DS200TCCAG1AGA - Common Analog I/O Board

SPECIFICATIONS

Part Number: DS200TCCAG1AGA
Manufacturer: General Electric
Country of Manufacture: United States (USA)
Series: Mark V
Function: Common Analog I/O Board

Functional Description

DS200TCCAG1AGA is a common analog I/O board developed by GE. It is part of the GE Speedtronic Mark V control system.  Its primary role is to scale and condition a wide variety of analog signals, which are sourced from several terminal boards such as the CTBA, TBQA, and TBCA. These signals include 4-20 mA inputs and outputs, RTD inputs, thermocouple inputs, shaft voltage inputs, and shaft current inputs. Once conditioned, these signals are transferred to the STCA board via the 3PL connector, allowing them to be integrated into the broader control system.

Connectors

• 2PL: This connector distributes power from the TCPS board in the R5 core to the TCCA board.
• 3PL: Acts as the data bus connecting the STCA, TCCA, and TCCB boards in the R5 core. Conditioned signals are transmitted through this connector to the COREBUS.
• JAA: Carries 4-20 mA output signals to the CTBA terminal board.
• JBB: Handles shaft voltage and current signals along with 4-20 mA input signals from the CTBA terminal board.
• JCC/JDD: These connectors carry RTD input signals from the TBCA terminal board.
• JAR/S/T: Used to carry thermocouple input signals and cold junction inputs from the TBQA terminal board.
• JC: This connector carries power supply diagnostic signals from the TCPS.
• JEE: This connector is typically not used in most applications.

Hardware Configuration

• J1: This jumper is used to enable or disable the serial RS232 port for communication.
• JP2: This jumper is used to disable the oscillator when performing card tests.
• JP3: This jumper is specifically for factory testing.

Software Configuration

On the software side, I/O configuration constants are required for configuring the system's various analog inputs and outputs. These constants are entered via the I/O Configuration Editor found on the Human-Machine Interface (HMI). Here, settings for thermocouples, RTDs, mA inputs and outputs, and shaft voltage and current can be adjusted according to the operational needs.

4-20 mA Input Circuit

The board provides the necessary circuitry to handle 4-20 mA input signals. These signals are sourced from the CTBA terminal board through the JBB connector. The transducer current is passed through a burden resistor, creating a voltage drop that is then read by the board. The voltage information is sent to the I/O Engine through the 3PL connector. This enables the system to monitor the input signals for further processing.

4-20 mA Output Circuit

Similarly, the board also supports the 4-20 mA output circuitry. These output signals are typically used to drive remote instrumentation for monitoring purposes. The JAA connector carries these 4-20 mA output signals to the CTBA terminal board. This functionality is crucial for transmitting analog signals from the control system to external devices, such as sensors or monitoring systems.

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FREQUENTLY ASKED QUESTIONS

What is DS200TCCAG1AGA?
It is a common analog I/O board and is part of the GE Speedtronic Mark V gas turbine control system.

What is the function of the JBB connector in the monitoring process?
The JBB connector is used to carry shaft voltage and current signals, along with 4–20 mA input signals, from the terminal board to the TCCA. It is essential for transmitting these signals accurately for processing.

What is the role of the 3PL connector in shaft monitoring?
The 3PL connector is responsible for transmitting the conditioned signals from the TCCA board to the I/O Engine. It ensures that the processed shaft voltage and current data are integrated into the control system for monitoring and analysis.

How does the board contribute to the overall turbine control system?
The board contributes by providing critical data on shaft voltage and current, enabling real-time monitoring and analysis. This information is crucial for maintaining turbine health, preventing potential issues, and ensuring safe and efficient operation.