Bently Nevada 3500/25 Enhanced Keyphasor

The Bently Nevada 3500/25 Enhanced Phase Comparator Module is a half-height, dual-channel module designed to provide phase comparator signals to the monitor module within the 3500 rack. It supports precise timing measurement and vibration monitoring, and features enhanced signal processing capabilities and high compatibility.
Core Function
Phase Comparator Signal Conversion
Receive input signals from proximity probes or magnetic pickups and convert them into digital phase comparator signals, indicating the moment when the phase marks on the shaft align with the sensor.
Phase comparator signals are pulses generated by the rotating shaft or gears for precise timing detection.
Multi-Signal Support
Standard Configuration: The 3500 mechanical protection system can accept up to 4 phase comparator signals.
Paired Configuration: By monitoring two consecutive positions (such as upper/lower slots or two half-slots), up to 8 phase comparator signals can be accepted.
Each module can accept up to 2 sensor signals (from proximity probes or magnetic pickups).
Redundant Design
In triple-module redundancy (TMR) applications, two phase comparator modules need to operate in parallel to provide primary and auxiliary phase signal inputs for other modules in the rack.

Configuration flexibility
Module combination
Supports a configuration of 2 coupled modules + 1 non-coupled module, meeting diverse needs.
Users can achieve flexible deployment by ordering different channel options (such as two 2-channel or one 1-channel + one 2-channel).
Isolated I/O module
Suitable for scenarios where multiple devices need to connect key signals simultaneously, or where isolation from other systems (such as control systems) is required.
The main objective is to measure shaft speed, while also supporting phase measurement (but introducing a slightly larger phase shift)

Application scenario
Rotating machinery monitoring
Vibration monitoring and shaft speed measurement for key equipment such as turbines, generators, compressors, etc.
Supports measurement of vector characteristics such as 1X vibration amplitude and phase, facilitating fault diagnosis.
Industrial process control
Applicable to factory automation, intelligent networked PLC controllers, data acquisition, etc.
Provides precise timing signals and supports synchronous sampling and phase reference.
High reliability requirements
Ensures long-term stable operation of equipment in marine and offshore industrial facilities (such as mines, paper mills, petrochemical plants).

Spares

149369-01 Enhanced Keyphasor Module (Note: This module may be ordered as a direct plug-in replacement for Keyphasor Module 125792-01.)

125800-01 Keyphasor I/O Module (Internal Terminations)

126648-01 Keyphasor I/O Module (External Terminations)

125800-02 Isolated Keyphasor I/O Module (Internal Terminations) (Designed for use with Magnetic Pickups)

126648-02 Isolated Keyphasor I/O Module (External Terminations) (Designed for use with Magnetic Pickups)

135473-01 Keyphasor I/O Module (Internal Barriers and Internal Terminations.

04425545 Grounding Wrist Strap (single use)

00580438 Connector Header, Internal Termination, 4-Position, Green

00502133 Connector Header, Internal Termination, 12-Position, Blue

129770-01 Keyphasor Module Manual

Half-height Card Adaptor:

125388-01 Half-height Chassis

125565-01 Card Guide

04300111 Assembly Screws (Order Qty. 3)

External Termination Blocks

128718-01 Keyphasor External Termination Block (Euro Style Connectors)

128726-01 Keyphasor External Termination Block (Terminal Strip Connectors)