GE IS230TCISH9

Product Parameters

Advantages and Key Features

• High-Density Temperature Termination – The IS230TCISH9 supports up to 16 thermocouple or RTD channels per terminal board, enabling comprehensive temperature monitoring of large turbines (e.g., 24+ EGT thermocouples) with minimal board count.

• Enhanced CJC Accuracy – Features a high-accuracy (±0.1°C) solid-state cold junction compensation sensor, providing superior measurement accuracy for critical turbine temperature applications. The CJC sensor is factory-calibrated and linearized for optimal performance.

• Extended Thermocouple Support – Supports Type C thermocouples (tungsten‑rhenium) in addition to standard types J, K, T, E, R, S, B, and N, accommodating high-temperature applications up to 2320°C.

• Flexible RTD Support – Supports both α=0.00385 (DIN) and α=0.00392 (American) PT100 standards, as well as PT500, PT1000, Ni120, and Cu10 RTD types.

• Integrated Signal Conditioning – Provides mounting locations for termination resistors, filter capacitors, and ESD protection components, enabling optimization for specific sensor types and reducing external components.

• Pluggable Terminal Design – The IS230TCISH9 features a 2-piece pluggable terminal block design, allowing field wiring to be disconnected without removing individual wires, simplifying maintenance and module replacement.

• Wide Operating Temperature Range – Rated for -40°C to +85°C, suitable for extreme environments including arctic and desert installations.

• High Reliability – Flame-retardant housing (UL 94 V‑0) and robust screw-clamp connections ensure long-term reliability in harsh industrial environments.

Application Fields and Use Cases

1. Exhaust Gas Temperature (EGT) Monitoring

The IS230TCISH9 connects multiple exhaust gas thermocouples to the IS220PTCCH1A, providing critical EGT data for combustion dynamics, flame monitoring, and turbine protection. With 16-channel capacity, two IS230TCISH9 boards can handle up to 32 EGT thermocouples on large Frame 7/9 turbines.

2. Turbine Inlet Temperature Monitoring

Connects Type R/S/B high-temperature thermocouples for turbine inlet temperature measurement, essential for thermal stress management and performance optimization.

3. Bearing Temperature Monitoring

Provides connections for PT100 RTD sensors on turbine bearings, with 3‑wire or 4‑wire configurations for lead resistance compensation. The IS230TCISH9 supports up to 16 bearing temperature points for comprehensive machine health monitoring.

4. Generator Stator and Rotor Temperature

Connects PT100 RTD sensors for generator winding temperature monitoring, preventing thermal overload and extending equipment life.

5. Combustion Chamber Monitoring

Individual thermocouple connections for each combustion chamber enable early detection of flame-out, combustion instability, and can-to-can temperature variations.

6. Retrofit and Upgrade Projects

The IS230TCISH9 is the recommended upgrade from legacy Mark VI temperature termination boards (IS200TCISH9), offering pluggable connections, enhanced CJC accuracy, and support for modern temperature modules.

Comparison with Competing Products

Key Differentiators: The IS230TCISH9 is the most advanced and comprehensive temperature termination board in the GE Mark VIe lineup. It offers the widest thermocouple support (including Type C) and RTD support (including both PT100 standards). Its high-density 16-channel capacity equals the IS230TCISH7C but with enhanced sensor type support. Compared to the universal IS230TBTCH1B, the IS230TCISH9 is specifically optimized for temperature signals with superior CJC accuracy and noise rejection. Compared to competitors, it offers the widest temperature range and the most comprehensive sensor support.

Selection Suggestions and Precautions

Selection Criteria

• Choose the IS230TCISH9 for high-density thermocouple or RTD temperature monitoring applications requiring the broadest sensor support and enhanced CJC accuracy.

• For applications requiring fewer temperature channels or mixed signal types, consider the IS230TCISH7C or IS230TBTCH1B.

• Verify compatibility with the specific I/O module: IS220PTCCH1A for thermocouples or IS220PRTDH1A for RTDs.

• Ensure proper channel count planning: 16 channels per IS230TCISH9 with appropriate module selection.

Critical Precautions

1. CJC Sensor Protection – The CJC sensor on the IS230TCISH9 is highly sensitive to thermal gradients. Do not mount the terminal block near heat sources (e.g., power supplies, transformers, hot pipes). Maintain a stable ambient temperature around the CJC sensor for optimum accuracy.

2. Thermocouple Wiring – Use the correct thermocouple extension wire matching the thermocouple type (J, K, T, E, R, S, B, N, C). Do not use copper wire for thermocouple extensions, as this introduces additional junction errors.

3. RTD Wiring – For 3‑wire RTDs, ensure all three leads have the same resistance. For 4‑wire RTDs, separate sense and excitation wires. Use shielded twisted-pair cables for all RTD connections.

4. Shielding and Grounding – Terminate shields at the field device end only, not at the IS230TCISH9, to prevent ground loops. Use proper grounding practices to minimize noise.

5. Terminal Tightening – Use the specified torque (0.5–0.6 N·m) for screw terminals. Over-tightening may damage the terminal; under-tightening may cause intermittent connections.

6. Sensor Configuration – Configure each channel via the Mark VIe Toolbox for the correct thermocouple type, RTD type, and wiring configuration (2/3/4‑wire). Incorrect configuration will produce erroneous readings.

7. ESD Handling – Use grounded wrist straps when handling the IS230TCISH9 to prevent static damage.

8. Obsolescence – The IS230TCISH9 is in active production with long-term support. For future projects requiring additional features, evaluate the IS230TCISH9A or other Mark VIe temperature termination board variants when available. Keep spare boards for critical temperature monitoring applications.