3500/25-01-05-01 Bently Nevada Dual Channel Keyphasor

Product Overview

The Bently Nevada 3500/25-01-05-01 serves as an Enhanced Keyphasor* Module within the 3500 Machinery Protection System. This half-height module provides critical phase reference and shaft speed data by processing raw signals from proximity probes or magnetic pickups. It generates precise timing pulses used for synchronous vibration measurements, vector analysis, and rotational diagnostics. We supply this unit as 100% Brand New and Original in Factory Packaging, ensuring absolute signal integrity for your most critical turbomachinery assets.

Technical Specifications

The 3500/25-01-05-01 executes high-speed signal processing to maintain phase accuracy across a wide range of rotational frequencies.

Engineering Advantages

• Precision Synchronous Sampling: The 3500/25-01-05-01 provides the "once-per-turn" timing marker essential for Orbit, Polar, and Bode plots. This allows diagnostic software to distinguish between mechanical unbalance and other vibration-related faults.

• Enhanced Noise Suppression: This module incorporates advanced digital filtering and programmable hysteresis. It rejects "ghost" pulses and electrical noise, ensuring a clean phase reference even when the shaft surface has minor imperfections or the environment has high EMI.

• Dynamic Speed Tracking: The module tracks instantaneous speed changes with millisecond resolution. It facilitates overspeed and underspeed protection by communicating alarm states across the 3500 rack backplane.

• Redundant Input Configuration: The dual-channel architecture supports two independent Keyphasor probes. This ensures the 3500 system maintains a stable phase reference if a primary probe or cable fails, preventing a loss of diagnostic capability.

• Flexible I/O Termination: The "-05" option utilizes an I/O module designed for external terminations. This setup allows for easier field wiring management and cleaner cabinet integration in complex monitoring racks.

FAQs

• What is the primary role of the 3500/25-01-05-01 module?

  It provides the master phase reference and speed data for the entire 3500 rack. All vibration modules in the rack use the pulses generated by this module to calculate phase angles and perform synchronous data sampling.

• Can I use this module for overspeed protection?

  While the 3500/25 provides speed data and alarms, it is typically used for machinery protection and diagnostics. For dedicated emergency overspeed shutdown, Bently Nevada often recommends specialized modules like the 3500/53.

• Is this module hot-swappable?

  Yes. You can replace the 3500/25 while the system is powered. Note that removing the module will temporarily suspend synchronous vibration monitoring and phase data for all other modules in the rack until the new module is initialized.

• Does it accept inputs from magnetic pickups?

  Yes. The 3500/25-01-05-01 is compatible with both non-contact proximity probes (eddy current) and passive magnetic pickups, providing versatile installation options for different machine types.