Description

Product Description

The Bently Nevada 3500/40-02-01 Proximitor Monitor is a four-channel measurement module designed for the 3500 Machinery Protection System. It processes input signals from proximity probes and converts them into precise mechanical condition data for rotating equipment protection and performance monitoring.

This module is typically deployed in critical machinery systems where continuous evaluation of shaft behavior is required, including vibration, axial movement, and dynamic displacement measurements. The “02-01” configuration uses a rear I/O termination design that simplifies field wiring and supports easier maintenance access.

Measurement Capabilities

Each channel independently processes proximity probe inputs to provide multiple machine condition parameters:

• Radial vibration monitoring

• Axial thrust position measurement

• Shaft eccentricity detection

• Differential expansion tracking

• REBAM (Relative Expansion Bending and Alignment Monitoring)

Supports 1 to 4 probe inputs per module with channel-level configuration flexibility.

Signal Conditioning & Filtering

The module incorporates advanced digital signal processing to ensure measurement stability and accuracy:

• Programmable direct filtering: 4 Hz to 4000 Hz or 4 Hz to 600 Hz

• Gap filtering: –3 dB cutoff at 0.09 Hz

• Not-1X filtering: 60 cpm to 15.8× running speed

• 1X / 2X vector filters: Constant-Q design with –57.7 dB rejection

• Smax filtering range: 0.125 to 15.8× running speed

These filtering options enable accurate separation of operating speed components and transient vibration events.

Electrical Performance

• Typical Power Consumption: 7.7 W

• Transducer Supply: –24 VDC excitation

• Input Impedance: 10 kΩ (standard configuration)

• Buffered Outputs: One per channel via coaxial connector

• Output Protection: Short-circuit protected signal outputs

• Output Impedance: 550 Ω

System Outputs & Interfaces

• Real-time buffered vibration signals available per channel

• Compatible with Bently Nevada 3500 rack architecture

• Supports external termination via rear I/O module (02-01 configuration)

• Hot-swappable I/O module design for maintenance without system shutdown

• Integrated rack communication via TX/RX backplane interface

Front Panel Indicators

• OK LED: Indicates module health status

• TX/RX LED: Displays rack communication activity

• BYPASS LED: Indicates bypass operation mode

Mechanical Data

Monitor Module

• Dimensions: 241 × 24.4 × 242 mm

• Weight: 0.91 kg

I/O Module (02-01 External Termination)

• Dimensions: 241 × 24.4 × 99.1 mm

• Weight: 0.4 kg

Installation

• Rear rack-mounted I/O configuration

• Designed for modular integration within 3500 system chassis

Environmental Specifications

• Operating Temperature: –30°C to +65°C

• Storage Temperature: –40°C to +85°C

• Humidity: 0–95% non-condensing

• Designed for high-vibration and electrically noisy industrial environments

Application Areas

• Gas and steam turbine shaft monitoring

• Centrifugal compressor vibration protection

• Pump radial and axial displacement monitoring

• Power generation rotating machinery diagnostics

• Oil & gas process equipment condition monitoring

FAQ

Q1: What does the 02-01 configuration indicate?
It refers to an external termination I/O design that simplifies wiring and supports easier field maintenance.

Q2: How many channels are supported?
The module supports four independent proximity probe channels.

Q3: Can the I/O module be replaced without shutdown?
Yes, the design supports hot-swappable I/O modules for maintenance continuity.

Specifications

• Brand: Bently Nevada

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems