Product Introduction: 3500/32M 125720-01
The 3500/32M 125720-01 is a Keyphasor® Module for the Bently Nevada 3500 Machinery Protection System. It is a fundamental component for condition monitoring of rotating machinery. Its core function is to generate a precise once-per-revolution timing pulse (the Keyphasor signal) by detecting a physical reference point on a machine's shaft.
This signal is essential for synchronous vibration analysis. It serves as a phase reference, enabling the measurement of vibration amplitude and phase lag relative to the shaft's rotational position. This allows for critical diagnostic functions such as rotor balancing, analysis of synchronous vibrations, and generating orbit plots. The "M" designation typically indicates a module with specific firmware or hardware revisions suitable for standard monitoring applications.
Detailed Parameters & Specifications
The following table summarizes the key specifications of the module:
| Parameter Category | Specification Details |
|---|---|
| Part Number | 125720-01 |
| Functional Designation | 3500/32M Keyphasor Module |
| Physical Dimensions (H x W x D) | Approximately 200 mm x 60 mm x 220 mm (Standard 3500 series 4-channel module slot size) |
| Weight | Approximately 0.8 kg (1.76 lbs) |
| Power Requirements | Powered from the 3500 rack backplane. Typical consumption: +5V DC. |
| Operating Temperature | -30°C to +65°C (-22°F to +149°F) |
| Input Type | Accepts signals from proximity probes (e.g., 3300 NSv series) or magnetic pickups. The input is designed for a raw AC signal from the transducer. |
| Key Output | A conditioned, buffered Keyphasor pulse (TTL-compatible) distributed to all monitoring modules within the 3500 rack via the backplane. |
| Channels | One independent Keyphasor channel per module. Multiple modules can be used for multiple shafts or reference points. |
| LED Indicators | Provides status LEDs for Power, OK, and Input signal activity. |
| Primary Function | To condition an input signal from a shaft reference mark and generate a reliable once-per-revolution timing pulse for phase reference in vibration analysis. |
Primary Application Scenarios
The 3500/32M module is indispensable in any scenario requiring phase-related vibration measurement and analysis:
Rotor Balancing:
Key Application: The Keyphasor signal is absolutely critical for field balancing of rotors. It provides the necessary phase angle measurement to determine the magnitude and angular location of imbalance, guiding the placement of balancing weights.
Synchronous Vibration Analysis:
Key Application: Enables the separation and analysis of vibration components that are synchronous (1X, 2X, etc.) with shaft speed. This is fundamental for diagnosing common faults like unbalance, misalignment, and shaft cracks.
Orbit & Centerline Plot Generation:
Key Application: The phase reference from this module allows the 3500 system (with appropriate software and frame interface) to plot shaft orbital motion from XY proximity probes. Orbit plots are vital for diagnosing oil whirl/whip, rubs, and other instability conditions.
Startup/Coast-Down (Transient) Analysis:
Key Application: During machine startups and shutdowns, the Keyphasor signal is used to create Bode plots (amplitude and phase vs. speed) and Nyquist plots. These plots are essential for identifying critical speeds, resonance, and other dynamic rotor behaviors.
RPM Measurement & Tachometer Reference:
Key Application: Provides a highly reliable tachometer signal for speed measurement, overspeed detection systems, and as a timing reference for other plant control and monitoring systems.
Global direct procurement guarantee
All products are purchased directly from overseas original manufacturers or authorized channels, 100% guaranteed genuine quality, sufficient spot inventory, and comprehensive model coverage
Quality Commitment
Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
Flexible procurement plan
- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
- Long-term cooperative customers can apply for priority supply
Full service support
7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
Why do so many customers choose us?
On the basis of the same quality, we provide:
- More competitive price system
- Faster logistics response
- More complete technical support (free product technical documentation)
Your trust is the driving force for our continuous progress, submit your requirements immediately to get exclusive quotes
