Product Overview

The Bently Nevada 3500/25 (Part Number 3500/25-01-01-00) acts as the specialized phase reference center for the 3500 Machinery Protection System. This half-height module accepts signals from proximity probes or magnetic pickups to determine the rotational position of a shaft. It processes these raw inputs into conditioned Keyphasor signals and distributes them to other monitor modules within the rack backplane. This synchronization enables advanced diagnostic functions, including filtered vibration measurements, orbit plots, and precise speed tracking. We supply this unit as 100% Brand New and Original in Factory Packing.

Part Number Breakdown: 3500/25-AA-BB-CC

Technical Specifications

Engineering Advantages

• Precision Phase Synchronization: The 3500/25 provides a high-accuracy timing pulse that synchronizes vibration data with the mechanical rotation of the shaft. This allows engineers to identify phase-related faults such as unbalance, misalignment, and mechanical looseness.

• High-Frequency Processing: With a frequency range reaching 60 kHz, the module supports ultra-high-speed assets, including gas turbines and centrifugal compressors. It maintains signal integrity and pulse accuracy even at maximum rotational velocities.

• Redundant Configuration Support: The dual-channel architecture allows for redundant Keyphasor inputs. If one sensor fails, the system can automatically utilize the second channel to maintain continuous phase reference and prevent a loss of diagnostic data.

• Internal Termination Efficiency: The 01 I/O option features internal terminations, allowing for direct field wiring to the rear of the rack. This eliminates the need for external terminal blocks, reducing cabinet complexity and potential signal interference points.

• Backplane Signal Distribution: Once the module conditions the input signal, it places the Keyphasor pulse on the 3500 rack backplane. Every vibration, position, and speed monitor in the rack accesses this pulse simultaneously, ensuring system-wide timing consistency.

FAQs

• What is the difference between a standard Keyphasor and the "Enhanced" version?

  The Enhanced 3500/25 module offers improved signal processing, higher frequency capabilities (up to 60 kHz), and greater flexibility in accepting a wider range of input voltages compared to older legacy versions.

• Can I use this module for overspeed protection?

  While the 3500/25 measures speed and provides phase reference, dedicated overspeed protection usually requires the 3500/53 Electronic Overspeed Detection System. However, the 3500/25 frequently provides the speed data used for secondary monitoring and alarm logic.

• Does this module occupy a full-height or half-height slot?

  The 3500/25 is a half-height module. It requires a 3500 half-height rack slot. If you install it in a full-height slot, you must use a specialized mounting chassis designed for half-height modules.

• How do I configure the threshold voltage for the pulse?

  You set the trigger thresholds and hysteresis values using the Bently Nevada 3500 Rack Configuration Software. This allows you to fine-tune the module to ignore signal noise and only trigger on the actual Keyphasor notch or event.