SPECIFICATIONS
Part No.: IS230TBTCH3B
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Temperature Operating: 0 to 60 oC
Product Type: Thermocouple Terminal Board
Availability: In Stock
Series: Mark VIe
Functional Description
IS230TBTCH3B is a Thermocouple Terminal Board developed by GE. It is a part of Mark VIe series. The terminal board is specifically engineered to handle thermocouple inputs. Accurate temperature data is essential for safe and efficient turbine operation, and this terminal board facilitates precise, organized input wiring from thermocouples to the control system.
Features and Capabilities
- Multi-Type Thermocouple Compatibility: The board can accept 24 thermocouple inputs, supporting a variety of common thermocouple types including Type E, J, K, S, and T. This versatility allows it to be used in diverse applications with different temperature measurement requirements.
- Barrier-Type Terminal Blocks: Thermocouple inputs are wired to two barrier-type terminal blocks mounted on the terminal board. Barrier blocks provide physical separation and insulation between individual thermocouple circuits to prevent electrical interference and ensure signal integrity.
- Communication Interface: The board interfaces with the I/O processor through DC-type connectors, enabling reliable and efficient communication between the thermocouple signals and the Mark VIe control system. This design supports streamlined data acquisition and processing within the system.
- Robust and Modular Design: Built to integrate seamlessly within the Mark VIe modular architecture, it supports easy installation, maintenance, and scalability.
Installation
The installation of thermocouples and their connection to the terminal board is designed to be straightforward, secure, and service-friendly to support reliable temperature measurement in turbine control systems.
Wiring and Terminal Blocks
- Thermocouple sensors are wired directly to the terminal board via two removable I/O terminal blocks. These terminal blocks serve as the primary interface between the field wiring and the control system’s internal circuitry.
- Each terminal block contains 24 individual terminals, which can accommodate wires up to #12 AWG size. This supports a wide range of wiring configurations and ensures compatibility with standard thermocouple cables.
- The terminal blocks are mounted on the board and are securely fastened with two screws to ensure stable electrical and mechanical connections while allowing for easy removal during maintenance or troubleshooting.
Shielding and Grounding
- To minimize electrical noise and interference, a shield terminal strip is installed adjacent to each terminal block. This strip is connected to the chassis ground, providing a common grounding point for thermocouple shield wires.
- Proper grounding of the shields is critical to maintain signal integrity, especially in electrically noisy industrial environments.
Communication and Cabling in Mark VI Systems
- In Mark VI systems, communication from the terminal board to the control system’s I/O processors is carried out using board-mounted J-type connectors.
- These J-type connectors are wired with cables that run directly to the I/O processors housed in the VME (Versa Module Europa) rack, which contains the control and processing hardware.
Mark VIe System Improvements
- The Mark VIe system introduces a modular approach with I/O packs that plug directly into the terminal board’s J-type connectors.
- This modular design enhances system flexibility, simplifies wiring, and reduces installation time.
- The number of cables or I/O packs used depends on the required redundancy level of the control system. For example, simplex systems require fewer connections, while dual or triple modular redundancy (TMR) systems require additional I/O packs and cabling to support fault-tolerant operation.
The WOC team is always available to help you with your Mark VIe requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS230TBTCH3B?
It is a Thermocouple Terminal Board developed by GE under the Mark VIe series.
What is the purpose of the shield terminal strip on the terminal board?
The shield terminal strip is connected to chassis ground and is used to properly ground thermocouple shield wires to reduce electrical noise and interference.
How does the Mark VI system connect the terminal board to the I/O processors?
In Mark VI systems, board-mounted J-type connectors are cabled directly to the I/O processors in the VME rack.
