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The GE DS200TCPDG1A Power Distribution Board (TCPD) is an essential printed circuit board (PCB) used in the GE Speedtronic Mark V Turbine Control System.1 Its primary function is to efficiently manage and distribute electrical power to the various components, cores, and I/O (Input/Output) boards within the Mark V control panel.2
⚙️ Key Function and Specifications
The DS200TCPDG1A is crucial for system stability, acting as a power hub and protection center for the control electronics.3
- Primary Function: It takes the main power supply (typically 125 VDC) and distributes it to critical system components, including the main processor core, I/O power supply boards (TCPS), and emergency overspeed boards (TCEA).4 It may also provide $\text{AC}$ power (120/240 VAC) for elements like ignition transformers.
- Location: It is physically located within the
<PD>Core (Power Distribution core) of the Mark V cabinet.5 - Circuit Protection: A vital feature is the integrated circuit protection provided by multiple fuses.6
Hardware Features
The board is equipped with several components for power management and status indication:
| Component | Quantity | Purpose |
| Fuses | $\text{36}$ | Provide overcurrent protection for individual circuits. |
| OK LEDs | $\text{36}$ | Green LEDs that correspond to each fuse. A lit LED indicates the fuse is operational (good). |
| Toggle Switches | $\text{8}$ | Used for manual control, often to selectively power down individual cores for maintenance. |
| Signal Terminals | $\text{4}$ | Used for connecting copper signal wires to other components. |
| Connector | $\text{1}$ | A $\text{10}$-pin connector for system connection. |
| Jumper | $\text{1}$ | A manually-movable hardware jumper (BJS) is used to select for the isolation of the ground reference for systems with an external reference. |
The “A” in the part number (DS200TCPDG1A) signifies the first functional revision of the base DS200TCPDG1 Power Distribution Board design.7 Subsequent revisions, such as the DS200TCPDG1B, often incorporate minor design changes or component updates.
