Basic Information

• Model: IS200WNPSH1ABA

• Material Code: MRP708215

• Brand/Series: GE General Electric, Speedtronic Mark VIe Turbine Control System, IS200 Series Negative Power Supply Daughterboard (WNPS)

• Core Purpose: A dedicated -28VDC regulated & buffered power supply daughterboard for the Mark VIe control system. It delivers stable, current-limited, low-ripple negative power to vibration monitoring terminals (e.g., TVBA series) and eddy-current sensors, serving as the core power module for vibration I/O loops.

Key Functions

1. Negative Voltage Regulation & Buffering: Converts backplane +28VDC to stable -28VDC, providing 14 buffered outputs to power eddy-current displacement sensors and vibration acquisition boards (TVBA), suppressing power ripple and ensuring high-precision signal collection.

2. Current Limiting & Fault Diagnostics: Independent current limiting per channel; built-in overcurrent, short-circuit and open-circuit detection. Supports sensor cable ID recognition to prevent hardware mismatches and misconnections, with real-time power anomaly reporting for enhanced system reliability.

3. System Compatibility & Integration: Embedded as a daughterboard in the Mark VIe terminal system, used with PVIB vibration I/O packs and TVBA vibration boards. Industrial wide-temperature, surface-mount design, suitable for power plant/industrial rotating machinery control cabinets.

Key Specifications

• Output: 14 buffered -28VDC outputs, total max current 400mA, ripple ≤280mV peak-to-peak

• Input: Backplane +28VDC

• Operating Temperature: 0°C to +60°C

• Dimensions: Approx. 7.5cm × 6.4cm × 1cm (surface-mount daughterboard)

• Application: Vibration monitoring loops, eddy-current sensor power supply for gas/steam turbines and combined-cycle units

Typical Applications