Product Description

Overview

The Bently Nevada 149369-01 (3500/25) is a two-channel, half-height Keyphasor module designed for the 3500 Machinery Protection System. It converts signals from proximity probes or magnetic pickups into digital Keyphasor pulses, providing precise once-per-turn timing for vibration analysis and rotational speed measurements. The module ensures accurate phase reference for vector calculations such as 1X vibration amplitude and phase.

This enhanced version replaces the legacy 125792-01 module, offering advanced signal processing capabilities while maintaining full compatibility with existing 3500 systems.

Key Features

• Generates once-per-turn and multi-event-per-turn Keyphasor signals

• Two-channel operation for dual-input monitoring

• Compatible with up to eight Keyphasor signals in paired configurations

• Supports phase and rotational speed measurement for complex machinery

• Field-upgradeable firmware and integration with System 1 for asset management

• Hot-swappable design allows replacement without interrupting rack operation

Technical Specifications

Applications

• Phase analysis for detecting unbalance, misalignment, and resonance

• Monitoring rotational speed and vibration in turbines, compressors, and pumps

• Redundant configurations for critical machinery requiring continuous operation

• Integration with advanced diagnostic software for predictive maintenance

FAQ

Q: How many Keyphasor signals can the system accept?
A: Standard configuration allows four Keyphasor inputs; paired setups can handle up to eight.

Q: Can the module be replaced without shutting down the system?
A: Yes, the 149369-01 is hot-swappable in non-hazardous areas.

Q: Is the module compatible with older 3500 systems?
A: Yes, it fully replaces the 125792-01 module and maintains downward compatibility.

Q: Can this module measure phase accurately?
A: Yes, it supports phase measurement with high resolution, although an isolated version may introduce slight phase shifts.