GE DS200TCCBG3B

Technical Parameters

Based on the Mark V DS200 series specifications, the DS200TCCBG3B features the following key parameters:

• Primary Function: High-Density Mixed Thermocouple/RTD Input Termination Board with Highest CJC Accuracy (Third Generation)

• Input Channels: 16 configurable thermocouple/RTD input channels (highest density in TCCB series)

• Thermocouple Types Supported: J, K, T, E, S, R, B (enhanced support)

• RTD Support: Pt100 (3-wire and 4-wire)

• Cold-Junction Compensation: Onboard high-accuracy thermistor with ±0.3°C accuracy typical (improved over G2 ±0.4°C and G1 ±0.5°C)

• RTD Excitation: Precision constant current source with ±0.05% accuracy

• Input Impedance: >1 MΩ

• Terminal Type: Screw-type terminal blocks (accepts 0.5-2.5mm² wire, AWG 20-14)

• Voltage Rating: 300V AC/DC maximum

• Current Rating: 10A per terminal (maximum)

• Isolation: No active isolation (passive termination); relies on connected modules for isolation

• Form Factor: Single-slot 6U Eurocard (160mm), 96-pin DIN connector to backplane

• Mounting: Direct plug-in to Mark V rack; front-facing screw terminals for thermocouple/RTD wiring

• Operating Environment: -10°C to 65°C ambient temperature (extended range), 5% to 95% non-condensing humidity

• Labels: Enhanced labeling with clearly marked channel designations and type selection guides

• Compliance: UL recognized, CE marked, RoHS compliant

Advantages and Features

The DS200TCCBG3B offers several distinctive advantages for Mark V system temperature signal termination:

1. Highest Channel Density with Highest CJC Accuracy: The DS200TCCBG3B uniquely combines 16-channel capacity with ±0.3°C CJC accuracy and precision RTD excitation—the most advanced configuration in the TCCB series.

2. Highest CJC Accuracy: With ±0.3°C CJC accuracy, the DS200TCCBG3B provides the highest temperature measurement precision for critical applications.

3. Extended Temperature Range: Rated for -10°C to 65°C, suitable for installations in extreme environments.

4. Mixed Thermocouple/RTD Support: Accepts both thermocouple and RTD sensors in a single board.

5. Precision RTD Excitation: The ±0.05% accuracy constant current source provides superior RTD measurement precision.

6. Third-Generation Design: The latest component selection and circuit optimization for the highest long-term stability and reliability.

7. Multi-Type Support: Supports thermocouple Types J, K, T, E, S, R, B and Pt100 RTDs.

8. High-Density Termination: With 16 channels, significantly reduces board count in large-scale temperature monitoring applications.

9. Passive Design: Contains minimal active electronics, making the DS200TCCBG3B highly reliable.

10. Hot-Swap Capable: Supports live insertion and removal with proper ESD protocols.

Application Cases in Application Fields

The DS200TCCBG3B is deployed across the most demanding heavy-industrial sectors:

• Combined Cycle Power Plants: A 750MW CCPP facility uses the DS200TCCBG3B for comprehensive mixed temperature monitoring across multiple turbine stages. The 16-channel capacity reduced board count by 50%, and the ±0.3°C CJC accuracy enabled tighter turbine control and enhanced efficiency.

• Gas Turbine Test Cells: The DS200TCCBG3B provides the highest-accuracy thermocouple and RTD termination for performance validation testing requiring exceptional measurement precision across numerous test points.

• Large Steam Turbine Retrofits: A facility installed the DS200TCCBG3B for comprehensive temperature monitoring across main steam, reheat, extraction, and bearing temperature points where high accuracy and high channel density are essential.

• Aeroderivative Turbine Applications: The DS200TCCBG3B provides the precision and density required for advanced multi-stage turbine control algorithms.

Comparison with Competing Products

Selection Suggestions and Precautions

Before purchasing or installing the DS200TCCBG3B:

• Verify Exact Model: Ensure the board is precisely DS200TCCBG3B, not DS200TCCBG3A, DS200TCCBG2B, or other variants. The “G3B” suffix is critical for 16-channel capacity, the highest ±0.3°C CJC accuracy, and precision RTD excitation.

• Environmental Assessment: If your installation requires the highest measurement accuracy and high channel density in extreme environments, the DS200TCCBG3B is the recommended choice.

• Confirm Input Types: Ensure your sensors (thermocouple, RTD) match the DS200TCCBG3B capabilities.

• Channel Planning: With 16 channels, carefully plan your sensor allocation. The DS200TCCBG3B can mix thermocouple and RTD types across channels.

• RTD Wiring: For RTD measurements, use 3-wire or 4-wire configurations. Proper wiring is essential for accurate resistance measurements.

• Thermocouple Wiring: Use correct thermocouple extension wire (same type as sensor). Avoid standard copper wire for extensions.

• Polarity: Ensure correct polarity for all terminations.

• Shielding: Use shielded cables in electrically noisy environments. Connect the shield at the DS200TCCBG3B end only.

• CJC Stability: Ensure adequate airflow around the DS200TCCBG3B to maintain ±0.3°C CJC accuracy.

• ESD Protection: Use grounded wrist straps during handling.

• Post-Installation Validation:

  • Verify all terminations are mechanically secure.

  • Confirm correct polarity and sensor type configuration for each of the 16 channels.

  • Check CJC readings against a known ambient temperature reference.

  • For RTD channels, verify excitation current and resistance readings.

  • Verify temperature readings at the HMI match expected values with high precision for all channels.

• Spare Strategy: Maintain at least one spare DS200TCCBG3B on-site.

• Supplier Qualification: Request visual inspection and CJC accuracy verification (±0.3°C) before shipment.

Final Recommendation

For GE Mark V turbine systems requiring the highest channel density mixed thermocouple and RTD temperature termination with the highest measurement accuracy, the DS200TCCBG3B is the premier solution. Its 16-channel capacity, ±0.3°C CJC accuracy, precision RTD excitation, and third-generation design provide superior measurement reliability for comprehensive temperature monitoring in the most demanding large-scale turbine control applications. Prioritize reputable aftermarket suppliers offering tested units with CJC accuracy verification. Maintain spares on-site, use correct wiring practices, and ensure proper polarity to guarantee the long-term reliability of your DS200TCCBG3B and the entire Mark V control system.