IS200TBQAH2A - Thermocouple Termination Module

SPECIFICATIONS:

Part Number: IS200TBQAH2A
Manufacturer: General Electric
Series: Mark VI
Product Type: Thermocouple Termination Module
Physical Location: R1 Core and R5 Core
Thermocouple Input Capacity R1 TBQA: 45 inputs
Number of inputs: 12
Number of outputs: 125 V dc
Signal Output Boards: R1, R2, R3 cores
Signal Distribution: 1–15 signals
Power supply voltage: 125 V DC
Connectors: JAR, JAS, JAT
MPU Pulse Rate Range: 2 Hz to 20 kHz
Mounting Type: DIN-rail
Common Mode Voltage Range: ±5 V
Dimensions: 17.8 cm wide x 33.02 cm
Operating Temperature: 30 to 65°C
Repair: 3-7 days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6153

FUNCTIONAL DESCRIPTION:

IS200TBQAH2A is a Thermocouple Termination Module manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. The Thermocouple Termination Module TBQA is located in the R1 and R5 cores. The TBQA terminal board can receive 45 thermocouple input signals. The TBQA in R1 distributes its input signals as follows: 15 signals (thermocouples #1 through #15) to TCQA in R1, 15 signals (thermocouples #16 through #30) to TCQA in R2 core, and 15 signals (thermocouples #31 through #45) to TCQA in R3. The TBQA board in R5 can receive 42 thermocouple input signals, which are all connected to the TCCA board in R5. The TBQA board also provides the cold junction compensation circuits.

TBQAH2A CONNECTIONS:

• JAR – From the R1 core, writes thermocouple signals #1 through #15 and cold junction signal to the TCQA board in the R1 core. From the R5 core, writes the thermocouple signals #1 through #15 and the cold junction signal to the TCCA board in the R5 core.

• JAS – From the R1 core, writes thermocouple signals #16 through #30 and cold junction signal to the TCQA board in the R2 core. From the R5 core, writes the thermocouple signals #16 through #30 and the cold junction signal to the TCCA board in the R5 core.

• JAT – From the R1 core, writes thermocouple signals #31 through #45 and cold junction signal to the TCQA board in the R3 core. From the R5 core, writes the thermocouple signals #31 through #42 and the cold junction signal to the TCCA board in the R5 core.

THERMOCOUPLE TERMINATION MODULE HARDWARE CONFIGURATION:

The Thermocouple Termination Module (TBQA) is a specialized terminal board used in turbine control systems, such as the GE Mark VIe system. It is designed to interface directly with multiple thermocouple sensors, which provide temperature data crucial for turbine operation and protection. The TBQA serves several key functions:

• Termination of thermocouple signals.
• Distribution of these signals to the appropriate processing boards (TCQA and TCCA).
• Provision of cold junction compensation circuits, ensuring accurate temperature measurements by correcting for temperature variations at the thermocouple terminals.

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FREQUENTLY ASKED QUESTIONS:

How many thermocouples can be connected to a TBQA module?

The TBQA module in the R1 core can receive and route up to 45 individual thermocouple input signals. In contrast, the TBQA in the R5 core is capable of receiving up to 42 thermocouple inputs. These thermocouples are connected via terminal blocks on the TBQA board and are routed to the processing boards through flat ribbon cables.

Which processing boards receive signals from the TBQA module?

Thermocouple signals received by the TBQA module are routed to TCQA boards located in the R1, R2, and R3 cores or to the TCCA board located in the R5 core. The routing is determined by the position and configuration of the TBQA. The connections to these boards are made using designated connectors labeled JAR, JAS, and JAT on the TBQA module.

How are the thermocouple signals routed from the TBQA in R5?

In the R5 core, the TBQA board routes all its thermocouple signals directly to the TCCA board, which is also located in the R5 core. Thermocouples numbered 1 through 15 are connected through the JAR connector, thermocouples 16 through 30 through the JAS connector, and thermocouples 31 through 42 through the JAT connector.