DS200TCCAG2B - Common Analog I/O Board

SPECIFICATIONS:

Part Number: DS200TCCAG2B
Manufacturer: General Electric
Series: Mark V
Location in System: R5 Core
Key Connectors: 2PL, 3PL
Hardware Jumpers J1: RS232 serial port
Product Type: Common Analog I/O Board
Signal Types: 4-20 mA
Signal Types Supported: 4-20 mA Input/Output
Country/Region of Manufacture: United States
Availability: In Stock
Manual: GEH-6153

FUNCTIONAL DESCRIPTION:

DS200TCCAG2B is a Common Analog I/O Board manufactured by General Electric as part of the Mark V Series used in gas turbine control management systems. The Common Analog I/O Board (TCCA), which is situated there, receives analog signals from the CTBA, TBQA, and TBCA terminal boards installed in the R5 core. Some of the signals in this group are 420 mA inputs and outputs, RTD inputs, thermocouple inputs, shaft voltage inputs, and shaft current inputs. The signals are written to the STCA board through the 3PL connector.

TCCA CONNECTORS:

• 2PL - The R5 core receives power from the TCPS board.
• 3PL - The TCCA, STCA, and core 5 TCCB boards are connected by a data bus. Conditional signals are carried on 3PL for transfer to the COREBUS.
• JAA - Contains the 4-20 mA output signals for the CTBA terminal board..
• JBB - Contains input signals from the CTBA terminal board, including the 4-20 mA input signals and shaft voltage and current signals.
• JCC - RTD input signals from the TBCA terminal board are present.
• JDD - Possesses RTD input signals from the TBCA terminal board.
• JAR/S/T - Contains cold junction inputs from the TBQA terminal board and thermocouple input signals.
• JC - Power supply diagnostic signals from TCPS are present.

CONFIGURATION:

• Hardware: The TCCA board has three hardware jumpers, designated J1, JP2, and JP3. Using J1, the serial RS232 port can be turned on or off. Using JP2, the oscillator is disabled for card testing. JP3 is used for testing in manufacturing.

• Software: The I/O configuration constants for the thermocouples, RTDs, mA inputs and outputs, and the values for the shaft voltage and current, are entered in the I/O Configuration Editor, which is found on the HMI.

TCCA 4 - 20 mA Input Circuit:

The TCCA board provides the circuitry for the 420 mA input signals. The signals from the CTBA terminal board are read using the JBB connector. The TCCA board measures the voltage drop across the burden resistor caused by the transducer current and writes the results to the I/O Engine through the 3PL connector.

TCCA 4-20 mA Output Circuit:

The TCCA board's circuitry sends 420 mA outputs through the JAA connector to the CTBA terminal board. These transmissions are typically used to power distant monitoring devices.

TCCA RTD CIRCUIT:

The circuitry for the TBCA terminal board, which stimulates the RTDs, is located on the TCCA board. A steady current is fed into the RTD, and when the temperature changes, the resistance shifts, changing the voltage on the RTD. The TCCA board calibrates, measures, and scales the voltage signal. The TCCA board reads the RTD signals from the TBCA terminal board via the JCC and JDD connectors. The signals from the TCCA board are sent to the I/O Engine using the 3PL connector. Constants in the I/O configuration are used to choose the RTD type.

THERMOCOUPLE CIRCUIT:

The thermocouple inputs are read by the TBQA terminal board. The TBQA terminal board's cold junction circuitry generates the cold junction signals. These variables are used by the TCCA board to calculate the cold junction correction. The TCCA board uses the thermocouple input and compensation value to calculate the actual temperature that the thermocouple reads. The I/O Engine reads the value through the 3PL connector. The types and curves of thermocouples are chosen based on the I/O configuration constants.

SHAFT MONITORING:

The TCCA board controls the voltage and current monitoring for the turbine shaft. Signals are read from the CTBA terminal board through the JBB connector and written to the I/O Engine using the 3PL connection. The R5 core location 2 houses the TCCA board. The Turbine Control R5> Micro Application Board A is what it is called. The following operations are defined by the TCCA configuration:

• RTD inputs and thermocouple inputs
• Inputs in milliamps
• Monitoring shaft voltage and current

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FREQUENTLY ASKED QUESTIONS:

What is the Common Analog I/O Board?

The Common Analog I/O Board is a crucial component in turbine control systems, responsible for processing various analog signals such as 4-20 mA inputs/outputs, RTD and thermocouple inputs, and shaft voltage/current signals.

How does the board communicate with other components?

Communication between the Common Analog I/O Board and other components of the turbine control system is achieved through connectors that allow for data transfer and system integration. These connectors link the board to other parts of the system, such as the I/O engine and other terminal boards, ensuring seamless data exchange.

What is the purpose of the jumpers on the board?

The Common Analog I/O Board features several jumpers that serve different purposes for system configuration and testing. Jumper 1 (J1) controls the activation of the RS232 serial port, allowing it to be turned on or off as needed.