GE DS200DTBAG1

Technical Parameters & Specifications

Core Advantages & Key Features

• Multi-Type Input Support – The DS200DTBAG1 accepts both thermocouple and RTD inputs on the same board, eliminating the need for separate modules for different sensor types. Each channel can be independently configured via software for specific sensor type.

• High Channel Density – With 16 input channels on a single 6U board, the DS200DTBAG1 maximizes rack space efficiency, allowing more temperature points to be monitored in a compact footprint.

• Integrated Cold Junction Compensation – The board includes an onboard temperature sensor for accurate cold junction compensation, ensuring precise thermocouple measurements without requiring external reference junctions.

• High Accuracy and Resolution – 16-bit resolution and ±0.1% accuracy provide reliable temperature data for critical applications such as exhaust gas temperature monitoring and turbine inlet temperature control.

• Automatic Linearization – The DS200DTBAG1 provides built-in linearization for all supported thermocouple types, converting raw voltage signals directly to temperature values without requiring external calculation.

• Channel-to-Backplane Isolation – 1500 VAC isolation protects the main processor and other system components from electrical noise and faults on field sensor wiring.

• Diagnostic LEDs – Onboard indicators show channel activity, communication health, and fault conditions for quick troubleshooting.

• Robust Environmental Protection – Conformal coating and gold-plated edge connectors ensure reliable operation in humid, dusty, or corrosive environments typical of power generation and oil & gas facilities.

• Plug-and-Play Compatibility – The DS200DTBAG1 integrates seamlessly with all Mark V main processors, including DS200CPCAG1A, and works alongside driver boards such as DS200DPCAG1ADC and DS200DPCAG1ADB without additional interface hardware.

Typical Applications

• Gas Turbine Exhaust Gas Temperature (EGT) Monitoring – Measures thermocouple signals from multiple exhaust thermocouples for temperature averaging, hot spot detection, and turbine protection.

• Turbine Inlet Temperature Control – Provides high-accuracy temperature feedback for fuel control algorithms to maintain optimal combustion efficiency.

• Bearing Temperature Surveillance – Monitors RTDs or thermocouples installed on turbine and compressor bearings for early warning of overheating or lubrication issues.

• Compressor Discharge Temperature Monitoring – Measures process temperatures for performance calculations and surge protection algorithms.

• Steam Turbine Metal Temperature Monitoring – Monitors casing and rotor temperatures during startup and shutdown for thermal stress management.

• Process Temperature Monitoring – Provides temperature inputs for various balance-of-plant applications in CHP and industrial facilities.

Field Example: A European combined-cycle plant replaced aging temperature input modules with DS200DTBAG1 boards. The improved accuracy and faster sampling enabled tighter control of turbine inlet temperature, reducing NOx emissions by 8% and improving thermal efficiency by 1.2%.

Comparison: DS200DTBAG1 vs. Separate Input Modules vs. Competitor

Selection Guidelines & Precautions

• Verify Sensor Type for Each Channel – Configure each of the 16 channels via software for the correct thermocouple type or RTD configuration (2-wire or 3-wire) before commissioning. Incorrect configuration will result in inaccurate readings.

• Check Input Range Limits – Ensure the expected temperature ranges for each sensor are within the supported range for the configured sensor type. Exceeding limits may cause inaccurate readings or damage.

• Use Proper Thermocouple Wiring – Use extension-grade thermocouple wire with correct polarity and color coding. Avoid copper wire connections between thermocouple and board unless using a thermocouple-to-copper junction block with cold junction compensation.

• RTD Wiring Practices – For 3-wire RTDs, ensure all three connections are properly made to the board to enable lead-wire compensation. Refer to GE manual GEK-119635 for terminal assignment details.

• Shielded Cable – Use shielded twisted-pair cables for all sensor connections to minimize EMI pickup. Connect shields at the board end only to avoid ground loops.

• Cold Junction Compensation – The onboard cold junction sensor measures the board’s terminal block temperature. Ensure adequate airflow around the terminal block area to allow accurate compensation. Avoid mounting heat-generating components adjacent to the DS200DTBAG1.

• Firmware Compatibility – The DS200DTBAG1 is compatible with all Mark V main processor firmware versions. No special firmware updates are required for basic temperature input functionality.

• Spare Parts Strategy – The DS200DTBAG1 is the standard temperature input board for Mark V systems. Maintain at least one unit as a cold spare, particularly for systems with extensive temperature monitoring requirements.

Summary

The DS200DTBAG1 is a high-density, high-accuracy temperature input board for GE Mark V systems, supporting both thermocouple (7 types) and RTD (2-wire and 3-wire) sensors on 16 channels with 16-bit resolution, integrated cold junction compensation, and 1500 VAC isolation. It provides reliable temperature data for critical applications including exhaust gas temperature monitoring, bearing surveillance, and turbine inlet temperature control. The board integrates seamlessly with DS200CPCAG1A processors and works alongside driver boards including DS200DPCAG1ADC and DS200DPCAG1ADB. Selection requires attention to sensor type configuration, proper wiring practices, cold junction compensation factors, and cable shielding to ensure accurate and reliable temperature measurement in critical turbine and compressor control applications.