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The Bently Nevada 3500/25-02-03-RU is a high-performance Keyphasor® Module engineered for use within the 3500 Machinery Protection System. It serves as a critical timing reference module that acquires shaft reference signals from rotating machinery and distributes synchronized timing information to monitoring modules installed in the same protection rack. By providing an accurate rotational reference, the module enables precise vibration analysis, shaft phase measurement, speed calculation, vector analysis, and dynamic condition monitoring.
Designed for continuous industrial service, the 3500/25-02-03-RU accepts pulse signals from proximity probes or magnetic pickup sensors mounted near rotating shafts. The incoming signals are processed using high-speed digital electronics to generate stable and repeatable timing references. These references are essential for machinery protection systems that monitor the operating condition of turbines, compressors, generators, motors, pumps, fans, and other critical rotating equipment.
The RU configuration is intended for applications requiring localized documentation or regional identification while maintaining full functional compatibility with other members of the 3500 Series. The module retains the same hardware architecture, monitoring capability, and installation method as standard versions, ensuring seamless integration into existing protection systems.
Its modular construction allows quick installation and replacement within the rack without extensive rewiring. Communication takes place through the internal rack backplane, reducing system complexity while improving reliability. The compact design, durable construction, and stable long-term performance make this module an excellent choice for demanding industrial environments.
| Parameter | Specification |
|---|---|
| Model | 3500/25-02-03-RU |
| Product Type | Keyphasor® Module |
| Brand | Bently Nevada |
| Series | 3500 Machinery Protection System |
| Installation Method | Rack Mounted |
| Rack Compatibility | 3500 Protection Rack |
| Input Channels | Two Independent Keyphasor Inputs |
| Supported Input Devices | Proximity Probes and Magnetic Pickups |
| Signal Processing | High-Speed Digital Pulse Processing |
| Primary Function | Shaft Reference Signal Acquisition |
| Synchronization | Multi-Channel Timing Reference |
| Communication Interface | Internal Rack Backplane |
| Configuration | Software Configurable |
| LED Indicators | Module Status and Channel Status |
| Power Supply | Powered Through Rack |
| Electromagnetic Compatibility | High EMI Immunity |
| Cooling Method | Passive Air Cooling |
| Housing Material | Industrial Metal Enclosure |
| Industrial Duty | Continuous 24/7 Operation |
| Maintenance | Plug-In Modular Replacement |
| Dimensions | Approximately 241 × 24 × 250 mm |
| Weight (kg) | Approximately 0.82 kg |
The 3500/25-02-03-RU is specifically designed to provide highly accurate shaft timing reference signals for rotating machinery monitoring systems. Its advanced digital circuitry continuously converts pulse inputs into synchronized reference signals that support precise machinery diagnostics.
The module incorporates two independent input channels, allowing simultaneous monitoring of separate shaft reference signals. This dual-channel capability provides additional flexibility for multi-shaft machines and redundant monitoring applications.
High-performance digital signal processing minimizes pulse distortion and effectively suppresses electrical interference, resulting in reliable measurements even in harsh industrial environments.
The module integrates directly into the 3500 rack architecture, simplifying installation and eliminating the need for separate synchronization equipment. This integrated approach reduces wiring complexity and enhances overall system reliability.
Industrial-grade electronic components are selected to ensure stable performance during long-term continuous operation. The front-panel status indicators provide immediate visual confirmation of operating conditions, allowing maintenance personnel to identify system status quickly.
The modular plug-in design also simplifies maintenance by allowing rapid replacement during scheduled service intervals or troubleshooting procedures.
The 3500/25-02-03-RU offers outstanding timing accuracy, enabling vibration monitoring modules to perform highly precise shaft phase measurements and rotational speed calculations. Accurate synchronization improves the effectiveness of predictive maintenance programs by allowing earlier detection of machinery faults.
Its seamless compatibility with the complete 3500 Machinery Protection System eliminates integration challenges and allows straightforward system expansion.
Dual independent Keyphasor channels increase operational flexibility by supporting multiple reference inputs, making the module suitable for both simple and complex rotating equipment.
Excellent resistance to electromagnetic interference improves signal quality and minimizes false triggering caused by industrial electrical noise.
The compact rack-mounted design optimizes cabinet space while maintaining high-performance signal processing capabilities.
