Bently Nevada 3500/42M Proximitor Seismic Monitor – 140734-02 Vibration Module

Product Overview

• Bently Nevada 3500/42m monitors vibration and position.
• Accepts 1 to 4 proximity, velocity or acceleration signals.
• True RMS seismic monitoring with programmable filters.
• Front OK, TX/RX, Bypass LEDs for instant status.
• Typical power: 7.7 W. Weight: 0.91 kg (2.0 lb).
• Made in U.S.A, rugged 3500 rack compatible.

Technical Specifications

• Brand & Model: Bently Nevada 3500/42m (Product No. 140734-02).
• Input impedance: 10 kΩ (Proximitor / acceleration).
• Sensitivity (selectable):
  • Radial/Thrust/Eccentricity: 3.94 or 7.87 mV/µm (100/200 mV/mil).
  • Differential Expansion: 0.394/0.787 mV/µm (10/20 mV/mil).
  • REBAM: 40 or 80 mV/µm (1000/2000 mV/mil).
  • Acceleration: 10 mV/(m/s²) (100 mV/g).
  • Velocity: 20, 5.8 or 4 mV/(mm/s) pk.
• Frequency response:
  • Radial direct: 4 Hz – 4 kHz or 1 Hz – 600 Hz (±1%).
  • Gap filter: –3 dB at 0.09 Hz (radial).
  • Thrust/Eccentricity direct: –3 dB at 1.2 Hz / 15.6 Hz.
  • Acceleration: 4‑pole HP/LP filters.
• Accuracy:
  • Direct, Gap, 1X, 2X: ±0.33% typical, ±1% max.
  • Smax: ±5% max; Not‑1X: ±3% (<30k cpm).
  • Recorder output resolution: 0.3662 µA/bit.
  • Recorder error: ±0.25% (25°C), ±0.7% over temp.
• Outputs & Protection:
  • Buffered transducer out: 550 Ω, short‑circuit protected.
  • Shaft absolute out: 300 Ω, protected.
  • Recorder: 4‑20 mA, 0‑600 Ω load, 0‑12 V compliance.
  • Transducer power: –24 Vdc.
• Physical: 241.3 x 24.4 x 241.8 mm, 0.91 kg.

Configuration & Suffix Breakdown

• 3500/42M Main Board (140734-02)
  • I/O Module Options:
    • 4‑Channel Proximitor I/O – part 125792-01.
    • 2‑Channel Seismic I/O – part 125768-01.
    • Shaft Absolute I/O – part 125840-02.
  • Firmware: Rev. F (latest).
  • Rack position: Full‑size 3500 slot.
• Suffix example: 140734-02 = monitor with standard I/O.
• Custom configurations available via sales@powergearx.com.

Installation & Maintenance

• Quick installation: Hot‑swappable module, no rack power down.
• Front access: Buffered coaxial outputs per channel.
• Self‑test: OK LED verifies proper operation.
• Bypass mode: Isolate channel without trip.
• Software: 3500 Framework configuration, drag‑drop.
• Maintenance: No internal fuses, all settings stored in non‑volatile memory.

Compatibility & Certifications

• Rack compatibility: 3500 chassis, all versions.
• Transducer compatible: Bently Nevada Proximitor, Velomitor, accelerometers.
• Certifications: CE, UL listed, CSA, ATEX (when installed in proper enclosure).
• EMI immunity: Exceeds IEC 61000‑4‑3, industrial environment.

Packaging, Warranty & Shipping

• Box includes: 1x 3500/42m monitor, 1x quick start guide, ESD bag.
• Warranty: 12 months from invoice date, parts and labor.
• Shipping carriers: FedEx, UPS, DHL – express worldwide.
• Tracking number sent within 24h.

Applications & Diagnostics

• Typical use: Steam/gas turbines, compressors, gearboxes, fans.
• Diagnostics:
  • Radial vibration, thrust position, eccentricity, differential expansion.
  • Shaft absolute vibration, REBAM, acceleration, velocity.
  • 1X/2X vector filters, Smax, Not‑1X notch filter.
• Continuous self‑monitoring; relay trip integration.

Frequently Asked Questions

• Q: How many channels does the 140734-02 support?
  A: It supports up to 4 channels, mix proximity and seismic.
• Q: Can I use this module with old Proximitor probes?
  A: Yes, it works with all 5/8mm and 8mm Bently Nevada Proximitors.
• Q: What is the typical full scale for radial vibration?
  A: Programmable from 100 µm to 500 µm (4‑20 mA output).
• Q: Does it provide buffered output?
  A: Yes, each channel has coaxial buffered output (550 Ω).
• Q: Which I/O module should I choose for acceleration?
  A: Use 2‑Channel Seismic I/O (125768-01) for accelerometers.
• Q: Do you offer volume discounts?
  A: Yes, contact us for bulk pricing.
• Q: How to order the correct suffix?
  A: Provide your transducer type and channel count – we pre‑configure.

Contact & Inquiries

• Email: sales@powergearx.com
• WhatsApp: +86 180 3000 5825
• Response within 4 business hours.
• Need configuration help? We provide free technical pre‑sales.

📌 All 3500/42M links: view full series – cross‑checked inventory.

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