SPECIFICATIONS
Part No.: DS200TCQAG1ADC
Manufacturer: General Electric
Series: Mark V
Product type: Analog IO Board
Repair: 3-5 Days
Availability: In Stock
Country of Manufacture: United States (USA)
Functional Description
DS200TCQAG1ADC is an analog IO board developed by GE. It is a part of Mark V control system. The Analog IO Board is designed to scale and condition multiple analog signals collected from terminal boards mounted on the I/O cores R1, R2, and R3. These signals include inputs and outputs for Linear Variable Differential Transformers (LVDTs), servo valves, thermocouples, 4-20 mA signals, vibrations, relay drivers, pulse inputs, voltage inputs, and generator and line feedback signals. Some signals are directed to the STCA board via the 3PL connector, while generator and line signals interact with the TCQC board via the JE connector. Specific signals like fuel flow pressure and compressor stall-detection inputs are also processed on the board.
Connectors
- 2PL: Distributes power from the TCPS board to cores R1, R2, and R3.
- 3PL: Acts as the Data Bus between STCA and TCQA boards in cores R2 and R3, and between STCA, TCQA, and TCQE boards in core R1. It carries conditioned signals for transfer to the COREBUS.
- JA: Handles thermocouple inputs and cold junction compensation from the TBQA board for cores R1, R2, and R3.
- JB: Manages 4-20 mA input and output signals between the TCQA board and the TBQC terminal board.
- JD: Carries trip signals to the TCTG board in core P1 from core R1; it is not utilized in cores R2 or R3.
- JE: Facilitates the transfer of servo valve outputs, relay driver outputs, generator and line signals, and pulse signals between the TCQA and TCQC boards. It also carries power supply monitor inputs.
- JF: Transmits LVDT/LVDR position inputs from the TBQC terminal board.
- JG: Transfers vibration inputs from the TBQB terminal board and manages ±10 V DC inputs.
Configuration
- Hardware Configuration:
- Jumpers J1 and J2 configure mA output circuits.
- J5 and J6 set the mA output current range (20 mA or 200 mA maximum).
- J7 enables the RS232 port for card testing.
- J8 activates an oscillator.
- Software Configuration: I/O configuration constants for thermocouples, pulse rates, vibrations, LVDT positions, and 4-20 mA signals are input through the I/O Configuration Editor on the operator interface.
Features
- Pulse Rate Input Circuit: The board scales and conditions pulse rate inputs received via the JE connector from the TCQC board. These signals originate from TTL (Transistor-to-Transistor Logic) and magnetic pickup inputs connected to the QTBA and PTBA terminal boards. Core R1 processes high-pressure shaft speed inputs, while cores R2 and R3 handle other signals as needed.
- 4-20 mA Input Circuits: The board processes 4-20 mA and 0.1 mA signals received via the JB connector from the TBQC terminal board. The transducer current is converted into a voltage drop across a burden resistor, which is then read by the TCQA board and transmitted to the I/O Engine via the 3PL connector. Jumpers on the TBQC terminal board adjust the input current range.
- 4-20 mA Output Circuit: The TCA board drives 4-20 mA output signals to the TBQC terminal board through the JB connector. These signals are typically utilized for controlling external devices.
- Thermocouple Circuit: Thermocouples are connected to the TBQA terminal board, which also provides the cold junction reference required for compensation. The TCQA board calculates the actual temperature using the thermocouple inputs and cold junction compensation values. Configurations such as thermocouple types and curves are set via the I/O Configuration Editor.
- LVDT/R Circuit: Linear Variable Differential Transformers (LVDTs) and Linear Variable Differential Reactors (LVDRs) measure actuator positions. Signals are received via the JF connector from the TBQC terminal board, scaled, and conditioned by the board, and then used by the Control Sequence Program (CSP). Excitation signals are sent to the QTBA terminal board via the TCQC board, enabling precise servo valve regulation.
- Seismic Vibration Circuit: Seismic vibration sensors are terminated at the TBQB terminal board for cores R2 and R3 and read by the TCQA board in cores R1 and R3. The signals are scaled and conditioned for use by the Control Engine to monitor and protect the system. Scaling values are configured via the I/O Configuration Editor.
- Generator and Line Circuit: In core R1, generator and line feedback signals are routed through the TCTG board to the TCQC board via the board's JD and JE connectors. These signals are essential for monitoring and control in turbine systems.
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Frequently Asked Questions
What is DS200TCQAG1ADC?
It is an analog IO board developed by GE.
How does the board handle thermocouple signals?
Thermocouples are connected to the TBQA terminal board, which provides cold junction compensation. The board calculates the actual temperature by using the input signals and compensation values. Configuration settings for thermocouple types and curves are managed via the I/O Configuration Editor.
What is the role of the board in processing pulse rate inputs?
The board conditions pulse rate inputs received from the TCQC board via the JE connector. These inputs originate from TTL and magnetic pickup signals connected through QTBA and PTBA terminal boards. They are crucial for monitoring shaft speeds and other signals.
What are LVDT and LVDR circuits, and how are they managed by the board?
LVDT (Linear Variable Differential Transformer) and LVDR (Linear Variable Differential Reactor) circuits detect actuator positions. Signals from these devices are read, scaled, and conditioned by the board before being utilized by the Control Sequence Program (CSP) for precise control.
How does the board process seismic vibration signals?
Seismic vibration sensors terminate at the TBQB terminal board. These signals are scaled, conditioned by the board, and sent to the Control Engine for system monitoring and protection.
What is the significance of hardware jumpers on the board?
Hardware jumpers allow customization of the board's functions, such as selecting mA output circuits, setting current ranges (20 mA or 200 mA), and enabling RS232 ports for card testing.
