Product Description

Overview

The Bently Nevada 3500/42M Proximitor/Seismic Monitor (176449-02) is a high-performance four-channel vibration monitoring module designed for the 3500 Machinery Protection System. This module provides real-time analysis of proximity and seismic sensor signals, delivering precise vibration and position measurements. It is widely used for monitoring critical rotating machinery, offering both flexibility and advanced protection features in a single module.

Core Features

Four-Channel Multimode Monitoring

• Supports four independent sensors, programmable per channel for specific monitoring requirements.

• Monitors radial vibration, thrust position, shaft eccentricity, differential expansion, and seismic/velocity data.

Advanced Signal Processing

• Wide frequency response up to 30 kHz, configurable per measurement type.

• High accuracy within ±0.33% of full-scale range.

• Provides stable -24 VDC power to connected transducers for consistent sensor performance.

Input and Output Flexibility

• Accepts velocity, acceleration, displacement, proximity, speed, and torque signals.

• Analog outputs: +4 to +20 mA proportional signals for DCS or PLC integration.

• Buffered front-panel outputs allow connection to portable data collectors or oscilloscopes.

• RS-485 interface for digital data communication and remote monitoring.

Robust Physical and Environmental Performance

Key Innovations

The "M" in 3500/42M indicates Multimode, reflecting its ability to perform multiple monitoring functions within a single module. The 176449-02 board is an enhanced version that provides improved signal stability, wider transducer compatibility, and advanced diagnostic capabilities compared to legacy models. Front-panel LEDs provide instant health and communication status for rapid troubleshooting.

Applications

• Shaft vibration and axial position monitoring in turbines, compressors, and pumps.

• Thermal growth and differential expansion analysis in critical rotating equipment.

• Seismic monitoring of machinery casing vibrations for predictive maintenance.

• Suitable for both new installations and retrofits in existing 3500 racks.

FAQ

Q: Can the 3500/42M module handle multiple sensor types?
A: Yes. Each channel can be configured for proximity probes, accelerometers, velocity sensors, or other compatible transducers.

Q: How precise is the vibration measurement?
A: Accuracy is typically within ±0.33% of full-scale, with user-programmable frequency response up to 30 kHz.

Q: Is it compatible with legacy 3500/42 monitors?
A: Fully. The 176449-02 is backward-compatible, making it an easy upgrade path.