Durable industrial construction supports reliable operation under continuous service conditions, helping reduce maintenance requirements and extend equipment life.
The software-configurable architecture simplifies commissioning and system adjustments without requiring extensive hardware modifications.
Low maintenance requirements, combined with dependable long-term performance, contribute to lower operating costs and improved machinery availability.
The 3500/25-02-03-RU is widely used in industrial facilities that require continuous protection and condition monitoring of critical rotating machinery.
Typical application areas include:
The module is particularly suitable for applications where shaft phase reference signals are required for vibration diagnostics, balancing analysis, overspeed protection support, and comprehensive machinery condition monitoring.
Bently Nevada is one of the industry’s most recognized brands in machinery protection and condition monitoring. Its monitoring technologies are designed to improve machinery reliability, reduce maintenance costs, and support predictive maintenance strategies across numerous industrial sectors.
The product portfolio includes machinery protection systems, vibration monitoring modules, proximity sensing technologies, communication interfaces, temperature monitoring modules, speed monitoring equipment, position monitoring devices, and integrated diagnostic solutions for rotating machinery.
Its products are extensively used in power generation, oil and gas production, petrochemical processing, mining, marine engineering, heavy manufacturing, and industrial automation.
The 3500 Series is a modular online machinery protection platform designed for continuous monitoring of rotating equipment operating in demanding industrial environments. Each module performs a dedicated monitoring function while communicating through the integrated rack architecture.
The platform supports flexible configuration and future expansion, allowing users to build customized protection systems according to specific machinery requirements.
The series includes:
Its modular architecture simplifies installation, maintenance, system upgrades, and future expansion while maintaining high operational reliability.
| Model | Product Type | Main Parameters | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 3500/22M-01-01-00 | Transient Data Interface Module | Ethernet communication, rack interface, system configuration | Approximately 241 × 24 × 250 mm | Approximately 0.80 |
| 3500/15-05-05-00 | Power Supply Module | AC/DC input, redundant rack power support | Approximately 241 × 24 × 250 mm | Approximately 1.20 |
| 3500/40M-01-00 | Proximitor Monitor | Four-channel radial vibration monitoring | Approximately 241 × 24 × 250 mm | Approximately 0.88 |
| 3500/42M-04-00 | Proximitor/Seismic Monitor | Shaft vibration, thrust position, seismic monitoring | Approximately 241 × 24 × 250 mm | Approximately 0.90 |
| 3500/50M-01-00 | Tachometer Module | Speed measurement, reverse rotation, overspeed detection | Approximately 241 × 24 × 250 mm | Approximately 0.85 |
| Model | Product Type | Main Parameters | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 3500/92-01-01-00 | Communication Gateway Module | Ethernet communication, Modbus interface, system integration | Approximately 241 × 24 × 250 mm | Approximately 0.82 |
| 3500/53-03-00 | Electronic Overspeed Detection Module | Independent overspeed protection, redundant logic | Approximately 241 × 24 × 250 mm | Approximately 0.87 |
| 3500/60-01-00 | Temperature Monitor | RTD and thermocouple monitoring, multi-channel input | Approximately 241 × 24 × 250 mm | Approximately 0.90 |
| 3500/45-01-00 | Position Monitor | Differential expansion, valve position, eccentricity monitoring | Approximately 241 × 24 × 250 mm | Approximately 0.89 |
| 3300 XL 8 mm Proximitor Sensor | Proximity Sensor System | High-resolution shaft displacement and vibration measurement | Probe dependent | Approximately 0.45 |
The Bently Nevada 3500/25-02-03-RU is a reliable and highly accurate Keyphasor® Module developed for the 3500 Machinery Protection System. It delivers precise shaft reference signals that enable synchronized vibration monitoring, phase analysis, rotational speed calculation, vector analysis, and advanced machinery diagnostics for critical rotating equipment.
Its dual-channel architecture, high-speed digital signal processing, excellent electromagnetic compatibility, compact rack-mounted construction, and full compatibility with the 3500 platform make it an ideal solution for demanding industrial applications. The module supports continuous operation in power generation, petrochemical processing, oil and gas production, mining, marine engineering, heavy manufacturing, and other industries where dependable machinery protection, predictive maintenance, and long-term operational stability are essential.