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SPECIFICATIONS:
Part Number: IS200VTCCH1B
Manufacturer: General Electric
Series: Mark VI
Product Type: Thermocouple Processor Board
Thermocouple types: E, J, K, S, T thermocouples
Number of channels: 24 channels
Number of Outputs: 2
Frequency: 3.2 ±0.2 kHz
Span: -8 mV to +45 mV
Power supply current: 5 A dc
Mounting: DIN-rail mounting
Technology: Surface mount
Measurement accuracy: 53 mV
Maximum Distance: 300 m
Operating temperature: -30° to 65°C
Size: 33.02 cm high x 17.8 cm wide
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721G
FUNCTIONAL DESCRIPTION:
IS200VTCCH1B is a Thermocouple Processor Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. The VTCC thermocouple processor board is designed to accept up to 24 thermocouple inputs of types E, J, K, S, and T, providing flexible monitoring options for a wide range of temperature measurement applications. These thermocouple inputs are wired to two terminal blocks located on the TBTC terminal board. From there, cables with molded plugs connect the TBTC terminal board directly to the VME rack, where the VTCC board is installed, ensuring secure and reliable signal transmission. The TBTC terminal board supports different control configurations depending on system requirements: it can operate in a simplex configuration using the TBTCH1C module, or in a triple module redundant (TMR) configuration using the TBTCH1B module, offering enhanced reliability and fault tolerance for critical systems. Once the thermocouple signals are processed by the VTCC board, the input data is transferred over the VME backplane to the VCMI module, which then relays the information to the main controller for monitoring, analysis, and control operations, completing the data acquisition and processing chain.
INSTALLATION:
To install the VTCC board, first ensure that the VME processor rack is completely powered down and disconnected from any power sources to prevent damage or electrical hazards. Carefully remove the VTCC board from its anti-static packaging and handle it by its edges, avoiding contact with any components or connectors. Align the board with the designated slot in the VME rack and gently slide it in, making sure the edge connectors properly engage with the backplane connectors. Once properly aligned, push the top and bottom levers inward to fully seat the board. After seating, secure the board by tightening the captive screws located at the top and bottom of the front panel, ensuring it is firmly fastened and properly grounded. Finally, perform a visual check to confirm correct installation, reconnect power, and power up the system, verifying that the VTCC board is recognized and functioning correctly without any error indicators.
OPERATION:
The TBTC terminal board is capable of accommodating 24 thermocouple inputs, which may be either grounded or ungrounded depending on system requirements. These thermocouple inputs can be located at distances of up to 300 meters (984 feet) from the turbine control cabinet, provided that the total two-way cable resistance does not exceed 450 ohms, ensuring signal integrity over long cable runs. To maintain accurate measurements in electrically noisy environments, the terminal board is equipped with high-frequency noise suppression components that minimize interference.
Additionally, two cold junction reference devices are installed on the TBTC board to provide accurate compensation for temperature variations at the connection points. Once the thermocouple signals are received by the VTCC thermocouple processor board, software-based linearization is applied to each input according to its specific thermocouple type, ensuring precise and standardized temperature readings. If the VTCC detects that a thermocouple is operating outside of its defined hardware limits, that input is automatically removed from the scanning sequence to prevent it from adversely affecting the measurements of other channels, thereby maintaining the reliability and accuracy of the entire thermocouple monitoring system.
COLD JUNCTIONS:
The VTCCH1B thermocouple processor board utilizes two cold junction reference devices to ensure accurate temperature measurements. If both cold junction devices are operating within the configurable limits, the system calculates the average of their readings and uses this value for cold junction compensation. If only one of the cold junction devices falls within the acceptable limits, the system uses the reading from that device alone for compensation purposes. In the event that neither cold junction device is within the configurable limits, a default value is applied to maintain system operation, ensuring that temperature calculations continue even in the absence of valid cold junction readings. This approach provides robust and reliable compensation while protecting the integrity of thermocouple measurements under varying conditions.
WOC is proud to offer the largest stock of OEM replacement parts for GE Speedtronic Gas Turbine Control Systems, ensuring you have access to the critical components you need for maintenance, upgrades, or replacements. In addition to supplying genuine parts, we specialize in repairing faulty boards and providing unused and professionally rebuilt boards, all supported by a reliable warranty to guarantee performance and peace of mind. Our team of experts is available round the clock to offer technical guidance and solutions tailored to your automation and control system requirements. Committed to maximizing uptime and operational efficiency, we are always ready to assist with any OEM needs, from parts procurement to repairs. For pricing, availability, or support, please contact our team via phone or email at WOC. Your automation challenges are our top priority, and we are dedicated to delivering fast, reliable, and expert solutions.
What is the IS200VTCCH1B?
The IS200VTCCH1B is a thermocouple input terminal module used in turbine or industrial control systems. It connects thermocouples to the VME-based VTCC system for temperature monitoring.
What type of configuration does it support?
It supports a Triple Module Redundant (TMR) configuration, providing enhanced reliability and fault tolerance. This ensures continuous operation even if one module fails.
How does it connect to the VTCC system?
The module connects to the TBTC terminal board, which then interfaces with the VTCC board in the VME rack. Data is transmitted via the VME backplane to the controller through the VCMI.
How many thermocouples can it handle?
It works with 24 thermocouple inputs, compatible with types E, J, K, S, and T. The inputs can be either grounded or ungrounded.
