1. Core Technical Specifications

Module Type：3500/40M 4-Channel Dedicated Proximitor Displacement Monitor Module

System Compatibility：Bently Nevada 3500 series machinery protection rack system

Channel Configuration：4 independent non-contact displacement monitoring channels

Supported Sensors：Bently Nevada 3300XL series Proximitor eddy-current transducers

Monitoring Parameters：Radial shaft vibration, axial thrust position, rotor eccentricity, differential expansion

Setpoint Accuracy：Within 0.13% full-scale precision for ultra-accurate alarm threshold locking

Standard Sensitivity：3.94 mV/µm (100 mV/mil) / 7.87 mV/µm (200 mV/mil) configurable

Input Impedance：10 kΩ standard industrial signal input impedance

Power Consumption：7W typical low power consumption for 7×24 continuous operation

Filter Characteristics：Multi-stage professional filtering including Butterworth and Elliptic filter groups

Alarm Delay：Programmable 0.1s–60s alarm delay for filtering transient false triggers

Structure Specification：Full-height front module + full-height rear I/O module dual-slot structure

Operating Temperature：-30℃ ~ +65℃ industrial working range

Storage Temperature：-40℃ ~ +85℃

Certification：Class I Div 2, CSA, ATEX, IECEx full hazardous area compliance

2. Official Ordering Selection & Front/Rear Board Matching

Standard Ordering Model：3500/40M-AA-BB-CC

AA Code: Signal Sensitivity Mode

BB Code: Filter & Algorithm Version

CC Code: Safety Certification Grade

Front & Rear Board Official Matching List

3. Core Product Advantages

Focused purely on proximity displacement detection, the 3500/40M delivers more professional and accurate shaft monitoring performance than multi-functional hybrid modules. Its dedicated eddy-current signal conditioning circuit eliminates redundant seismic signal processing units, reducing circuit complexity and improving long-term operational stability with lower failure risks. Boasting ultra-high 0.13% setpoint accuracy, the module ensures alarm thresholds remain precise and consistent throughout long-term unit operation, effectively preventing false trips or missed alarms caused by data deviation. The multi-stage composite filtering system combines Butterworth and Elliptic filter technologies, accurately stripping environmental noise and retaining subtle shaft fault characteristics such as eccentricity and minor rubbing. Independent channel isolation design completely avoids inter-channel signal crosstalk during four-channel synchronous acquisition. Flexible programmable alarm delay and sensitivity switching functions adapt to diverse operating conditions of different rotating equipment, while intuitive front-panel LED indicators enable technicians to quickly judge module operating status, sensor faults and bypass states, greatly improving on-site troubleshooting efficiency.

4. Industrial Application Scenarios

The 3500/40M is the mainstream dedicated displacement monitoring module for high-end TSI systems, widely deployed in core equipment protection systems of power, petrochemical and heavy industrial fields. It is primarily used for full-time shaft state monitoring of large steam turbine units, accurately capturing radial vibration and axial thrust displacement changes to avoid thrust tile burnout and rotor-stator friction accidents. In petrochemical centrifugal compressors and natural gas pressurization units, the module tracks rotor eccentricity and thermal differential expansion, providing key data support for judging unit thermal stability and mechanical health status. It is also widely applied in high-speed industrial blowers, industrial pumps and other rotating equipment groups, serving as a professional precision monitoring unit for shaft displacement parameters, effectively filling the accuracy gap of general vibration modules in micro-displacement detection and ensuring the safe and efficient operation of high-value industrial equipment.