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The GE DS200TBCAG2AAB Analog I/O Terminal Board is a Resistance Temperature Detector ($\text{RTD}$) Termination Module (Functional Acronym: TBCA) used within the General Electric Mark V Speedtronic Turbine Control System.
Its primary function is to serve as the physical interface between $\text{RTD}$ sensors in the field and the main analog processing board of the control system.
Function and Specifications
Primary Role
The $\text{TBCA}$ board is essentially a $\text{pass-through}$ connection board located in the turbine control panel. It receives the low-voltage temperature signals from the $\text{RTD}$s (Resistance Temperature Detectors) and routes them to the main analog processing card.
- Signals Handled: 3-wire $\text{RTD}$ inputs (temperature measurement).
- Total Capacity: It can handle up to 30 $\text{RTD}$ inputs.
System Interface
The $\text{TBCA}$ board does not perform signal conditioning itself; it connects to the Common Analog $\text{I/O}$ Board (TCCA), which digitizes and processes the signals.
- Location: Typically installed in the R5 core of the Mark V control panel cabinet.
- Connections to TCCA:
- JCC Connector: Carries $\text{RTD}$ signals 1 through 15 to the $\text{TCCA}$ board.
- JDD Connector: Carries $\text{RTD}$ signals 16 through 30 to the $\text{TCCA}$ board.
Hardware Details
- Terminal Blocks: The board features 1$\text{two}$ blocks of terminals to connect the field-wiring 2$\text{RTD}$ sensor cables.3
- Configuration: Like its $\text{DS200TBCAG2A}$ predecessor, the $\text{AAB}$ version of this terminal board does not include any user-configurable hardware jumpers. All configuration and scaling for the $\text{RTD}$ signals are handled in the software of the $\text{Mark V}$ system.
Part Number Breakdown
The full part number, $\text{DS200TBCAG2AAB}$, breaks down as follows, with the final letters indicating specific revision levels:
- DS200: Identifies the product as part of the $\text{Mark V}$ Speedtronic series.
- TBCA: The functional acronym for the $\text{RTD}$ Termination Board.
- G2: Indicates the second hardware grouping or design generation.
- AAB: Denotes the revision levels: the initial functional revision ($\text{A}$), a secondary functional revision ($\text{A}$), and the artwork/layout revision ($\text{B}$). These revisions typically involve minor component or manufacturing changes without altering the board’s core function.
