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Product Introduction
The Bently Nevada 3500/40M Proximitor Monitor is an advanced machinery protection module designed to provide precise measurement and monitoring of shaft displacement in rotating equipment. This module is a part of the 3500 Series monitoring system and works in conjunction with Proximitor probes to deliver high-fidelity data for vibration analysis, machinery diagnostics, and condition-based maintenance programs.
The 3500/40M module offers triple-redundant (TMR) or dual-redundant monitoring configurations to ensure continuous, reliable operation in critical industrial environments. It translates the signals from proximity probes into accurate shaft position data, enabling operators and control systems to detect misalignment, unbalance, or mechanical looseness before catastrophic failures occur.
This module is widely used in industries with high-value rotating equipment such as turbines, compressors, pumps, and generators, where early detection of machinery issues is vital to operational safety and efficiency.
Product Parameters
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Model Number | 3500/40M |
| Part Number | 176449-01+126615-01 |
| Product Type | Proximitor Monitor |
| Architecture | Triple Modular Redundant (TMR) / Dual Redundant Option |
| Input Signals | AC signal from Proximitor probes |
| Output Signals | Processed shaft position, vibration, and gap measurements |
| Number of Channels | 1–2 channels per module |
| Frequency Response | 0–10 kHz typical |
| Probe Excitation Voltage | 8–12 VDC |
| Signal Conditioning | Built-in filtering and amplification |
| LED Indicators | Channel status, fault indication, probe signal status |
| Mounting Type | Rack-mounted in 3500 Series chassis |
| Power Supply | 24 VDC via 3500 chassis backplane |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5%–95% non-condensing |
| Dimensions (W x H x D) | 241.3 x 24.4 x 241.8 mm |
| Weight | 0.91 kg |
Product Applications
The 3500/40M Proximitor Monitor is widely used for precise machinery protection and condition monitoring:
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Turbine Monitoring – Measures rotor displacement to detect misalignment, shaft bow, and vibration.
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Compressor and Pump Protection – Provides early warning for bearing wear, imbalance, or mechanical looseness.
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Generator Monitoring – Ensures critical shaft stability and protects against vibration-induced damage.
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Process Industry Applications – Integrates with oil & gas, chemical, and petrochemical plants to protect critical rotating equipment.
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Power Plants – Facilitates continuous monitoring for turbines, boilers, and auxiliary equipment.
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Rotating Equipment Diagnostics – Enables predictive maintenance programs through high-fidelity shaft position data.
Product Advantages
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High Accuracy – Provides precise shaft displacement measurements for machinery protection.
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Redundant Operation – Triple or dual redundant configurations enhance reliability in mission-critical systems.
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Fast Response – Monitors machinery behavior in real-time, supporting rapid fault detection.
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Integrated Signal Conditioning – Includes built-in amplification and filtering to optimize measurement quality.
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Diagnostic Visibility – LED indicators allow for immediate identification of probe signal integrity and module health.
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Wide Compatibility – Interfaces seamlessly with Proximitor probes and the 3500 Series monitoring system.
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Industrial-Grade Reliability – Designed for harsh environments with electrical noise, vibration, and temperature fluctuations.
FAQ
1. What types of probes are compatible with the 3500/40M module?
It is compatible with standard Bently Nevada AC Proximitor probes.
2. How many channels does the module support?
The module supports 1–2 channels per module depending on configuration.
3. What is the frequency response of the 3500/40M?
It provides a typical frequency response of 0–10 kHz, suitable for most rotating machinery applications.
4. Does the module provide redundancy for critical systems?
Yes, it supports triple modular redundancy (TMR) or dual redundancy to maintain operation during faults.
5. Can the module interface with a DCS or PLC?
Yes, the processed outputs can be routed to SCADA, PLC, or DCS systems for monitoring and control.
6. How are diagnostic indicators displayed?
LEDs show channel status, fault conditions, and probe signal integrity.
7. What excitation voltage does it provide to the probes?
It supplies an excitation voltage of 8–12 VDC to the Proximitor probes.
8. Is the module hot-swappable?
No, the module should be powered down before installation or removal to avoid potential faults.
9. What types of signals does the module output?
It outputs processed shaft position, gap measurements, and vibration information.
10. Can the 3500/40M module detect shaft misalignment or imbalance?
Yes, by continuously monitoring displacement and vibration, the module enables early detection of misalignment, imbalance, and other mechanical issues.
Recommended Related Models (Same Series)
| Model Number | Description |
|---|---|
| 3500/30 | Proximitor Monitor Module |
| 3500/32 | 4-Channel Relay Module |
| 3500/33 | Redundant 4-Channel Relay Module |
| 3500/36 | Analog Output Module |
| 3500/37 | Digital Input Module |
| 3500/38 | Velocity Transducer Monitor |
Popular Bently Nevada Models
| Model Number | Description |
|---|---|
| 3500/32 | 4-Channel Relay Module |
| 3500/33 | Redundant Relay Module |
| 3500/34 | TMR Relay Module |
| 3500/01 | Proximity Probe Monitor Module |
| 3300/20 | Shaft Position Transducer |
| 3500/05 | Velocity Transducer Monitor |
