SPECIFICATIONS
Part No.: IS200TBCIH1CAA
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 33.02 cm high x 10.16 cm wide
Temperature rating: 0 to 60 oC
Current suppression: MOVs
Product Type: Contact Input Terminal Board
Availability: In Stock
Series: Mark VI
Functional Description
IS200TBCIH1CAA is a Contact Input Terminal Board developed by GE. It is a part of Mark VI control system. It serves as an interface for 24 dry contact inputs, organized across two barrier-type terminal blocks. These inputs are integrated into the system for various control and monitoring purposes. It requires a nominal 125 V dc excitation voltage, floating within a range of 100 to 145 V dc. This voltage is supplied for contact excitation and operation. To ensure reliable functionality, the contact inputs are equipped with noise suppression circuitry. These circuits mitigate high-frequency noise and suppress surges, safeguarding against potential disruptions in the input signals.
Signal Processing and Isolation
- Signal Processing: The discrete input voltage signals are directed to the I/O processor for further handling and processing.
- Optical Isolation: Optical isolators embedded within the system provide group isolation, ensuring electrical separation between circuits and effectively transferring the processed signals to the system controller.
Threshold Setting and Voltage Tracking
- The isolation circuits within TBCI employ a reference voltage to establish a transition threshold equivalent to 50 percent of the applied floating power supply voltage. This setting is vital for signal recognition and transition determination.
- Voltage Tracking: To maintain functionality, the tracking mechanism is clamped to not fall below 13% of the nominal rated supply voltage. This action forces all contacts to indicate an open state when voltage dips below this threshold.
Features
- Input Handling Excellence: It stands out with its remarkable input handling capabilities, accommodating 24 dry contact inputs organized across two barrier-type terminal blocks. This design provides a structured and efficient approach to input integration.
- Excitation Voltage Flexibility: With a nominal 125 V dc excitation voltage, the board offers a floating range that allows for versatile contact excitation. This feature enhances adaptability, ensuring optimal performance across various operational scenarios.
- Robust Noise Suppression: Equipped with advanced noise suppression circuitry, this device counters high-frequency noise and surges effectively. The inclusion of this feature significantly contributes to signal reliability, ensuring that the system operates smoothly even in environments with potential electromagnetic interference.
- Power Supply: It comes in different versions, each tailored to specific voltage specifications based on unique operational requirements. This variant flexibility allows for seamless integration into diverse systems with varying power supply needs.
- Signal Processing and Isolation: The device excels in signal processing and isolation, managing and transferring processed signals through optical isolators. This ensures not only group isolation for enhanced safety but also reliable communication with the system controller. This feature is critical for maintaining signal integrity and preventing cross-channel interference.
- Threshold Setting and Voltage Tracking: Utilizing a reference voltage, the component allows users to set precise transition thresholds. Moreover, its voltage tracking functionality ensures the continuous monitoring and adjustment of voltage levels, contributing to sustained signal integrity and reliability over time.
- Crucial Role in System Integration: This device plays a pivotal role in handling dry contact inputs within a control system. Its ability to maintain signal integrity through precise voltage control, noise suppression, and reliable signal processing makes it an indispensable component for effective integration into sophisticated control systems.
Operation
- The system's operation is designed with a meticulous focus on signal integrity and reliability. Filters are strategically integrated to reduce high-frequency noise and suppress surges near the signal entry points, ensuring that the incoming signals remain clear and stable. This initial processing stage lays the foundation for accurate signal interpretation throughout the system's operation.
- Powering the dry contact inputs on H1 is facilitated by a floating 125 V dc supply sourced from the turbine control unit. This voltage range, spanning from 100 V dc to 145 V dc, provides ample power for the inputs to function effectively. Prior to reaching each contact input, the 125 V dc bus undergoes current limiting within the power distribution module, guaranteeing consistent and regulated power distribution to the inputs, thus enhancing their operational reliability.
- Flexibility is built into the system to accommodate variations in voltage requirements across different versions (H2 and H3), as outlined in the specification table. This adaptability ensures seamless integration with diverse system configurations while maintaining compatibility with various power sources, enhancing the system's versatility and applicability across different environments.
- Discrete input voltage signals, having undergone initial processing and power supply conditioning, are directed to the Input/Output (I/O) processor. This pivotal component acts as a central hub for managing input and output operations within the system. The I/O processor facilitates further processing of these signals and prepares them for transmission to the system controller, ensuring efficient signal handling and management.
- Signal transmission from the I/O processor to the system controller is facilitated through optical isolators. These isolators play a crucial role in providing group isolation, effectively isolating different sections of the system to prevent potential issues such as ground loops or noise interference from compromising signal integrity. This robust isolation mechanism ensures reliable signal transfer and contributes to the overall stability and performance of the system.
The WOC team is always available to help you with your Mark VI requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200TBCIH1CAA?
It is a contact input terminal board developed by GE under the Mark VI series.
How does TBCI protect incoming signals from noise and surge?
Filters strategically placed near the entry point of each input effectively reduce high-frequency noise and suppress surge, ensuring reliable signal integrity within the system.
How are input signals managed and isolated within the system?
The processed discrete input voltage signals travel to the I/O processor before passing through optical isolators. These isolators ensure group isolation and facilitate the transfer of processed signals to the system controller for further handling and analysis.
What role does the reference voltage play in TBCI's isolation circuits?
The reference voltage determines a transition threshold at 50 percent of the floating power supply voltage. Additionally, a clamping mechanism maintains a minimum voltage level, ensuring all contacts indicate an open state if the voltage dips below this threshold.
