Overview

The Bently Nevada 3500/25 Keyphasor I/O Module (126648-02) is an essential component of the Bently Nevada 3500 Machinery Protection System. It provides precise phase reference signals used for vibration correlation, speed measurement, and advanced diagnostics. Working together with magnetic or optical Keyphasor probes, the module delivers accurate timing information that enables critical analyses such as order tracking, phase analysis, and rotor speed determination.
It is widely deployed across industries where high-speed rotating equipment requires precise, reliable monitoring.

Technical Data

Key Features

• Dual-channel architecture for redundancy and improved reliability

• High-accuracy phase reference for speed and vibration analysis

• Supports both magnetic and optical probe technologies

• Seamless integration into 3500 Series racks

• Critical for advanced monitoring: order tracking, phase analysis, tachometry

• Designed for continuous, high-reliability industrial environments

Application

This module is used to generate reliable phase reference signals in rotating machinery monitoring systems. Common application roles include:

• Synchronizing vibration signals with shaft rotation for diagnostic accuracy

• Providing tachometer input for speed measurement and trip logic

• Enabling advanced monitoring such as spectrum analysis and order tracking

• Supporting redundant Keyphasor probe configurations for high-availability systems

• Integrating timing reference into predictive maintenance frameworks

Typical Applications

• Gas turbines and steam turbines in power generation

• Centrifugal and reciprocating compressors

• Industrial pumps and critical process motors

• Steel and mining plant machinery with high-speed rotating shafts

• Oil & gas process equipment requiring precise timing reference

FAQ

Q1: What is the role of the 3500/25 module?
It generates phase reference signals that synchronize vibration data with shaft rotation.

Q2: How many channels does it support?
It supports two channels for redundant Keyphasor probe input.

Q3: Is it compatible with magnetic and optical probes?
Yes, it supports both probe types.

Q4: Which industries use the 3500/25?
Power generation, oil & gas, mining, steel, petrochemical, and general industrial sectors.