1. Basic Information

• Model: IS230TNSVH3A

• Brand: GE (General Electric, now part of Emerson Automation Solutions)

• Product Type: Thermocouple Input Terminal Board

• System Compatibility: GE Speedtronic Mark VI / Mark VIe Gas & Steam Turbine Control Systems

• Processor Compatibility: Compatible with VTCC analog I/O processors, supports TMR (Triple Modular Redundancy) architecture, and adapts to VME rack I/O systems

• Core Position: Specifically designed for temperature monitoring of key turbine components, serving as the core interface board for temperature signal acquisition in Mark VI/VIe systems

2. Key Specifications

• Channel Configuration: 48 independent thermocouple input channels, divided into two front barrier terminal blocks (TB1 and TB2), 24 channels each, with independent channel isolation

• Supported Thermocouple Types: Four industrial standard thermocouples (Type E, J, K, T)

• Input Mode: Supports both grounded and ungrounded input methods, adapting to different on-site wiring requirements

• Operating Temperature: -30℃ ~ +65℃ (standard industrial working conditions); Storage Temperature: -40℃ ~ +85℃

• Protection Level: IP20, with industrial-grade EMC (Electromagnetic Compatibility), ESD (Electrostatic Discharge) protection, and anti-vibration design

• Physical Specifications: Compatible with Mark VI/VIe standard cabinets, front-terminal design, size suitable for rack mounting standards, weight approx. 0.8kg

• Certifications: Complies with CE, UL 61010-1 industrial safety standards, suitable for harsh operating environments in power plants

3. Core Functions

• Signal Acquisition: Accurately receives temperature signals from 48 thermocouples, realizing synchronous multi-point temperature acquisition of the turbine with high acquisition accuracy and fast response speed

• Signal Conditioning: Built-in high-frequency noise filtering and surge suppression circuits, effectively eliminating the impact of electromagnetic interference and voltage fluctuations in industrial sites on signals

• Electrical Isolation: Electrical isolation between channels and between channels and ground, preventing signal crosstalk and ensuring the stability and reliability of collected data

• Signal Transmission: Connects to VME rack I/O processors via on-board J-type multi-pin connectors (JRA/JRB, JSA/JSB, etc.), realizing real-time upload of temperature data to the control system

• Fault Diagnosis: Supports channel fault monitoring, and can realize fault location with ToolboxST software, facilitating on-site troubleshooting

4. Installation & Maintenance

• Mounting Method: Fixed with three-point screws, installed on the Mark VI/VIe system shielding rack; the PCB is surrounded by full metal shielding to further enhance anti-interference capability

• Wiring Design: Front-mounted TB1 and TB2 barrier-type terminal blocks, fixed with screws, supporting direct connection of thermocouple cables, with convenient and firm wiring

• Maintenance Features: Pluggable terminal blocks, facilitating on-site wiring, inspection, replacement, reducing maintenance costs and downtime

• Adaptability: Standardized interface, perfectly compatible with Mark VI/VIe systems, no additional adapter equipment required, enabling efficient installation and commissioning

5. Typical Applications

• Core Application Scenarios: Temperature monitoring of key components in gas turbines, steam turbines, and combined-cycle power plants

• Specific Monitoring Points: Key high-temperature components such as turbine casings, combustors, bearing housings, steam pipelines, flue gas channels, turbine blades, and control valves

• Application Value: Provides real-time and accurate temperature data for unit temperature protection, thermal stress monitoring, load regulation, and safety interlocks, ensuring stable and safe operation of the unit under high-temperature and high-load working conditions, and avoiding equipment damage or shutdown accidents caused by abnormal temperatures

• Extended Applications: Adapts to temperature monitoring scenarios of heavy rotating machinery in oil and gas, chemical and other industries, and is compatible with industrial automation scenarios of Mark VI/VIe control systems