DS200TCCBG1A GE

Technical Parameters

Based on the Mark V DS200 series specifications, the DS200TCCBG1A features the following key parameters:

• Primary Function: Mixed Thermocouple/RTD Input Termination Board with CJC and RTD Excitation

• Input Channels: 8 configurable thermocouple/RTD input channels

• Thermocouple Types Supported: J, K, T, E, S, R (configurable)

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

• Cold-Junction Compensation: Onboard high-accuracy thermistor (CJC) with ±0.5°C accuracy typical

• RTD Excitation: Onboard constant current source for RTD measurements (eliminates external excitation requirements)

• 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: 0°C to 60°C ambient temperature, 5% to 95% non-condensing humidity

• Labels: Enhanced labeling with clearly marked channel designations (CH+, CH-, etc.) and type selection guides

• Compliance: UL recognized, CE marked

Advantages and Features

The DS200TCCBG1A offers several distinctive advantages for Mark V system temperature signal termination:

1. Mixed Thermocouple/RTD Support: The DS200TCCBG1A accepts both thermocouple and RTD sensors in a single board, eliminating the need for separate termination boards for different sensor types.

2. RTD Excitation Onboard: Integrated constant current excitation for Pt100 RTDs eliminates the need for external excitation modules or power supplies.

3. Integrated Cold-Junction Compensation: The onboard CJC thermistor ensures accurate thermocouple temperature readings.

4. Multi-Type Support: Supports thermocouple Types J, K, T, E, S, R and Pt100 RTDs, allowing flexible sensor selection.

5. High-Density Termination: With 8 channels, the DS200TCCBG1A provides efficient termination for mixed sensor types in a single slot.

6. Enhanced Labeling: The “A” revision features improved labeling for easier identification and reduced wiring errors.

7. Passive Design: Contains minimal active electronics (CJC thermistor and RTD excitation), making the DS200TCCBG1A highly reliable.

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

Application Cases in Application Fields

The DS200TCCBG1A is deployed across multiple heavy-industrial sectors:

• Combined Cycle Power Plants: A 750MW CCPP facility uses the DS200TCCBG1A to terminate both exhaust thermocouples (EGT) and bearing RTDs, providing comprehensive temperature monitoring in a single board.

• Steam Turbine Retrofits: During a control system refurbishment, a facility installed the DS200TCCBG1A for mixed thermocouple (main steam temperature) and RTD (bearing temperature) monitoring, reducing board count by 50%.

• Gas Pipeline Compressor Stations: The DS200TCCBG1A terminates thermocouples for discharge temperature and RTDs for bearing temperature monitoring.

• Offshore Oil Platforms: The mixed-signal capability of the DS200TCCBG1A has proven valuable on offshore platforms where rack space is limited.

Comparison with Competing Products

Selection Suggestions and Precautions

Before purchasing or installing the DS200TCCBG1A:

• Verify Exact Model: Ensure the board is precisely DS200TCCBG1A, not DS200TCCBG1B or other variants. Different suffixes may have different channel configurations or RTD support.

• Confirm Input Types: Ensure your sensors (thermocouple, RTD) match the DS200TCCBG1A capabilities.

• RTD Wiring: For RTD measurements, use 3-wire or 4-wire configurations as supported by the DS200TCCBG1A. 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 DS200TCCBG1A end only.

• CJC Stability: Ensure adequate airflow around the DS200TCCBG1A and avoid mounting near heat sources to maintain 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.

  • 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.

• Spare Strategy: Maintain at least one spare DS200TCCBG1A on-site.

• Supplier Qualification: Request visual inspection, CJC accuracy verification, and RTD excitation functionality testing before shipment.

Final Recommendation

For GE Mark V turbine systems requiring mixed thermocouple and RTD temperature monitoring in a single termination board, the DS200TCCBG1A is the essential solution. Its 8-channel capacity, integrated RTD excitation, multi-signal support, and onboard CJC provide accurate, reliable signal routing for comprehensive temperature monitoring applications. Prioritize reputable aftermarket suppliers offering tested units with CJC and RTD functionality verification. Maintain spares on-site, use correct wiring practices, and ensure proper polarity to guarantee the long-term reliability of your DS200TCCBG1A and the entire Mark V control system.