Bently Nevada 3500 Series Online Monitoring and Protection System
As a benchmark product in the global industrial rotating machinery monitoring field, the Bently Nevada 3500 Series Online Monitoring and Protection System provides full-lifecycle continuous online condition monitoring and safety protection for unit equipment. The system is deeply adapted to Bently's full range of sensor ecosystems, seamlessly compatible with eddy current proximity sensors (such as the 3300 series), velocity/acceleration sensors (such as the 330400/330500 series), and composite sensors, establishing a high-precision data acquisition network. With its globally leading anti-mis-tripping technology, the system has been successfully deployed in over 80,000 installations worldwide. It achieves automatic equipment protection through intelligent tripping logic, accurately avoiding unplanned downtime and high maintenance costs caused by misoperations.
The 3500 Series Protection and Condition Monitoring System is a flexible and scalable platform that enables continuous online monitoring of your most critical machinery and all other machine assets used across plant-wide processes, with all functions integrated into a comprehensive system.
Core Features
Reliability and Compliance
Designed to meet industrial-grade reliability requirements, the system fully complies with industry standards (such as API 670), providing robust monitoring and protection for critical assets.
Compatibility and Flexibility
It supports multiple sensor types (e.g., eddy current, velocity/acceleration sensors) and modular configurations, allowing flexible expansion based on asset scale and monitoring needs. It adapts to complex monitoring scenarios ranging from single equipment to plant-wide applications.
Interconnection with System 1® Software
The system seamlessly integrates with Bently Nevada’s System 1® Condition Monitoring and Diagnostic Analysis Platform, enabling data integration, trend analysis, and predictive maintenance strategy development to build an intelligent operation and maintenance system.
Diverse Optional Configurations
A variety of functional modules are available (e.g., redundant power supplies, communication gateways, dedicated analysis modules) to meet customized requirements for monitoring accuracy, redundancy levels, and communication protocols across different industries.
Safety Certifications
Certified by multiple international safety standards including DNV, ATEX, and CSA, the system is suitable for high-risk environments (such as flammable and explosive scenarios, offshore platforms), ensuring safe operation under harsh conditions.
The Bently Nevada 3500 Series Online Monitoring and Protection System is dedicated to assisting customers in overcoming the most complex operational challenges in the industrial sector. From refineries and petrochemical plants to hydropower facilities and wind farms, Bently Nevada's asset condition monitoring solutions leverage highly reliable vibration monitoring equipment and a full-cycle service portfolio to establish stability assurance systems for critical production assets such as turbines, compressors, motors, and generators. This significantly enhances equipment reliability and operational efficiency.
Core Functions and Technical Advantages
Full-Dimensional Condition Monitoring
The system integrates the industry's most comprehensive mechanical parameter measurement system, covering critical operational indicators such as axial displacement, differential expansion, vibration, rotational speed, and eccentricity. Paired with the System 1® Condition Monitoring and Diagnostic Analysis Software Platform, it can generate real-time trend charts, unit chain diagrams, and alarm event lists to provide foundational data support for predictive maintenance.
Multi-Level Redundancy and Fault-Tolerant Design
Power Supply and Module Redundancy: Supports flexible configurations ranging from dual-redundant power supplies to full-channel Triple Modular Redundancy (TMR). Critical channels can independently enable redundancy mechanisms to meet high-availability requirements in harsh environments such as nuclear power and petrochemical industries.
Self-Diagnosis Capability: Built-in full-link self-check function that monitors the status of sensors, modules, and communication links in real-time, automatically isolates faulty nodes, and ensures data integrity and system reliability.
Industrial-Grade Compatibility and Certification System
Standard Compliance: Fully complies with API 670 (Rotating Machinery Monitoring System Standard) and API 618 (Reciprocating Compressor Application Standard), making it the preferred solution for industries such as oil, chemical, and power.
Global Certification Coverage: Certified by DNV (Marine Applications), Class NK (Marine Engineering), CSA (Canadian Standards Association), FM (Factory Mutual), ATEX (Explosion-Proof Certification), CE, and other international certifications, adapting to complex industrial environments.
Intelligent Interconnection and Collaborative Control
Equipped with communication gateway modules for seamless integration with factory automation systems such as DCS and PLC, enabling cross-platform data interaction and remote monitoring.
Deep collaboration with System 1® software to create a closed-loop "Monitoring-Analysis-Maintenance" process, driving the transformation of maintenance models from passive response to proactive prevention through real-time health assessments.
Application Values
False Trip Protection: Filters interference signals based on adaptive algorithms to avoid false actions caused by environmental noise or transient fluctuations, reducing production losses from unnecessary downtime.
Asset Preservation: Extends equipment service life through early fault warnings and precise protection threshold settings, lowering high repair costs from sudden failures.
Compliance Assurance: Pre-integrated with industry-standard monitoring logic to simplify user compliance verification processes and meet safety audit and environmental regulatory requirements.
The 3500 Series redefines the performance benchmark for industrial machinery monitoring systems with its technical features of "full-scenario adaptation, full-link redundancy, and full-lifecycle protection," making it the trusted choice for ensuring the operation of critical infrastructure worldwide.
Optimization Notes
Standardized Technical Terminology: Unified professional terms such as "eddy current proximity sensor" and "Triple Modular Redundancy (TMR)" to enhance technical authority.
Clarified Logical Hierarchy: Improved information delivery efficiency through functional module division (monitoring, redundancy, compatibility, value).
