Bently Nevada 3500/40M-01-00 Proximitor Monitor

Bently Nevada 3500/40M-01-00 Proximitor Monitor for Multi-Channel Protection

Product Introduction

The 3500/40M-01-00 from Bently Nevada provides reliable proximity monitoring for rotating machinery. This Proximitor monitor accepts between one and four proximity transducer signals per module. You can configure each channel for different measurement types.

Common applications include radial vibration monitoring, thrust position measurement, and shaft eccentricity tracking. The module also supports differential expansion and REBAM (Rolling Element Bearing Activity Monitoring). This flexibility makes the 3500/40M ideal for comprehensive machine protection.

Additionally, this version uses I/O module type 01. This provides internal terminations for easy wiring. Agency approval option 00 means this unit has no hazardous area certifications.

Input Specifications and Power Requirements

The 3500/40M-01-00 provides a transducer power supply of -24 Vdc for your proximity probes. Input impedance measures 10 kΩ for both Proximitor and acceleration inputs. Typical power consumption runs at 7.7 watts.

Each channel includes a buffered transducer output on the front panel. These outputs use coaxial connectors. Every connector is short-circuit protected for added safety. Output impedance measures 550 Ω.

Frequency Response and Filter Options

The 3500/40M-01-00 includes multiple user-programmable filters. The direct filter offers a single-pole response at either 4 Hz to 4000 Hz or 1 Hz to 600 Hz. The gap filter provides a -3 dB point at 0.09 Hz.

For advanced analysis, the Not 1X filter covers 60 cpm to 15.8 times running speed. It delivers a minimum rejection in the stopband of -34.9 dB. The Smax filter operates from 0.125 to 15.8 times running speed.

Furthermore, the 1X and 2X vector filter uses a constant Q design. It achieves a minimum rejection in the stopband of -57.7 dB. These filters help isolate specific vibration components for accurate diagnosis.

Measurement Accuracy

Accuracy varies by measurement type and filter selection. For direct and gap measurements, accuracy stays within ±0.33% of full-scale typical, with a maximum of ±1%. The same accuracy applies to 1X, 2X, thrust, and differential expansion measurements.

For Smax measurements, accuracy reaches ±5% maximum. Not 1X accuracy depends on machine speed. Below 30,000 cpm, accuracy is ±3%. Above 30,000 cpm, accuracy is ±8.5%.

Eccentricity measurements also achieve ±0.33% of full-scale typical, with ±1% maximum. The direct filter for eccentricity has a -3 dB point at 15.6 Hz. The gap filter for eccentricity is -3 dB at 0.41 Hz.

Front Panel Status Indicators

The front panel includes several LEDs for quick status checks. The OK LED indicates when the 3500/40M Proximitor is operating properly. The TX/RX LED shows communication activity with other modules in the 3500 rack.

Additionally, the Bypass LED lights up when the module is in Bypass Mode. These indicators help you diagnose module status without opening the rack or connecting a computer.

Physical Specifications and Rack Space

The monitor module (main board) measures 241.3 mm x 24.4 mm x 241.8 mm. It weighs 0.91 kg. This module requires one full-height front slot in the 3500 rack.

The I/O module for 3500/40M-01-00 includes internal terminations. It measures 241.3 mm x 24.4 mm x 99.1 mm and weighs 0.20 kg. This I/O module occupies one full-height rear slot.

For barrier I/O modules (not included in this version), the depth increases to 163.1 mm and weight rises to 0.46 kg. Always verify your I/O module type before installation.

Installation Guidelines

First, power down the 3500 rack before inserting the 3500/40M-01-00 monitor module. Next, install the monitor module in a full-height front slot. Then, install the I/O module in the corresponding rear slot.

Connect your proximity transducers to the internal termination block. Secure all wiring according to the installation manual. Each channel requires proper sensitivity and filter configuration.

Finally, power up the system and use the 3500 configuration software to set up each channel. Select the correct measurement type, sensitivity, and filter options for your application.

Packaging List

• 1 x 3500/40M-01-00 Monitor Module (Proximitor main board)

• 1 x I/O module with internal terminations (type 01)

• 4 x Coaxial connectors for buffered transducer outputs

• 1 x Internal termination block

• 1 x Quick start guide

Shipping via Fedex, UPS, or DHL

Frequently Asked Questions (FAQ)

1. How many transducers can I connect to the 3500/40M-01-00?
The 3500/40M-01-00 accepts between one and four proximity transducer signals. Each channel operates independently with its own configuration.

2. What measurement types does this Proximitor monitor support?
This module supports radial vibration, thrust position, eccentricity, differential expansion, and REBAM (Rolling Element Bearing Activity Monitoring). Configure each channel for your specific application.

3. What is the input impedance of the 3500/40M?
The input impedance is 10 kΩ for both Proximitor and acceleration inputs. This applies to the standard I/O configuration included with this version.

4. Does this module have hazardous area approvals?
No, the 3500/40M-01-00 includes agency approval option 00, which means no hazardous area certifications. For Class 1, Division 2 applications, consider version 3500/40M-01-01 instead.

5. Are the buffered transducer outputs short-circuit protected?
Yes, every coaxial connector on the front panel is short-circuit protected. Output impedance is 550 Ω for all buffered outputs.