DS200VPBLG1ACC GE

Detailed Technical Parameters

GE DS200VPBLG1ACC provides comprehensive valve position control and monitoring functions. The board incorporates 4 dedicated LVDT input channels with onboard excitation generation (adjustable 2.5kHz to 10kHz, 3V to 15V RMS) and synchronous demodulation with 16-bit resolution and ±0.05% full-scale accuracy for position feedback. Each LVDT channel features individual gain and phase adjustment to accommodate different transducer sensitivities. The board provides 4 analog output channels (14-bit resolution, 0-10V, ±10V, or 4-20mA configurable) for driving proportional solenoid valves or servo valves, with output settling time under 2ms for fast response. Additionally, the board includes 8 digital input channels (24V DC nominal), 8 digital output channels (solid-state relays rated at 0.5A), and 4 auxiliary analog input channels (16-bit resolution, configurable for 0-10V or 4-20mA) for monitoring valve-related pressures, temperatures, or limit switches. Onboard processing handles LVDT excitation signal generation, demodulation, linearization, valve position control loops with PID algorithms, and diagnostic monitoring of valve health parameters. The “ACC” configuration includes upgraded precision components with 25ppm/°C temperature coefficients and extended temperature operation. Communication with the Mark V main processor occurs through a proprietary backplane interface at 8MB/s with 5ms cycle time. GE DS200VPBLG1ACC draws approximately 22W from the +5V DC and ±15V DC backplane rails and features conformal coating with vibration tolerance rated at 6G (10-500Hz) and shock resistance at 30G.

Advantages & Features

GE DS200VPBLG1ACC offers several distinctive advantages that differentiate it from standard valve control boards and from third-party position controllers. The integrated LVDT conditioning eliminates separate signal conditioners, reducing cabinet footprint and simplifying wiring. The 16-bit position resolution provides precise feedback for tight valve control, enabling accurate fuel flow and steam admission. The “ACC” temperature-stable components ensure consistent performance in extreme environments.

Application Cases & Application Fields

GE DS200VPBLG1ACC is deployed in turbine control applications requiring precise valve positioning. In a 500MW combined-cycle plant, the board provides fuel control valve position control and feedback for the gas turbine. The extended temperature components ensure stable performance in high-temperature environments.

Competitor Comparison

Versus third-party valve controllers, GE DS200VPBLG1ACC provides seamless Mark V integration. However, its channel count is limited compared to some commercial multi-axis controllers.

Selection Suggestions

Choose GE DS200VPBLG1ACC for Mark V installations requiring precise valve positioning with LVDT feedback. Verify LVDT transducer compatibility with excitation settings. Maintain spares considering 16-20 week lead times.

Critical Precautions

Never ground LVDT cable shields at multiple points. Ensure proper LVDT wiring and phase alignment. Perform valve calibration procedures before commissioning. Over 35% of field issues trace to incorrect LVDT wiring or phase errors.