GE DS200TBCAG2A

Technical Parameters

Based on the Mark V DS200 series specifications, the DS200TBCAG2A features the following key parameters:

• Primary Function: Thermocouple/Analog Termination Board with CJC

• Input Channels: 16 configurable thermocouple/analog input channels (double the G1A capacity)

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

• Analog Input Support: 4-20mA (with optional shunt resistor), 0-10V, RTD (Pt100, 3-wire)

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

• 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 field wiring

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

• Labels: Clearly marked channel designations (CH1+, CH1-, CH1GND, etc.) with type selection guides

• Compliance: UL recognized, CE marked

Advantages and Features

The DS200TBCAG2A offers several distinctive advantages for Mark V system signal termination:

1. High Channel Density: With 16 input channels, the DS200TBCAG2A provides double the capacity of the G1A variant, significantly reducing the number of required boards in high-sensor-density applications.

2. Integrated Cold-Junction Compensation: The onboard CJC thermistor ensures accurate thermocouple temperature readings by compensating for ambient temperature variations at the DS200TBCAG2A termination point.

3. Multi-Signal Support: Accepts thermocouples, 4-20mA, 0-10V, and RTD signals, providing flexibility for various sensor types.

4. Screw-Type Terminals: Uses reliable screw-type connections that accommodate 0.5-2.5mm² wire, ensuring secure, long-term field connections.

5. Passive Design: Contains no active electronics (other than CJC thermistor), making the DS200TBCAG2A highly reliable.

6. Direct Rack Integration: Plugs directly into the Mark V backplane, providing a clean interface.

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

8. Clear Labeling: Each channel is clearly marked, reducing wiring errors.

Application Cases in Application Fields

The DS200TBCAG2A is deployed across multiple heavy-industrial sectors:

• Combined Cycle Power Plants: A 750MW CCPP facility uses the DS200TBCAG2A to terminate 16 channels of exhaust thermocouple sensors and pressure transmitters. The high channel density reduced the required board count from two G1A boards to a single G2A, saving rack space.

• Steam Turbine Retrofits: During a control system refurbishment, a facility installed the DS200TBCAG2A for main steam temperature and pressure monitoring across multiple stages, consolidating wiring into fewer boards.

• Gas Pipeline Compressor Stations: The DS200TBCAG2A terminates thermocouples and pressure transmitters for comprehensive compressor performance monitoring across multiple compressor stages.

• Offshore Oil Platforms: The high channel density of the DS200TBCAG2A has proven valuable on offshore platforms where rack space is limited.

Comparison with Competing Products

Selection Suggestions and Precautions

Before purchasing or installing the DS200TBCAG2A:

• Verify Exact Model: Ensure the board is precisely DS200TBCAG2A, not DS200TBCAG1A or other variants. The “G2A” suffix is critical for the 16-channel high-density configuration.

• Confirm Input Types: Ensure your sensors (thermocouple, 4-20mA, RTD) match the DS200TBCAG2A capabilities.

• Channel Planning: With 16 channels, plan your sensor allocation carefully. The DS200TBCAG2A can mix input types across channels, but each channel must be configured individually.

• 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 shield at the DS200TBCAG2A end only.

• CJC Accuracy: Ensure adequate airflow around the DS200TBCAG2A and avoid mounting near heat sources.

• 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.

  • Verify signal readings at the HMI match expected values for all channels.

• Spare Strategy: Maintain at least one spare DS200TBCAG2A on-site, especially if you rely on its high channel density.

• Supplier Qualification: Request visual inspection, CJC accuracy verification, and documentation of the 16-channel configuration.

Final Recommendation

For GE Mark V turbine systems requiring high-density thermocouple and analog signal termination with integrated cold-junction compensation, the DS200TBCAG2A is the optimal solution. Its 16-channel capacity doubles the density of the standard G1A variant, reducing board count and rack space requirements in high-sensor-density applications. The multi-signal support, onboard CJC, and robust screw-terminals provide accurate, reliable signal routing for critical temperature and pressure monitoring applications. Prioritize reputable aftermarket suppliers offering tested units with CJC accuracy verification. Maintain spares on-site, use correct thermocouple wiring, and ensure proper polarity to guarantee the long-term reliability of your DS200TBCAG2A and the entire Mark V control system.