GE DS200TCDAG1BCB Mark V Digital I/O PCB

الوصف

The GE DS200TCDAG1BCB is a specific revision of the Digital Input/Output (I/O) Printed Circuit Board (PCB), functionally known as TCDA, used in the Speedtronic Mark V Turbine Control System.

This board is responsible for interfacing the main control processors with the plant’s digital (on/off) field devices.

⚙️ Key Function and Role

The primary purpose of the DS200TCDAG1BCB (TCDA board) is to process all digital input and output signals for the turbine control logic.

• Digital Inputs (Contact Inputs): It receives 24 V DC digital signals from terminal boards (DTBA and DTBB) which indicate the status of field devices such as:
  • Limit switches (e.g., valve position)
  • Pressure and temperature switches
  • Manual operator requests (e.g., start/stop pushbuttons)
  • Alarm acknowledgments
• Digital Outputs (Contact Outputs): It transmits control signals to other boards (like the TCRA board) which then energize relays and solenoids to activate or de-activate field devices such as:
  • Start/stop commands for auxiliary motors
  • Solenoid valves for fuel, lube oil, or trip systems
  • Panel indicator lights
• Signal Communication: It uses a dedicated microprocessor to condition and transmit this digital data across the control system’s high-speed internal network, the IONET, to the redundant R, S, and T control cores.

📋 Technical Identification

The full part number DS200TCDAG1BCB breaks down to identify its specific revision within the Mark V series:

• Location: The TCDA board is typically housed in one of the Digital I/O cores, such as Q11, Q21, or Q51, within the Mark V cabinet.
• Configuration: The board includes eight hardware jumpers (J1 through J8) which are used to set its IONET address, termination resistors, and other configuration options.
• Diagnostics: LED indicators are present on the board to display power and diagnostic status for troubleshooting.

The DS200TCDAG1BCB is a core component for the sequential and functional control of a gas or steam turbine governed by the Mark V system.