IS200TBQAH2A - Thermocouple Termination Module

IS200TBQAH2A - Thermocouple Termination Module IS200TBQAH2A - Thermocouple Termination Module

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Part Number: IS200TBQAH2A
Manufacturer: General Electric
Series: Mark VI
Product Type: Thermocouple Termination Module
Availability: In Stock
Country of Manufacturer: United States

Functional Description

IS200TBQAH2A is a Thermocouple Termination Module developed by General Electrics. The thermocouple termination module is used to connect thermocouple sensors. Thermocouples are temperature sensors that work based on the principle of the Seebeck effect, which generates a voltage proportional to the temperature difference between two junctions of dissimilar metals. These sensors are commonly used in various industries and applications to measure temperature accurately.


  • Thermocouple Input Terminals: The module provides secure and reliable terminals or connectors to connect the thermocouple wires, ensuring a stable connection for accurate temperature measurement.
  • Sensor Connection: The module provides connectors or terminals to attach the thermocouple wires securely. This ensures a reliable connection and prevents any signal loss or interference.
  • Signal Conditioning: Thermocouples generate very small voltage signals, so the termination module may include signal conditioning circuitry. This circuitry amplifies and linearizes the thermocouple output to obtain an accurate temperature reading.
  • Isolation and Protection: In some applications, electrical isolation may be required to prevent ground loops and electrical noise interference. The module may incorporate isolation components to ensure a reliable and noise-free signal transmission. Additionally, it may include protection circuits to safeguard against voltage spikes or other external disturbances.
  • Communication Interface: The termination module often has an output interface to communicate with data acquisition systems, such as analog voltage outputs, digital outputs, or communication protocols like RS-232, RS-485, or Ethernet.


  • The 24 thermocouple inputs incorporated within this system offer a significant level of flexibility, allowing them to be configured as either grounded or ungrounded inputs. This adaptability ensures that the system can effectively cater to various operational requirements and scenarios.
  • The thermocouple inputs exhibit an impressive reach, capable of extending up to 300 meters (equivalent to 984 feet) from the turbine control panel. This extensive reach ensures that the sensors can be strategically positioned even in distant locations while maintaining robust signal integrity. Furthermore, this extended range is supported by a maximum two-way cable resistance of 450 , contributing to the system's ability to maintain accurate and reliable data transmission over longer distances.
  • To bolster the thermocouple input performance, the unit is equipped with sophisticated features. Notably, high-frequency noise suppression mechanisms are thoughtfully integrated to safeguard against potential noise interference. This proactive approach ensures that signal quality remains optimal, enhancing the accuracy and consistency of the measurements obtained from these inputs.
  • Within the unit, two cold junction reference devices are strategically positioned. These devices play a pivotal role in maintaining accurate temperature measurements by compensating for variations in the cold junction temperature. This design consideration enhances the overall precision and reliability of the system's temperature readings.
  • A crucial aspect of the system's data processing involves analog-to-digital conversion, which takes place within the I/O processor. This conversion process translates the analog signals from the thermocouple inputs into digital format, facilitating further data analysis and utilization. Additionally, the I/O processor incorporates specialized algorithms for linearization, ensuring that the data from the various thermocouple types is accurately transformed to correspond with the actual temperature values. This sophisticated processing contributes to the system's capability to provide highly accurate and interpretable temperature measurements.

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What is IS200TBQAH2A?
It is a Thermocouple Termination Module developed by General Electrics.

What is a thermocouple termination module?
A thermocouple termination module is a device used to interface and terminate thermocouple sensors. It provides the necessary connections and circuitry to ensure accurate temperature measurement and signal transmission.

How does a thermocouple termination module work?
The module connects to the thermocouple wires, amplifies the small voltage signals generated by the thermocouple, compensates for the cold junction temperature, and conditions the output for accurate temperature readings. It then communicates this data to a data acquisition system or controller.

Why is cold junction compensation important?
Cold junction compensation is essential because thermocouples measure temperature based on the voltage difference between two junctions, one at the measurement point and the other at the termination module. The module compensates for the temperature at its own cold junction, ensuring accurate temperature readings.