GE IS200STTCH2ABA Thermocouple Terminal Board | IS230SNTCH4A Mark VIe

Product Description

Overview

The GE IS200STTCH2ABA (IS230SNTCH4A) is a high-density Thermocouple Terminal Board designed for Mark VIe turbine control systems. It provides a reliable interface for field thermocouple wiring, enabling accurate temperature data acquisition when paired with PTCC I/O packs. The modular design supports simplex, duplex, or TMR configurations, making it suitable for critical turbine monitoring and control applications.

Functional Highlights

• Multi-Channel Capability: Handles up to 24 thermocouple inputs, supporting extensive turbine temperature monitoring.

• Wide Thermocouple Support: Compatible with standard types, including J, K, E, T, S, B, R, and N.

• Cold Junction Compensation (CJC): Features integrated thermistors near terminal points to ensure precise ambient temperature correction.

• Compact, Maintenance-Friendly Design: DIN-rail or panel mounting with removable Euro-style terminal blocks simplifies installation and service.

• Passive Reliability: As a passive terminal board, it achieves high MTBF, relying on removable PTCC packs for signal digitization.

• Automatic Identification: Includes an onboard ID chip for seamless recognition by the Mark VIe system, preventing configuration errors.

Performance Characteristics

1. High-Density Signal Termination

• Provides a landing point for up to 24 thermocouple inputs, ideal for monitoring multiple turbine temperature zones.

• Designed to preserve signal integrity, minimizing electrical noise on millivolt thermocouple lines.

2. Accurate Temperature Compensation

• Built-in CJC sensors ensure that ambient temperature at the connection point is accounted for in final readings.

• Maintains high precision for low-voltage thermocouples, including Type S and Type R, commonly used in high-temperature applications.

3. Flexible Redundancy Options

• Compatible with Simplex or TMR (Triple Modular Redundant) configurations.

• Passive design reduces failure risk, while I/O packs handle active signal processing.

4. Diagnostic Support

• When used with PTCC packs, the system can detect open circuits, shorted wires, or configuration mismatches.

• Supports software-defined alerts for out-of-range or abnormal thermocouple readings.

5. Service-Friendly Engineering

• Screw-type Euro-style terminals provide secure, vibration-resistant connections.

• Compact footprint allows PTCC I/O packs to mount directly on the board, eliminating external cabling and simplifying cabinet layout.

Technical Specifications

Applications

• High-density turbine temperature monitoring in gas and steam plants

• Integration into Mark VIe turbine control cabinets

• Safety-critical monitoring using simplex or TMR configurations

• Monitoring exhaust, bearing, and casing temperatures for turbine protection

FAQ

Q: How many thermocouple channels can this board support?
A: Up to 24 channels depending on configuration and paired I/O packs.

Q: Which thermocouple types are compatible?
A: Supports J, K, E, T, S, B, R, and N types.

Q: Is the board compatible with TMR setups?
A: Yes, it supports simplex, dual, and TMR configurations.

Q: How is cold junction compensation handled?
A: Two onboard thermistors provide local CJC near the terminal blocks for precise ambient temperature correction.