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Product Overview
The Bently Nevada 3500/42M Proximitor Seismic Monitor is a 4-channel monitoring module designed for high-performance machinery protection and condition monitoring. Compatible with both proximity and seismic sensors, it provides real-time measurements of vibration, position, acceleration, and shaft behavior.
Applications
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Critical rotating equipment (turbines, compressors, motors)
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Predictive maintenance systems
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High-speed machinery requiring real-time vibration diagnostics
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Industrial process environments (oil & gas, power generation, petrochemical)
Key Advantages
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Simultaneous processing of proximity and seismic signals
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User-configurable channel pairing with dual-function monitoring
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High accuracy across a broad frequency range (3 Hz to 30 kHz)
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Built-in alarming and recorder outputs for control system integration
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Certified for use in hazardous areas (Class I, Div 2 / ATEX Zone 2)
Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | 3500/42M Proximitor Seismic Monitor |
| Input Channels | 4 channels (proximity/seismic) |
| Signal Inputs | Proximitor, Velomitor, Acceleration, Seismoprobe |
| Input Impedance | 10 kΩ (Proximitor and acceleration) |
| Output Signal (Recorder) | 4–20 mA, update ≤100 ms |
| Buffered Output | Coaxial, short-circuit protected |
| Frequency Response Range | 3 Hz to 30,000 Hz (depending on signal type) |
| Alarm Configuration | 0–100% full scale; alert & danger setpoints per channel |
| Alarm Accuracy | ±0.13% of desired value |
| Power Consumption | 7.7 W typical |
| Operating Temperature | -30°C to +65°C (w/o barriers), 0°C to +65°C (with barriers) |
| Humidity | 95% non-condensing |
| Compliance | FCC, CE (EN 61000-6-x, EN 61010-1), RoHS, ABS, DNV |
| Hazardous Area Approvals | ATEX, IECEx, CSA, cNRTLus |
| Module Dimensions (H x W x D) | 241.3 x 24.4 x 241.8 mm |
| Module Weight | 0.91 kg |
Frequently Asked Questions (FAQ)
Q1: What transducer types are supported by the 3500/42M?
A1: The monitor supports proximity probes, Velomitor velocity sensors, and accelerometers.
Q2: Can the 3500/42M handle mixed signal types on different channels?
A2: Yes, channels can be independently configured to support different functions and signal types.
Q3: How are alarms managed on the 3500/42M?
A3: Each channel supports configurable alert and danger setpoints with adjustable delays for each.
Q4: Is the 3500/42M certified for hazardous locations?
A4: Yes, it holds cNRTLus, ATEX, and IECEx certifications for use in Zone 2 / Div 2 environments.
Q5: What is the update rate for analog outputs?
A5: The 4–20 mA recorder outputs update at approximately 100 ms or less.
Q6: How accurate are the vibration measurements?
A6: Measurement accuracy is typically within ±0.33% of full scale, with a maximum of ±1%.
Q7: What is the power requirement of the unit?
A7: The monitor typically consumes 7.7 watts.
Q8: Can this monitor detect shaft eccentricity and thrust position?
A8: Yes, both parameters are supported via specific sensor configurations.
Q9: Is the unit capable of detecting REBAM (Rolling Element Bearing Analysis Method)?
A9: Yes, REBAM measurements including spike, rotor, and element frequencies are supported.
Q10: Can the 3500/42M operate in marine applications?
A10: Yes, it complies with ABS and DNV maritime standards.
Related Models in the Same Series
| Model Number | Description | Dimensions (mm) | Weight |
|---|---|---|---|
| 3500/42M-01-00 | Proximitor Seismic Monitor, standard I/O | 241.3 × 24.4 × 241.8 | 0.91 kg |
| 3500/42M-02-00 | Monitor with external terminations | 241.3 × 24.4 × 241.8 | 0.91 kg |
| 135489-02 | I/O Module (2x Prox, 2x Velomitor) with barriers | 241.3 × 24.4 × 241.8 | 0.91 kg |
| 135489-03 | I/O Module (4x Velomitor) with barriers | 241.3 × 24.4 × 241.8 | 0.91 kg |
| 138708-01 | Shaft Absolute I/O Module (internal) | 241.3 × 24.4 × 163.1 | 0.46 kg |
| 128229-01 | Prox/Seismic I/O Module (internal terminations) | 241.3 × 24.4 × 99.1 | 0.20 kg |
Popular Models from Bently Nevada
| Model Number | Description | Dimensions (mm) | Weight |
|---|---|---|---|
| 3500/22M | Transient Data Interface Module | 241.3 × 24.4 × 241.8 | 0.91 kg |
| 3500/20 | Rack Interface Module | 241.3 × 24.4 × 241.8 | 0.91 kg |
| 3500/25 | Keyphasor Module | 241.3 × 24.4 × 241.8 | 0.91 kg |
| 3500/32M | 4-Channel Relay Module | 241.3 × 24.4 × 241.8 | 0.91 kg |
| 3500/93 | LCD Display Module | 241.3 × 24.4 × 241.8 | 0.91 kg |
| 330104-00-05-10-02-00 | XL 8 mm Proximity Probe | 81.3 × 16.3 × 16.3 | 0.10 kg |