Data Visualization Guidance: Highlighted key data such as "80,000 deployments" and "API standard compliance" to enhance product credibility.
Scenario-Based Value Extraction: Addressed user pain points such as false trips and asset preservation to clarify the practical benefits of the system's solutions.
Product Recommendations for the 3500 Series：
3500/05 System Rack
The 3500/05 System Rack houses all 3500 monitor modules and rack power supplies, enabling module-to-module communication, integration with System 1 software, and power distribution to individual modules as required. As a core component of Bently Nevada's Turbine Supervisory Instrumentation (TSI) suite, it is available in two sizes (standard 19" and 14"), three mounting configurations (rack, bulkhead, and panel), and optional internal barriers for hazardous areas. The rack features a weatherproof enclosure to protect against harsh environments and is certified as a SIL 2-rated system for intrinsic safety.
A half-height module designed for installation in the designated left-side slot of the rack, the 3500/15 supports single or dual power supply configurations (any combination of AC/DC). Either supply can power the entire rack, accepting a wide range of input voltages and converting them to the required voltages for 3500 modules. Ideal for machinery protection systems, it allows redundant power setup (lower slot for primary, upper slot for backup). The "hot-swappable" design permits module replacement without interrupting rack operation, powering all components including the Transient Data Interface (TDI), monitoring modules, I/O modules, and connected sensors.
3500/22M Transient Data Interface (TDI) Module
The core of the 3500 rack system, the TDI module configures rack parameters and serves as a gateway to the System 1 Machinery Condition Monitoring software platform. It features a front-panel USB port for configuration and a rear 10/100 Ethernet connection via the I/O module for System 1 communication. The front-panel rack reset button allows physical key-locked alarm reset and configuration change protection.
3500/25 Phase Reference Module
The 3500/25 provides phase reference signals for the 3500 rack (up to four per rack), enabling advanced machinery diagnostics. It processes inputs from proximity probes or magnetic sensors, converting once-per-revolution or multi-event pulses into precise digital timing measurements. This facilitates monitoring of critical parameters such as machine speed, 1X vibration amplitude, and phase angle, making it an essential component of Bently Nevada's TSI sensor suite. Certified for SIL 2 applications and multiple hazardous area approvals.
Featuring four independently configurable relay outputs, the 3500/32M supports highly customizable relay logic. Each output can be programmed to enable voting through alarm-driven logic, leveraging all channels within the 3500 machinery protection system. It integrates non-OK status, alarm, and danger setpoints to drive complex logic, offering options for "normal," "true," voting configurations, and channel-specific latching for critical applications.
3500/33 16-Channel Relay Module
With 16 relay outputs, the 3500/33 offers similar configurability to the 3500/32M, supporting independent programming and voting logic for each channel. It harnesses all system channels to implement complex logic strategies, including latching relay options per channel. Designed for large-scale industrial applications requiring extensive I/O capabilities.
Accepting inputs from Bently Nevada's 3300XL series Proximitors and seismic sensors, the 3500/40M conditions signals to provide vibration and position measurements. It compares processed signals against user-programmable setpoints to trigger alarms and relay logic. Available in external terminal and internal barrier versions, it supports monitoring of radial vibration, thrust position, differential expansion, eccentricity, etc., compliant with SIL 2 and multiple hazardous area certifications.
3500/42M Displacement/Vibration Monitor
This module provides four programmable channels for the 3500 system, accepting inputs from proximitors and seismic sensors. It conditions signals to generate vibration and position measurements, comparing them against user-programmable alarms. Configurable via rack software for monitoring radial vibration, thrust position, differential expansion, and other parameters critical to machinery protection.
3500/45 Expansion-Axial Position Monitor
The 3500/45 processes signals from 3300XL series proximitors, Rotational Position Transducers (RPT), and AC/DC Linear Variable Differential Transformers (LVDT). It outputs measurements for axial position, differential expansion (single/double ramp or complementary), casing expansion, and valve position, comparing them against user-defined alarm thresholds. A key component of Bently Nevada's TSI sensor suite.
Equipped with two channels for inputs from proximitor probes or magnetic sensors, the 3500/50M measures shaft speed, rotor acceleration, or reverse rotation. It compares conditioned signals against programmable setpoints to drive alarms and relay logic, supporting features like speed windows, zero-speed detection, and acceleration monitoring. Note: Not designed for overspeed protection. Available in external terminal and internal barrier versions, certified for SIL 2 and hazardous areas.
3500/92 Communications Gateway
The 3500/92 facilitates seamless integration with process control networks and automation systems via Ethernet TCP/IP and serial (RS232/RS422/RS485) communication. It supports Modbus communication with 3500 rack configuration software, allowing custom or compressed Modbus mappings for transmitting critical data such as vibration values, clearances, channel status, and trip multipliers. Ideal for industrial connectivity applications.
3500/94M VGA Display with Touchscreen
This module provides localized visualization of 3500 system data in control rooms or machinery areas. Featuring a color touchscreen and I/O capabilities, it displays vibration levels, system alarms, module/channel data, and supports up to nine custom display configurations. Pre-built "custom" screens (e.g., direct vibration, 1X vibration, clearance, alarms) enable quick deployment without configuration. Available in 10" and 15" sizes, supporting simultaneous monitoring of up to four independent 3500 racks. Options include hinged or panel-mounting and hazardous area certifications.
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