Bently Nevada 3500/25-01-01-00 149369-01 Enhanced Keyphasor Module

This enhanced keyphasor module provides precise once-per-revolution timing signals for Bently Nevada 3500 monitoring systems. It processes input from proximity probes or magnetic pickups to generate accurate phase reference pulses . The module also accepts gear tooth signals to deliver multiple speed events per revolution for advanced diagnostics .

Signal Processing and Output Generation

The Bently Nevada 3500/25-01-01-00 149369-01 conditions transducer signals and outputs TTL-compatible pulses for timing and speed measurement . A comparator with an adjustable trigger level and hysteresis handles voltage thresholds from -24 V to +24 V . The module outputs a magnetic transducer signal directly without conditioning, supporting diverse sensor types . An internal constant-current supply provides a regulated 24 mA current for non-contact probes .

Technical Specifications

Speed Measurement and Gear Tooth Support

Users can configure the module to accept signals from a standard Keyphasor transducer for one pulse per revolution . For advanced speed control, the module supports gear tooth sensors, providing multiple pulses per revolution . This feature enables accurate phase measurement and order tracking of rotating machinery. An internal constant-current supply eliminates the need for a separate power supply for the probe . The module outputs a conditioned TTL pulse for the monitoring system to process .

System Integration and Application Use

This module fits into a standard full-height slot of the 3500 rack . It interfaces with proximity probes, magnetic pickups, or gear tooth sensors depending on the application . The module works with other monitor modules to provide speed and phase inputs for vibration analysis . Its accurate timing ensures reliable triggering for balance and diagnostic measurements . Applications include turbines, compressors, pumps, and other rotating equipment requiring speed and phase reference .