Product Overview
The GE IS200VTCCH1C is a Thermocouple Input Board designed for the Mark VI Speedtronic turbine control system. This industrial automation module accepts 24 thermocouple inputs, supporting types E, J, K, S, and T, and is built to meet the rigorous demands of gas and steam turbine management.
As part of the Mark VI series, the IS200VTCCH1C integrates seamlessly with the Central Control Module and Operator Interface, providing reliable temperature sensing for critical turbine operations. Its 16-bit A/D converter ensures precise measurement, while the conformal coating protects the PCB in harsh environments.
Technical Specifications
| Parameter |
Value |
| Part Number |
IS200VTCCH1C |
| Manufacturer |
General Electric (GE) |
| Series |
Mark VI Speedtronic |
| Functional Acronym |
VTCC |
| Functional Description |
Thermocouple Input Board |
| PCB Coating |
Conformal Coating |
| Thermocouple Channels |
24 |
| Supported Thermocouple Types |
E, J, K, S, T |
| mV Input Range |
−8 mV to +45 mV |
| A/D Converter Resolution |
16-bit |
| Cold Junction Accuracy |
±2°F |
| Max Field Cable Length |
300 m (984 ft) |
Key Features & Benefits
-
High Channel Density: 24 thermocouple inputs reduce the need for multiple boards, saving rack space and cost.
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Precision Measurement: 16-bit A/D conversion delivers higher resolution than 14-bit converters found in other Mark VI boards, improving temperature accuracy.
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Robust Cold Junction Compensation: Dual reference sensors with ±2°F accuracy ensure stable readings across ambient temperature changes.
-
Flexible Architecture: Supports both Simplex and Triple Modular Redundant (TMR) configurations, adapting to various safety and reliability requirements.
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Built-in Diagnostics: Front-panel LEDs (RUN green, FAIL red, STATUS orange) provide immediate status indication.
Compatible Systems & Integration
The IS200VTCCH1C is engineered for the GE Mark VI Speedtronic control platform, widely used in gas and steam turbine management. It connects to TBTC and DTTC terminal boards via J3 and J4 latching connectors on the VME rack. The board supports both local and remote cold-junction references, enabling flexible installation layouts. For TMR systems, the board provides six cold-junction reference channels, enhancing redundancy for critical applications.
Installation & Setup
Before installation, power down the VME processor rack. Insert the IS200VTCCH1C board and press the top and bottom levers to fully seat the edge connectors. Tighten the captive screws at the top and bottom of the front panel to secure the board. Connect the TBTC terminal board cables to the lower J3 and J4 connectors, ensuring they latch firmly. After installation, power up the rack and verify the front-panel LEDs for normal operation.
The board supports grounded and ungrounded thermocouple inputs, with a maximum two-wire cable resistance of 450 Ω. Keep the distance from the turbine control cabinet within 300 m (984 ft) to maintain signal integrity.
Maintenance & Reliability
Routine inspection of the IS200VTCCH1C should focus on the front-panel LEDs and connector integrity. Periodically check that all cables are securely latched and that no debris or moisture accumulates on the conformal-coated PCB. The board's conformal coating offers protection against dust and humidity, but regular visual checks help prevent issues. Replacing the board is straightforward: power down, swap the module, and power up—minimizing downtime for your turbine control system.
Selection Guide
When selecting a replacement or spare, verify that your system requires the IS200VTCCH1C revision (C) and that your terminal board matches (TBTCH1C for Simplex, TBTCH1B for TMR). If you need support for B, N, or R thermocouples, or mV ranges beyond −8 to +45 mV, consider the VTCCH2 board instead. For a reliable source of genuine GE automation parts, choose PLC Source PRO—your trusted partner for industrial control spares.