Description

Product Description

The Bently Nevada 3500/25 Enhanced Keyphasor® module is a dedicated timing and speed reference component within the 3500 machinery protection architecture. It is engineered to derive precise rotational position information from shaft-mounted sensors and distribute synchronized phase signals across the monitoring rack.

This module converts analog inputs from proximity probes or magnetic pickups into stable digital timing pulses. These Keyphasor signals are used by vibration and diagnostic modules to align waveform data with shaft position, enabling accurate phase-based analysis and order tracking.

It is widely deployed in rotating machinery systems where phase-referenced diagnostics are required for performance evaluation and fault detection.

Signal Processing Function

• Converts raw analog shaft signals into digital Keyphasor pulse outputs

• Provides accurate rotational timing reference for the entire rack

• Supports single or dual-channel input configurations

• Ensures synchronized phase alignment across all vibration monitors

• Enables consistent speed and angular position measurement

Measurement Capabilities

• Rotational speed calculation

• Shaft phase angle determination

• Synchronous vibration referencing

• Order tracking analysis for variable speed machines

• Multi-Keyphasor operation for complex mechanical systems

• Support for redundant timing configurations in critical applications

Input Compatibility

• Proximity probe sensors (eddy current type)

• Magnetic pickup transducers

• Analog signal conditioning with digital pulse conversion

• Supports configurable channel architecture (1–2 channels depending on system setup)

System Integration

• Provides timing reference to all 3500-series vibration monitors

• Fully compatible with modules such as 3500/40M, 3500/42M, and 3500/45M

• Required for phase-based vibration diagnostics and waveform alignment

• Supports startup, coast-down, and steady-state analysis workflows

• Enables order tracking and rotor dynamic evaluation

Mechanical Configuration

• Full-height 3500 system module

• Front installation into rack backplane

• Rear I/O termination for sensor connections

• Modular design supports field replacement and maintenance

• Designed for integration within standard 3500 rack architecture

Environmental Performance

• Suitable for continuous operation in harsh industrial environments

• Commonly deployed in:

• Gas and steam turbines

• Compressors and pumps

• Generators and drive trains

• Refinery and petrochemical rotating equipment

• Engineered for high vibration and temperature stability applications

Functional Highlights

• Generates precise Keyphasor pulse trains for shaft reference

• Enhances vibration analysis accuracy through phase alignment

• Supports advanced diagnostics including Bode and polar plots

• Enables order-based vibration analysis in variable speed systems

• Supports redundant timing inputs for increased system reliability

• Acts as a critical synchronization source for machinery diagnostics

FAQ

Q1: What is the main function of the Keyphasor module?
It provides a precise rotational timing reference used for phase-based vibration analysis and speed measurement.

Q2: Can it work with magnetic pickup sensors?
Yes. It supports both proximity probes and magnetic pickup inputs.

Q3: Is this module part of the protection logic?
No. It provides diagnostic timing signals and does not participate in protection trip functions.

Specifications

• Brand: Bently Nevada

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems