Bently Nevada 3500/42-04-02 3500 Series Proximitor Seismic Monitor

Product Overview – Bently Nevada 3500/42-04-02 Proximitor Seismic Monitor

• Brand: Bently Nevada
• Model: 3500/42-04-02
• Series: 3500 Machinery Protection System
• Manufactured in U.S.A

• 4-channel vibration and position monitoring
• Supports proximity, velocity, and acceleration signals
• Internal barriers and internal terminations included
• Designed for critical rotating machinery
• ATEX / IECEx / CSA Zone 2 certified
• Typical power consumption: 7.7 W

The 3500/42M Proximitor Seismic Monitor provides reliable machine protection.
>It combines vibration and position monitoring in one module.
>It supports high accuracy measurement for turbines and compressors.
>It fits standard 3500 racks without modification.

Configuration Breakdown

• 3500/42 – A04 – B02

• A04
  • I/O module with internal barriers
  • Internal terminations
  • 4 × Prox/Accel inputs
• B02
  • ATEX / IECEx / CSA Class 1, Zone 2 approval
  • Available only with A04, A05, A06, A09

Technical Specifications

• Brand: Bently Nevada
• Model: 3500/42-04-02
• Input channels: 1 to 4
• Input impedance: 10 kΩ
• Transducer power supply: -24 Vdc
• Recorder output: 4–20 mA
• Output load: 0–600 Ω
• Resolution: 0.3662 µA per bit
• Update rate: ≤100 ms
• Buffered output impedance: 550 Ω
• Dimensions: 241.3 × 24.4 × 241.8 mm
• Weight: 0.91 kg

• Accuracy: ±0.33% typical
• Maximum error: ±1%
• Velocity accuracy with barrier: +1% / -3%
• Velomitor accuracy: ±1% to ±3%

• Radial vibration: 4 Hz to 4000 Hz
• Gap filter: -3 dB at 0.09 Hz
• Acceleration sensitivity: 10 mV per m/s²
• Velocity sensitivity: 20 mV per mm/s peak
• High-pass filter: 4-pole, 80 dB per decade
• Low-pass filter: 2 or 4-pole design

• Short-circuit protected outputs
• Stable under EMI conditions
• Industrial-grade temperature tolerance

Measurement Functions

• Radial vibration
• Thrust position
• Differential expansion
• Eccentricity
• Shaft absolute vibration
• Acceleration and velocity
• 1X and 2X vector filtering
• Not 1X and Smax filters

Installation Guidelines

• Insert into standard 3500 rack slot
• Ensure proper grounding
• Verify sensor compatibility
• Confirm hazardous area classification
• Secure terminal connections firmly

Commissioning and Maintenance

• OK LED indicates module health
• TX/RX LED confirms rack communication
• Bypass LED shows maintenance mode
• Buffered outputs support diagnostics
• No routine recalibration required

Compatibility

• Compatible with 3500 system racks
• Supports Proximitor sensors
• Supports Velomitor sensors
• Integrates with DCS via 4–20 mA output

Certifications

• ATEX
• IECEx
• CSA Class 1, Zone 2

Typical Applications

• Steam turbines
• Gas turbines
• Centrifugal compressors
• Industrial pumps
• Large motors

Diagnostic Advantages

• Early bearing fault detection
• Rotor imbalance monitoring
• Misalignment analysis
• Overspeed condition tracking

Packing List

• 1 × 3500/42-04-02 module
• Factory sealed packaging
• Product identification label

Warranty and Shipping

• 12-month warranty
• Delivery via FedEx, UPS, DHL
• Professional export packing

FAQ

• Can this module monitor vibration and position?
• Yes. It supports both proximity and seismic inputs.
• Is it approved for hazardous areas?
• Yes. Option B02 supports Zone 2 certification.
• How accurate is the module?
• Typical accuracy is ±0.33% of full scale.
• What should I confirm before purchase?
• Check I/O type, approval option, and sensor compatibility.
• Selection Advice
• Choose A04 for internal barriers.
  Select B02 for Zone 2 sites.
  Match sensitivity with machine speed range.

Contact Information

• Email: sales@powergearx.com
• WhatsApp: +86 18030005825

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