Product Introduction
The Bently Nevada 3500/42 (Part Numbers 140734-02 and 135489-01) is a 4‑Channel Displacement/Velocity/Acceleration Monitor for the 3500 Series machinery protection system. The combination consists of the main monitor module (3500/42, option 140734-02) and a matching internal termination board (135489-01) that provides screw‑terminal connections for field wiring. This monitor accepts inputs from proximity probes (eddy current), seismic transducers (velocity), and accelerometers. It conditions these signals to provide continuous monitoring of radial vibration, axial position, eccentricity, and acceleration. The module features programmable alarm setpoints (Alert and Danger), signal processing (peak‑to‑peak, RMS, etc.), and communicates with other 3500 rack modules via the internal backplane. The 140734-02 variant typically includes enhanced I/O options and diagnostic capabilities. The monitor occupies one full‑height slot in a 3500 rack.
Parameters
| Parameter | Specification |
|---|---|
| Monitor Module (3500/42) | |
| Model / Part Number | 3500/42 140734-02 |
| Product Type | 4‑Channel Displacement / Velocity / Acceleration Monitor |
| Number of Input Channels | 4 (independent, configurable) |
| Input Types | Proximity probe (3300 XL), seismic accelerometer, velocity transducer |
| Signal Conditioning | Peak‑to‑peak, zero‑to‑peak, RMS (programmable) |
| Outputs (per channel) | Buffered transducer output (BNC front panel), 4‑20 mA recorder outputs |
| Alarm Channels | Alert and Danger per channel, programmable |
| Slot Width | 1 full‑height slot in 3500 rack |
| Dimensions (W × H × D) | 24.9 × 241.3 × 218.4 mm (0.98 × 9.50 × 8.60 in) |
| Weight (monitor only) | 0.45 kg (1.0 lb) |
| Termination Board (135489-01) | |
| Part Number | 135489-01 |
| Function | Internal termination / barrier strip for field wiring |
| Connector Type | Removable screw terminals |
| Dimensions (W × H × D) | 19.0 × 76.2 × 50.8 mm (0.75 × 3.0 × 2.0 in) (approx.) |
| Weight (board only) | 0.09 kg (0.2 lb) |
| Combined Weight | 0.54 kg (1.2 lb) |
| Operating Temperature (monitor) | 0 to +65 °C (32 to +149 °F) |
| Storage Temperature | –40 to +85 °C (–40 to +185 °F) |
| Accuracy | ±0.1% of full scale |
| Certifications | CSA, ATEX, IECEx (for safe area rack installation) |
Application Scenarios
Radial Vibration Monitoring on Turbomachinery – Installed on steam turbines, gas turbines, centrifugal compressors, and large fans to measure shaft‑relative vibration (proximity probes) and casing vibration (seismic sensors), enabling detection of imbalance, misalignment, and bearing wear.
Axial (Thrust) Position Measurement – Monitors rotor axial displacement on pumps, compressors, and turbines to prevent thrust bearing overload and rotor‑stator rub.
Shaft Eccentricity and Differential Expansion – Used during start‑up and coast‑down to measure shaft bow and thermal growth in large rotating equipment, especially in power generation.
Machine Protection in Harsh Industrial Environments – Deployed in oil & gas refineries, chemical plants, steel mills, and pulp & paper facilities to provide continuous protection with programmable alarm and shutdown logic.
Integration with 3500 Rack Systems – Works alongside 3500/32 relay modules, 3500/25 Keyphasor modules, and 3500/15 power supplies to form a complete machinery protection system for critical assets.
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Quality Commitment
Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
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- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
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7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
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