Woodward 8440-2165 SPM-D2-11

Woodward 8440-2165 SPM-D2-11

Product Introduction
The Woodward 8440-2165 SPM-D2-11 is a specialized variant of the 8440-2165, configured specifically for speed and position monitoring applications. It features enhanced signal processing algorithms optimized for dual-channel MPU processing and mechanical position tracking.

Request Quote
Category:

Description

Woodward 8440-2165 SPM-D2-11

Technical Specifications

  • Input Type: Dual-channel magnetic pickup (MPU) with phase comparison.
  • Position Input: LVDT or potentiometer feedback for valve position.
  • Processing: Dedicated DSP core for vibration and phase analysis.
  • Outputs: 4-20 mA speed/position transmitters plus discrete relays.
  • Update Rate: 1 ms for critical protection functions.

Functional Features

  • Phase Monitoring: Tracks shaft position relative to a once-per-revolution marker.
  • Vibration Detection: Identifies abnormal vibration patterns indicative of bearing wear.
  • Dual-Channel Voting: 2oo3 logic for critical overspeed protection.
  • Position Limiting: Configurable high/low position alarms and trips.

Application Scenarios
Used in steam turbine valve control, compressor anti-surge applications, and any system requiring precise shaft position monitoring.

Performance Parameters

  • Position Accuracy: ±0.1% of full scale.
  • Phase Resolution: 0.1 degree at rated speed.
  • Vibration Bandwidth: 10 Hz to 10 kHz.

Material Composition
Same rugged construction as 8440-2165, with additional shielding on MPU input circuits.

Structural Characteristics

  • Labeling: Clearly marked “SPM-D2-11” on front panel.
  • Test Points: Dedicated BNC connectors for oscilloscope access to MPU signals.
  • DIP Switches: Hardware-selectable MPU input impedance.

Working Principle
The module processes two MPU signals to calculate shaft speed and angular position. It compares the phase relationship between channels to detect tooth damage or shaft eccentricity. Position feedback is used to verify valve stroke and detect actuator binding.

Installation Requirements

  • MPU sensors must be gapped precisely per manufacturer specifications.
  • Position feedback linkage must be mechanically secure and free of backlash.
  • Use double-shielded cable for MPU connections in high-noise environments.

Usage Precautions

  • Verify MPU signal amplitude at minimum cranking speed before enabling protection.
  • Do not use standard 8440-2165 firmware on SPM-D2-11 hardware.
  • Calibrate position feedback at both mechanical end-stops.

Related products