The GE DS200TCQAG1A, also cataloged as the DS200TCQA Analog I/O Board, operates as a dedicated hardware component for signal conditioning, scaling, and processing of analog field I/O within GE Mark V turbine control panels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | DS200TCQAG1A |
| Brand | General Electric |
| Origin | USA |
| Series | Mark V |
| Functional Acronym | TCQA |
| Revision Group | Group 1, Revision A (G1A) |
| Core Placement | Triple redundant I/O cores (R1, R2, R3) |
| Interface Signals | Thermocouple, LVDT/LVDR, 4-20 mA I/O, servo valve outputs, vibration inputs, pulse inputs, voltage inputs, relay drive outputs |
| Total Hardware Connectors | 8 |
| Interface Connectors | JG, JF, JE, JD, JB, JA, 2PL, 3PL |
| Interfacing Terminal Boards | TBQA, TBQC (via JFR connector), TVQA (CJC reference), TCQC (via JE connector) |
| Protective Coating | Normal Coating |
| Manual Reference | GEH-6353 / GEH-6153 |
| Operating Temp | 0 to 60 deg C |
| Dimensions | Standard GE Mark V Board Size |
| Weight | Standard GE Mark V Board Weight |
| Power Consumption | Backplane bus powered |
I/O Density Scaling & Cold Junction Compensation
The DS200TCQAG1A expands I/O density scaling across the R1, R2, and R3 cores by processing low-level analog telemetry and high-density control signals. Field inputs such as 4-20 mA compressor stall-detect and fuel flow pressure loops are scaled directly onboard. Temperature telemetry loops interface via the TBQA terminal board, while cold junction compensation (CJC) is executed using reference signals routed from the TVQA terminal board. Generator and line synchronization feedback signals are multiplexed directly to the TCQC board over the JE connector interface, while LVDT positioning data is routed through the JF header.
Frequently Asked Questions
Q: How is cold junction compensation calculated on the DS200TCQAG1A?
A: Thermocouple field wires terminate at the TBQA board, while cold junction reference voltages are generated at the TVQA board and transmitted to the DS200TCQAG1A for software compensation calculations.
Q: Which connector routes LVDT and LVDR position feedback into the DS200TCQAG1A?
A: LVDT/LVDR feedback signals pass from the TBQC terminal board JFR header directly into the JF connector on the DS200TCQAG1A.
Q: Can the DS200TCQAG1A operate in a non-redundant core configuration?
A: The board is designed to interface within the R1, R2, or R3 cores, supporting both single-core and triple modular redundant (TMR) architecture topologies.
Field Installation Guidelines
- Remove total system power and isolate all external 4-20 mA loop supplies before extracting or inserting the board into the core chassis.
- Wear a grounded static-dissipative wrist strap attached to the metal rack enclosure frame during handling.
- Verify pin alignment on all eight ribbon connectors (JG, JF, JE, JD, JB, JA, 2PL, 3PL) prior to fully seating the headers to prevent pin deformation.
- Inspect the physical board surface to ensure the factory normal coating layer is undamaged and free from conductive metallic dust before applying power.
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Guide
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