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1751-147 Woodward MPU Signal Conditioning Module

1751-147 Woodward MPU Signal Conditioning Module

Product Description

The 1751-147 is a signal conditioning and isolation module designed by Woodward for magnetic pickup (MPU) sensors. It converts low-voltage AC pulses from gear tooth sensors into clean, stabilized signals for electronic governors, eliminating...

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SKU: 1751-147
Proveedora: Woodward
tipo: MPU Signal Conditioning Module
Related Series:

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Product Description

The 1751-147 is a signal conditioning and isolation module designed by Woodward for magnetic pickup (MPU) sensors. It converts low-voltage AC pulses from gear tooth sensors into clean, stabilized signals for electronic governors, eliminating common-mode noise and ground loops in industrial and marine environments. This ensures accurate speed input for turbine or engine control systems, preventing erratic governing or nuisance overspeed trips.

Technical Specifications

Specification Description
Model Number 1751-147
Device Type Magnetic Pickup (MPU) Isolation & Conditioning Transformer
Signal Compatibility Passive Magnetic Pickup Units (MPUs)
Isolation Voltage High-dielectric galvanic isolation between input and output
Frequency Handling Optimized for high-speed pulse detection in turbines and engines
Insertion Loss Minimal, preserving pulse integrity at low cranking speeds
Housing Material Industrial-grade encapsulated design for vibration resistance
Dimensions 180 mm x 120 mm x 60 mm
Weight 0.6 kg

Application Scenarios

  • Power generation turbines and engine speed control

  • Marine propulsion systems

  • Mechanical drive systems with high EMI environments

  • Any Woodward control loop (e.g., 2301A, 723, Peak 150) where the MPU is distant from the control panel

Technical FAQ

Why is an isolation transformer needed for an MPU?

  • Low-voltage AC pulses from MPUs are prone to noise from potential differences between sensor and control panel grounds.

  • The 1751-147 provides galvanic isolation, ensuring only true speed pulses reach the controller.

Does it require an external power supply?

  • No, it is passive and derives energy directly from the MPU signal, making it a reliable “fit-and-forget” component.