Product Description

Overview

The Bently Nevada 3500/25 Enhanced Keyphasor Module (149369-01) is a precision two-channel signal processing module designed for the 3500 Machinery Protection System. It converts signals from proximity probes or magnetic pickups into digital Keyphasor pulses, providing accurate timing references for shaft rotation and vibration analysis. This module is ideal for both retrofits and new installations, offering backward compatibility with older 3500/25 modules.

Key Features

Dual-Channel Signal Processing

• Accepts up to two independent input signals from transducers.

• Supports multiple events per revolution for advanced phase analysis.

Enhanced Signal Handling

• Improved signal processing compared to legacy modules.

• Maintains full backward compatibility in form, fit, and function.

Flexible Input Options

• Compatible with Proximity Probes and Passive Magnetic Pickups.

• Input impedance: 21.8 kΩ minimum.

• Non-Isolated I/O voltage range: +0.8 V to -21 V.

• Isolated I/O voltage range: +5 V to -11 V.

• Triggering modes: Auto-Threshold (≥2 V peak-to-peak) or Manual Threshold (0 to -20 Vdc).

Reliable Operation

• Operating temperature: -30°C to +65°C

• Storage temperature: -40°C to +85°C

• Power consumption: 3.2 W typical

• Front-panel LEDs indicate module health (OK) and communication status (TX/RX).

Output & Connectivity

• Provides buffered Keyphasor signals via front coaxial and rear Euro-style connectors.

• Supports system expansion: up to 8 Keyphasor signals using paired modules.

Technical Specifications

Applications

• Shaft speed and phase monitoring in rotating machinery.

• Vector vibration analysis for high-speed or multi-axis equipment.

• Retrofits for legacy Bently Nevada 3500/25 systems.

• Triple Module Redundancy (TMR) applications requiring primary and auxiliary Keyphasor outputs.

FAQ

Q: Can the 3500/25 module support more than four Keyphasor signals?
A: Yes. Using paired modules, a single rack can process up to eight Keyphasor inputs.

Q: Is it compatible with older 3500/25 modules?
A: Fully. The 149369-01 is backward-compatible, replacing legacy PWA 125792-01 without modifications.

Q: Can it operate in extreme industrial environments?
A: Yes. With wide temperature and humidity tolerance, it ensures stable operation under harsh conditions.