Bently Nevada 138257-02

Description

Core Isolation & Signal Specifications

• Module Type: TMR Triple Modular Redundant Internal Signal Barrier Module
• Isolation Structure: Full galvanic isolation between field side and system internal side
• Isolation Withstand Voltage: 2500 Vrms AC, 1 minute isolation test
• Supported Signal Types: Eddy current proximity transducer DC gap voltage, AC vibration dynamic signal, Keyphasor pulse speed signal
• Number of Isolated Signal Channels: Full chassis channel coverage, matched with all proximity monitor slots
• Signal Transmission Bandwidth: 0 Hz – 10 kHz (+0/-3 dB)
• Signal Insertion Loss: ≤0.1 dB at full operating frequency range
• Surge Protection Level: Industrial grade ESD, surge and transient overvoltage protection
• Measurement Signal Accuracy Retention: Maintains original transducer signal accuracy at ±0.5% full scale range

Electrical System Specifications

• Power Supply: Powered by 3500 system chassis backplane power supply, nominal 26 VDC
• Total Power Consumption: 3.2 W
• Operating Current: ≤15 mA
• Communication Mode: Passive signal isolation transmission, no independent communication bus
• Status Indication: Independent OK power/status LED indicator
• Matching System: Full compatibility with all 3500 series monitor modules (3500/40M, 3500/50, 3500/60, etc.)

Mechanical & Physical Specifications

• Module Dimensions: 241.3 mm × 24.4 mm × 99.1 mm
• Net Weight: 0.38 kg
• Housing Material: Industrial metal shielding shell, anti-corrosion and anti-electromagnetic interference
• Installation Mode: Standard dedicated plug-in slot mounting for 3500 system chassis back internal position
• Termination Structure: Internal passive barrier circuit, fixed internal wiring
• Maintenance Feature: Hot-swappable field replaceable design

Environmental Specifications

• Operating Temperature: -40 °C to +85 °C
• Storage Temperature: -50 °C to +90 °C
• Relative Humidity: 5%–95% non-condensing
• Anti-interference Performance: Fully complies with industrial EMC electromagnetic compatibility standards
• Protection Performance: Dust-proof, moisture-proof, vibration-resistant for harsh industrial sites

Certifications & Compliance

• API 670 Machinery Protection Standard Compliance
• CE Industrial Safety Certification
• CSA Certification
• Full TMR Triple Modular Redundant System Compliance
• RoHS Lead-Free Compliance

Core Functional Features

1. Dedicated TMR Redundant Internal Barrier Design

   Exclusive TMR triple redundant isolation architecture, matches full TMR voting protection system, completely eliminates single-point isolation failure risk for key machinery protection occasions.
2. High-Voltage Full Galvanic Isolation

   2500 Vrms isolation between field sensor circuits and system internal monitoring circuits, thoroughly eliminates ground loop current, common-mode electromagnetic interference and signal distortion.
3. Integrated Surge & Overvoltage Protection

   Built-in ESD electrostatic protection, surge transient protection and overcurrent limiting circuits, effectively protects internal monitor modules from external lightning surge, wiring short circuit and high-voltage impact damage.
4. Zero Signal Distortion Transmission

   Ultra-low insertion loss passive isolation circuit, fully retains original proximity transducer gap voltage, dynamic vibration waveform and Keyphasor phase/speed signal integrity.
5. Chassis-Wide Universal Compatibility

   Perfectly matches all 3500 series vibration, position, speed and process monitor modules, realizes unified isolation protection for all monitoring channels in one chassis.
6. Passive Reliable Circuit Structure

   Adopts fully passive isolation components, no active control circuits, extremely high long-term operation stability and ultra-low failure rate.
7. Hot-Swappable Easy Maintenance

   Online pluggable module structure, completes barrier module replacement without system shutdown and equipment stop, greatly improves on-site maintenance efficiency.
8. Compact Internal Mounting Structure

   Installed inside 3500 chassis backplane, does not occupy external slot resources, keeps chassis panel neat and beautiful.
9. Full API 670 Standard Compliance

   Meets international rotating machinery protection specifications, supports formal project acceptance and OEM factory original matching applications.

Main Application Scenarios

• Power plant steam turbines, gas turbines and generator TMR protection units
• Petrochemical high-risk centrifugal compressors and process gas compressors
• Offshore oil & gas platform critical rotating production equipment
• Large industrial oil pumps, water pumps, high-speed fans and high-voltage motors
• Chemical processing plant key rotating machinery safety protection systems
• All industrial high-risk occasions requiring TMR redundant API 670 standard machinery protection
• Machinery predictive maintenance and high-reliability equipment health management systems

Part Number Definition

• 138257-02: Official dedicated part number for 3500/04 TMR Triple Modular Redundant Internal Signal Barrier Isolation Module
• Distinguished from standard non-TMR version 138257-01
• Exclusive for full TMR redundant voting 3500 machinery protection systems