3500/42-04-02 Bently Nevada Proximitor Monitor I/O Module

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

Product Introduction

The 3500/42-04-02 from Bently Nevada offers reliable machine monitoring. This Proximitor Seismic Monitor handles up to four input channels. You can connect proximity probes or accelerometers directly. The module comes with internal terminations and barriers. Therefore, it suits hazardous locations like Zone 2. Many industries use it for vibration and position monitoring. Turbines, compressors, and fans benefit from its high accuracy.

Additionally, this Bently Nevada 3500/42-04-02 provides buffered transducer outputs. Each channel has a front-panel coaxial connector. The recorder outputs deliver +4 to +20 mA signals. These signals are proportional to the full-scale value. The module also communicates with other 3500 rack modules. LED indicators show OK, TX/RX, and Bypass status. Consequently, troubleshooting becomes faster and easier.

Technical Specifications

The 3500/42-04-02 offers precise signal conditioning. Below are the key parameters.

• Input Channels: 1 to 4, programmable

• Transducer Types: Proximity, velocity, or acceleration

• Input Impedance: 10 kΩ (standard I/O)

• Sensitivity Options:

  • Radial Vibration: 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil)

  • Acceleration: 10 mV/(m/s²) (100 mV/g)

• Power Consumption: 7.7 watts typical

• Recorder Outputs: +4 to +20 mA, load 0–600 Ω

• Output Impedance (buffered): 550 Ω

• Transducer Supply: -24 Vdc

• Resolution: 0.3662 µA per bit

• Accuracy: ±0.33% of full scale typical, ±1% max

Furthermore, the frequency response varies by measurement type. For radial vibration, the direct filter reaches -3 dB from 4 Hz to 4000 Hz. The gap filter is -3 dB at 0.09 Hz. For acceleration, both high-pass and low-pass filters use 4-pole designs. This ensures reliable data under different machine speeds.

Hazardous Area Approval

Option 02 means ATEX, IECEx, and CSA approval. This applies to Class 1, Zone 2 locations. Option B02 is only available with A04, A05, A06, and A09. Therefore, always check your I/O configuration before ordering. The internal barriers simplify installation. You do not need external zener barriers for most sensors.

Mechanical and Environmental Data

• Dimensions (H x W x D): 241.3 mm x 24.4 mm x 241.8 mm (9.50 x 0.96 x 9.52 in)

• Weight: 0.91 kg (2.0 lb) for the main board

• Operating Temperature: 0 to +65°C (reference)

• Storage Temperature: -40 to +85°C

The module fits into any standard 3500 rack. Its narrow width of only 24.4 mm saves space. Multiple monitors can be installed side by side.

Installation Guidelines

First, power down the rack before inserting the 3500/42-04-02. Align the module with the card guides. Push it firmly until the front panel is flush. Then, secure the locking screws. Next, connect your proximity probes to the terminal blocks. For channels 1 to 4, set the transducer type as Prox/Accel. Use the Configuration Software to define sensitivity. After that, apply power and check the OK LED. It should turn green. Finally, verify communication via the TX/RX LED.

Meanwhile, keep the following in mind.

• Use shielded cables for all transducer connections.

• Do not exceed -24 Vdc on the transducer supply.

• Short circuits on recorder outputs will not damage the monitor.

Packaging List

• 3500/42-04-02 Proximitor Seismic Monitor (main board)

• I/O module with internal barriers and terminations

• Front panel coaxial connectors (4 pcs, pre-installed)

Note: No certificates or warranty documents are included in the package.

Shipping Information

We ship worldwide using reliable carriers.

• FedEx (priority, 3–5 business days)

• UPS (economy, 5–7 business days)

• DHL (express, 2–4 business days)

Tracking numbers are provided within 24 hours after dispatch.

Frequently Asked Questions (FAQ)

1. Can the 3500/42-04-02 measure both proximity and acceleration at the same time?
Yes. Channels 1 through 4 accept either proximity or acceleration inputs. You can mix them as needed.

2. Does this module work with Velomitor velocity sensors?
Absolutely. The Bently Nevada 3500/42-04-02 supports velocity sensors. Use the velocity or velocity II settings in the configuration.

3. What happens if the recorder output is shorted?
The monitor remains unaffected. Short circuits on recorder outputs will not damage the module. This is due to built-in protection.

4. Is an external barrier required for Zone 2 installation?
No. This I/O module includes internal barriers. It is approved for ATEX/IECEx Zone 2 without external barriers.

5. How do I know the monitor is communicating with the rack?
Watch the front panel TX/RX LED. A flashing light indicates active communication with other 3500 modules.