE DS200UCPBG5AFB is a critical component known as the I/O Engine CPU Board (Input/Output Engine Central Processing Unit Board) for the General Electric Speedtronic Mark V Gas and Steam Turbine Control System.

This board’s main function is to handle the acquisition, processing, and communication of field data for the turbine’s main controllers.¹

💻 Key Function of the UCPB Board

The DS200UCPBG5AFB (UCPB) acts as a specialized processor that offloads the routine I/O processing from the main, redundant control processors ($\text{R, S, T}$).

1. I/O Data Acquisition: It is installed within one of the I/O Engine cores of the Mark V control panel, typically as a daughtercard mounted on a larger board like the ²$\text{STCA}$.³ Its role is to read the raw input signals (both analog and digital) that have been terminated by the I/O termination boards (like $\text{DTBA}$ or $\text{TBQA}$).
2. Data Processing and Packaging: The on-board processor (⁴$\text{CPU}$), typically an 80486DX, processes and packages this I/O information.⁵
3. COREBUS Communication: The processed data is then broadcast over the high-speed COREBUS (an ⁶$\text{ARCNET}$ LAN) network.⁷ This allows the main control cores ($\text{R, S, T}$) to receive the updated field values needed for the turbine’s control and protection logic.
4. Configuration: The board contains ⁸$\text{DRAM}$ and ⁹$\text{EPROM}$ for memory and firmware.¹⁰ It also includes DIP switches and jumpers used to set the ¹¹$\text{COREBUS}$ address for the specific I/O Engine it resides in, ensuring proper communication within the redundant system.¹²

In short, the UCPB board is the microprocessor interface that links the physical turbine sensors and actuators to the digital brains of the $\text{Mark V}$ control system.

📋 General Specifications

The DS200 prefix signifies that this board belongs to the $\text{DS200}$ product series, which is a collection of circuit boards and components used in the $\text{Mark V}$ control system.