Product Description

The BENTLY NEVADA 3500/22M​is a critical system module from Baker Hughes’s Bently Nevada brand,a global leader in machinery condition monitoring.It functions as the Rack Interface Module(RIM)for the renowned 3500 Machinery Protection System,serving as the central communication and power management hub for the entire monitoring framework.This module is engineered to provide the robust functionality and extreme reliability required for protecting high-value assets like turbines,compressors,and pumps in the most demanding industrial environments.

Application Scenarios

In a large liquefied natural gas(LNG)plant,a bank of centrifugal compressors driven by gas turbines is critical to the entire operation.The sudden,unplanned trip of a single compressor can result in millions of dollars in lost production daily.The plant relies on a BENTLY NEVADA 3500​system,with the 3500/22M​Rack Interface Module at its core,to continuously monitor the vibration,speed,and temperature of these massive rotating assets.The 3500/22M​seamlessly integrates data from dozens of specialized monitoring modules(vibration,position,temperature)within the same rack.It consolidates this information and communicates it to the plant’s Distributed Control System(DCS)and a dedicated asset management platform like System 1.When a vibration reading on the compressor’s thrust bearing begins to trend dangerously high,the 3500/22M​ensures that an alert is immediately raised in the control room,allowing operators to investigate.More critically,if a pre-set danger threshold is exceeded,the 3500/22M​executes a failsafe shutdown command through the system’s redundant TMR(Triple Modular Redundant)trip relays,preventing catastrophic mechanical failure.The key pain point addressed is the transformation of raw sensor data into reliable,timely,and actionable intelligence for both operational guidance and ultimate equipment protection.

Key Parameters

Main Parameters

Value/Description

Product Model​

3500/22M​

Manufacturer​

Bently Nevada(A Baker Hughes Business)

Product Category​

Rack Interface Module(RIM)

Primary Function​

System communication,power distribution,and alarm management hub.

Rack Power Supply​

Accepts primary and secondary input power;distributes+5V,±15V to all modules.

Communication Ports​

Two RS-232/485 ports for interfacing with DCS,PLC,or HMIs.

Keyphasor Inputs​

Two dedicated inputs for speed/phase reference signals.

System OK Relay​

Provides a summary health status of the entire monitoring rack.

Algorithm Processing​

On-board processing for derived measurements(e.g.,RPM,phase angle).

Redundancy Support​

Supports integration with a redundant 3500/22M​in a separate rack.

Software Configuration​

Exclusively configured using Bently Nevada’s 3500 Configuration Software.

Operating Temp Range​

-30°C to+65°C(standard industrial range).

Technical Principles and Innovative Values

The 3500/22M​is not a simple passive backplane;it is an intelligent,active manager that elevates the 3500 system from a collection of monitors to an integrated protection system.

Innovation Point 1:Centralized Intelligent Power Management.​Unlike basic modules that merely pass through power,the 3500/22M​conditions and distributes highly stable,filtered DC power to every slot in the rack.This eliminates ground loops and noise,ensuring the precision required for sensitive vibration measurements.It continuously monitors the health of the primary and secondary power supplies,ensuring seamless operation.

Innovation Point 2:High-Integrity Data Concentration and Communication.​The module acts as a sophisticated data concentrator and gateway.It polls all monitoring modules in the rack,processes raw data(e.g.,calculating true RMS values or peak-to-peak levels),and presents it to external systems via industry-standard Modbus RTU or other serial protocols.This simplifies integration and reduces the load on the host DCS.

Innovation Point 3:Core-to-Trip Logic and”System OK”Relay.​A foundational safety innovation is the”System OK”relay.This relay de-energizes only if the 3500/22M​and the entire rack are healthy.This relay’s contacts are wired in series with the safety shutdown circuit from the TMR logic solvers.If the monitoring system itself fails,this relay drops out,causing a safe shutdown,thus preventing a dangerous”fail-silent”scenario.

Application Cases and Industry Value

Case Study:Reliability Upgrade in a Combined Cycle Power Plant

A 500MW combined cycle power plant was experiencing unplanned outages related to its steam turbine.The existing monitoring system was outdated,with slow response times and unreliable communications.The plant engineers selected the Bently Nevada 3500​system for a turbine protection upgrade.The 3500/22M​Rack Interface Module was installed as the centerpiece,integrating new proximity probes for radial vibration and eccentricity,and temperature modules for bearing conditions.

During a startup following the upgrade,the 3500/22M​provided clear,real-time data to the control system,allowing for a smoother roll-up to operating speed.Several months later,the system detected a developing imbalance on the low-pressure rotor.The trended vibration data,consolidated by the 3500/22M,provided the maintenance team with ample warning.They scheduled a planned outage for blade cleaning during a period of low grid demand,avoiding a forced outage that would have cost an estimated$200,000.The plant manager reported a significant increase in operational confidence and a direct ROI within the first year through avoided downtime.

Related Product Combination Solutions

The 3500/22M​is designed to work in concert with a full suite of specialized monitoring modules within the 3500 framework.

3500/42M Transient Data Interface:​Captures startup/shutdown data(Bode plots,Nyquist plots)for advanced machinery diagnosis,with data managed by the 3500/22M.

3500/25 Keyphasor Module:​Provides the essential speed and phase reference signal required by the 3500/22M​for vibration phase analysis.

3500/45 Proximitor Monitor:​The workhorse for measuring shaft relative vibration and position;multiple modules typically report to a single 3500/22M.

3500/50 Seismic Monitor:​For measuring casing vibration(absolute vibration)via accelerometers,complementing the proximity probe data.

3500/32 4-Channel Relay Module:​Provides dedicated shutdown relays;its trip decisions are based on alarms processed and communicated by the 3500/22M.

3500/92 Communication Gateway:​Adds Ethernet connectivity to the system,often working alongside the 3500/22M​to bridge data to higher-level networks.

3300 XL Proximity Transducer System:​The industry-standard sensors that provide the raw analog signals to the 3500 monitoring modules.

Installation,Maintenance,and Full-Cycle Support

Installation and commissioning of the 3500/22M​must be performed by qualified personnel following the detailed procedures outlined in the product manual.The module slides into the designated slot(typically slot 5 or 6)in the 3500 rack.Critical steps include verifying the rack wiring for power and Keyphasor inputs,and establishing the serial communication link to the host system using the correct baud rate and protocol settings.All configuration,from setting communication parameters to defining alarm delay times,is performed offline using the dedicated 3500 Configuration Software and then downloaded to the module.

Routine maintenance is minimal due to the module’s high reliability.The primary focus is on periodic system health checks,verifying the”System OK”relay status,and confirming communication integrity with the DCS.Should a fault occur,the 3500/22M​provides clear front-panel LED status indicators to aid in troubleshooting.Module replacement is straightforward:after configuring an identical spare module offline,the faulty unit can be hot-swapped(if the rack is powered from a redundant supply)to minimize system downtime.

We guarantee that every BENTLY NEVADA 3500/22M​we supply is 100%genuine,sourced through authorized channels,and undergoes rigorous functional testing prior to shipment.We provide a 12-month warranty and expert technical support to assist with configuration and integration challenges.Our commitment is to ensure your machinery protection system operates with absolute reliability.

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