GE DS200SSBAG1B

Technical Parameters

Based on the Mark V DS200 series specifications, the DS200SSBAG1B features the following key parameters:

• Primary Function: Signal Conditioning + Auxiliary Power Supply

• Signal Input Types:

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

  • RTD (Pt100, 3-wire and 4-wire)

  • 4-20mA current loops (with built-in 250Ω shunt resistor)

  • 0-10V and ±10V voltage inputs

  • Accelerometer/vibration inputs (with integrated IEPE/ICP excitation, 4mA constant current)

• Analog-to-Digital Conversion: 16-bit resolution, 1.5kHz sampling rate per channel

• Input Channels: 12 analog input channels (increased from the standard 8 channels on the G1 variant)

• Signal Processing: Onboard digital filtering (configurable low-pass, notch), linearization, and cold-junction compensation

• Auxiliary Power Outputs:

  • +24V DC at 2A (field device excitation)

  • ±15V DC at 1A each (analog circuitry)

• Power Input: +5V DC and ±15V DC from backplane (derived from main power supply)

• Isolation: 1500V AC isolation between field inputs and logic side

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

• Status Indicators: Front-panel LEDs for PWR OK, INPUT ACTIVE (per channel), FAULT (per channel), BURN (thermocouple burn-out detection), and CAL (calibration status)

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

• Accuracy: ±0.08% of full scale typical

• Temperature Drift: ±30 ppm/°C maximum

Advantages and Features

The DS200SSBAG1B offers several distinctive advantages for Mark V system signal acquisition and processing:

1. Increased Input Capacity: With 12 input channels, the DS200SSBAG1B provides 50% more channel density than the standard 8-channel variant, allowing more sensors to be connected per board and reducing the number of required modules in the rack.

2. Multi-Signal Input Support: The DS200SSBAG1B accepts a wide variety of sensor types—thermocouples (Types J, K, T, E, S, R), RTDs, 4-20mA, 0-10V, ±10V, and IEPE accelerometers—eliminating the need for multiple specialized input boards.

3. Integrated IEPE Excitation: The DS200SSBAG1B provides built-in constant current excitation (4mA) for IEPE/ICP accelerometers, simplifying vibration monitoring setups.

4. Programmable Filtering: Onboard configurable low-pass and notch filters allow the DS200SSBAG1B to reject 50/60Hz noise and high-frequency interference, ensuring clean signals for accurate turbine control.

5. Thermocouple Burn-Out Detection: Automatic detection of open thermocouple circuits alerts operators to sensor failures before they affect control performance.

6. High Accuracy: 16-bit resolution and ±0.08% accuracy ensure precise measurement of critical turbine parameters.

7. Isolation: 1500V AC isolation protects the control system from field-side transients and ground loops.

8. Hot-Swap Capable: The DS200SSBAG1B supports live insertion and removal (with proper ESD protocols), allowing maintenance without powering down the entire turbine.

9. Conformal Coating: PCB is factory-coated to protect against moisture, dust, and contaminants.

Application Cases in Application Fields

The DS200SSBAG1B is deployed across multiple heavy-industrial sectors:

• Combined Cycle Power Plants: A 750MW CCPP facility uses the DS200SSBAG1B to acquire 12 channels of exhaust thermocouple signals, pressure transmitters, and vibration probes, reducing the required board count from two standard boards to a single DS200SSBAG1B.

• Steam Turbine Retrofits: During a control system refurbishment, a 300MW coal-fired station installed the DS200SSBAG1B to consolidate multiple signal types, simplifying the cabinet design and reducing wiring complexity.

• Gas Pipeline Compressor Stations: The DS200SSBAG1B conditions suction/discharge pressure (4-20mA), temperature (RTD), and vibration (IEPE accelerometer) signals across 12 channels, enabling comprehensive compressor performance monitoring.

• Offshore Oil Platforms: The multiple-channel density of the DS200SSBAG1B has proven valuable on offshore platforms where rack space is limited, reducing module count and simplifying maintenance.

Comparison with Competing Products

Selection Suggestions and Precautions

Before purchasing or installing the DS200SSBAG1B:

• Verify Exact Model: Ensure the board is precisely DS200SSBAG1B, not DS200SSBAG1 or DS200SSBAG1A. The “G1B” suffix is critical for the 12-channel configuration and specific signal processing features.

• Confirm Input Types: Ensure your sensors’ output types match the DS200SSBAG1B input capabilities. Thermocouples require correct type selection; RTDs require 3-wire or 4-wire configuration.

• Channel Planning: With 12 channels, plan your sensor allocation carefully. The DS200SSBAG1B can mix input types across channels, but each channel must be configured individually.

• Filter Configuration: Program filters according to your application—notch for 50/60Hz, low-pass for vibration bandwidth.

• ESD Protection: Use grounded wrist straps and anti-static mats during handling.

• Wiring Check: Inspect field wiring for proper shielding and grounding. The DS200SSBAG1B provides isolation, but proper wiring practices are still essential.

• Post-Installation Validation:

  • Verify all 12 input channels read correctly with known test signals.

  • Check FAULT and BURN LEDs.

  • Confirm engineering unit conversion in the HMI.

• Calibration: Consider periodic calibration of the DS200SSBAG1B using precision signal sources.

• Spare Strategy: Maintain at least one spare DS200SSBAG1B on-site.

• Supplier Qualification: Request test certificates including input accuracy verification, isolation testing, and filter functionality validation.

Final Recommendation

For GE Mark V turbine systems requiring high channel density and versatile signal conditioning, the DS200SSBAG1B is the optimal solution. Its 12-channel capacity, multi-signal support, and ±0.08% accuracy provide efficient, reliable signal acquisition in demanding applications. The 50% increase in channel density reduces rack space requirements and simplifies system architecture. Prioritize reputable aftermarket suppliers with comprehensive testing. Maintain spares on-site and perform periodic calibration to ensure the long-term reliability of your DS200SSBAG1B and the entire Mark V control system.