GE IS230TCISH9C

Product Parameters

Advantages and Key Features

• Enhanced CJC Accuracy – The IS230TCISH9C features an advanced solid‑state cold junction compensation sensor with ±0.05°C accuracy (compared to ±0.1°C on the IS230TCISH9), providing the highest measurement precision for critical turbine temperature monitoring applications.

• Extended RTD Support – Adds Ni100 RTD support to the already comprehensive list of PT100 (both α standards), PT500, PT1000, Ni120, and Cu10, ensuring compatibility with all common RTD sensor types used in GE turbine applications.

• Gold-Plated Contacts – The IS230TCISH9C features gold‑plated screw‑clamp terminals, providing superior corrosion resistance and consistent low‑resistance connections in harsh industrial environments, particularly in offshore and chemical plant applications.

• Enhanced ESD Protection – Complies with IEC 61000‑4‑2 Level 4 (8 kV contact, 15 kV air), providing superior protection against electrostatic discharge during maintenance and field wiring operations.

• Improved Signal Integrity – Enhanced RC filtering and noise rejection circuitry on the IS230TCISH9C ensures reliable measurements in high‑EMI environments such as turbine generator areas and variable frequency drive installations.

• Comprehensive Sensor Support – Supports Type C thermocouples (tungsten‑rhenium) for high‑temperature applications up to 2320°C, as well as all standard thermocouple types (J, K, T, E, R, S, B, N).

• Pluggable Terminal Design – The IS230TCISH9C features a 2‑piece pluggable terminal block design, allowing field wiring to be disconnected without removing individual wires, simplifying maintenance and module replacement.

• High Reliability – Flame‑retardant housing (UL 94 V‑0), gold‑plated contacts, and robust construction ensure long‑term reliability in extreme industrial environments.

Application Fields and Use Cases

1. Exhaust Gas Temperature (EGT) Monitoring

The IS230TCISH9C connects multiple exhaust gas thermocouples to the IS220PTCCH1A, providing high‑accuracy EGT data for combustion dynamics control, flame monitoring, and turbine protection. The enhanced CJC accuracy (±0.05°C) ensures precise EGT spread monitoring, critical for detecting combustion anomalies.

2. Turbine Inlet Temperature Monitoring

Connects Type R/S/B high‑temperature thermocouples for turbine inlet temperature measurement, with the IS230TCISH9C providing the accuracy required for thermal stress management and performance optimization.

3. Critical Bearing Temperature Monitoring

Provides connections for PT100 RTD sensors on high‑speed turbine bearings. The IS230TCISH9C supports 3‑wire and 4‑wire configurations for lead resistance compensation, with gold‑plated contacts ensuring reliable connections.

4. Generator Stator and Rotor Temperature

Connects PT100 RTD sensors for generator winding temperature monitoring. The IS230TCISH9C extended RTD support (including Ni100) ensures compatibility with generator OEM sensor types.

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 with high accuracy.

6. Retrofit and Upgrade Projects

The IS230TCISH9C is the recommended upgrade from legacy Mark VI temperature termination boards (IS200TCISH9C), offering pluggable connections, superior CJC accuracy, gold‑plated contacts, and enhanced ESD protection.

Comparison with Competing Products

Key Differentiators: The IS230TCISH9C is the most advanced temperature termination board in the GE Mark VIe lineup, offering superior CJC accuracy (±0.05°C), gold‑plated contacts, Level 4 ESD protection, and the most comprehensive sensor support (including Ni100 RTDs and Type C thermocouples). It provides enhanced reliability for critical turbine temperature monitoring applications compared to standard tin‑plated boards. The IS230TCISH9C is the definitive choice for GE Mark VIe temperature applications requiring the highest accuracy and reliability.

Selection Suggestions and Precautions

Selection Criteria

• Choose the IS230TCISH9C for high-density thermocouple or RTD temperature monitoring applications requiring the highest CJC accuracy (±0.05°C), gold‑plated contacts, and enhanced ESD protection.

• For standard temperature monitoring with less stringent accuracy requirements, consider the IS230TCISH9 or IS230TCISH7C.

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

• Ensure proper channel count planning: 16 channels per IS230TCISH9C with appropriate module selection.

• Specify the IS230TCISH9C for corrosive environments (offshore, chemical plants) where gold‑plated contacts are essential for reliability.

Critical Precautions

1. CJC Sensor Protection – The CJC sensor on the IS230TCISH9C provides ±0.05°C accuracy only when the terminal block is in thermal equilibrium. Protect the IS230TCISH9C from drafts, direct sunlight, and heat sources to achieve specified accuracy.

2. Gold‑Plated Contact Care – Do not use abrasive cleaning agents on the IS230TCISH9C gold‑plated contacts. Use only approved contact cleaners. Avoid touching the contacts with bare hands, as skin oils may affect contact resistance.

3. Thermocouple Wiring – Use the correct thermocouple extension wire matching the thermocouple type. The IS230TCISH9C does not compensate for improper wire types.

4. 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.

5. Shielding and Grounding – Terminate shields at the field device end only, not at the IS230TCISH9C, to prevent ground loops and maintain isolation integrity.

6. Terminal Tightening – Use the specified torque (0.5–0.6 N·m) for screw terminals. Gold‑plated terminals are softer than tin‑plated; avoid over‑tightening to prevent thread damage.

7. Sensor Configuration – Configure each channel via the Mark VIe Toolbox for the correct thermocouple type, RTD type, and wiring configuration. Incorrect configuration will produce erroneous readings despite the IS230TCISH9C high accuracy.

8. ESD Handling – Use grounded wrist straps when handling the IS230TCISH9C. Although it provides Level 4 ESD protection, the gold‑plated contacts are still susceptible to static damage from improper handling.

9. Environmental Considerations – The IS230TCISH9C is rated for -40°C to +85°C operation. Ensure the cabinet or enclosure maintains this temperature range, particularly for the CJC sensor.

10. Obsolescence – The IS230TCISH9C is in active production with long‑term support. It is the recommended choice for new Mark VIe temperature monitoring installations. Keep spare boards for critical turbine applications.