Description

The Bently Nevada 125800-01 is a Keyphasor I/O module designed for use with the 3500/25 Enhanced Keyphasor Module. This module features internal terminations and provides the critical interface between Keyphasor transducers (such as proximity probes or magnetic pickups) and the 3500 monitoring system. It is a non-isolated I/O module, intended for applications where signal isolation from control systems or other parallel-connected devices is not required. The 125800-01 ensures a direct electrical path for high-speed pulse signals, which are essential for phase measurement and vibration analysis.

Features

• Half-height module form factor
• Two-channel input configuration
• Compatible with proximity probes or magnetic pickups
• Includes buffered transducer outputs for each channel to facilitate connection of portable diagnostic equipment
• Provides -24 Vdc power to transducers

Applications

• Turbine and generator monitoring
• Pump and motor vibration analysis
• Gearbox monitoring for lubrication and friction detection
• Industrial fan and blower speed monitoring
• General rotating machinery protection systems

Technical Specifications

Installation Guidelines

• Ensure the 3500 rack power is switched OFF before attempting to install or remove any module.
• Verify the area is safe and non-hazardous before performing maintenance.
• Align the I/O module carefully with the top and bottom guides of the designated rear rack slot.
• Slide the module firmly into the slot until the rear connector fully mates with the rack backplane.
• Ensure all field wiring is properly secured to the internal terminals to prevent signal degradation or intermittent connections.

FAQ

What is the primary function of the 125800-01?

The 125800-01 acts as an interface module that receives raw pulses from Keyphasor transducers, converting them into digital signals for the 3500 monitoring system to perform phase and RPM calculations.

Can I connect test equipment to this module?

Yes, the module includes buffered transducer outputs for each channel, allowing you to connect portable test equipment or diagnostic instruments without interrupting the primary signal path to the monitoring system.

What is the operating temperature range?

The module is rated for operation between 0 degC and +65 degC.