Bently Nevada 3500/40M Proximitor Monitor

Bently Nevada 3500/40M is a key monitoring module in the Bently Nevada 3500 series, designed specifically for multi-parameter comprehensive monitoring of rotating machinery, and plays an important role in industrial equipment condition monitoring and protection systems. It can perform real-time, high-precision monitoring of various key operating parameters such as vibration, shaft displacement, speed, and temperature of large rotating machinery such as steam turbines, generators, gas turbines, and compressors. By continuously tracking the changing trends of these parameters, it can timely identify potential fault risks of equipment, and trigger alarms or shutdown protection when parameters exceed the safe range, thereby minimizing losses caused by equipment failures and ensuring the continuity and safety of industrial production. With its comprehensive monitoring capabilities and reliable performance, this module is widely used in industries with high requirements for equipment reliability, such as electric power, oil and gas, chemical industry, and metallurgy.

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• Number of Monitoring Channels: Equipped with 8 independent monitoring channels, each of which can be flexibly configured to different signal types. It can monitor parameters of multiple key parts of the equipment (such as multiple bearings and shaft segments) at the same time, meeting the complex monitoring needs of large rotating machinery and improving the comprehensive control ability of equipment status.

• Signal Input Types: Supports various sensor signal inputs, including eddy current sensor signals (for shaft vibration and shaft displacement measurement), speed sensor signals (for bearing vibration measurement), acceleration sensor signals, keyphasor signals (for speed and phase measurement), and RTD (resistance temperature detector) signals (for temperature measurement), etc. It has strong compatibility and can be adapted to sensors of multiple brands.

• Measurement Range: Adaptable measurement ranges are set for different signal types. For example, the shaft displacement measurement range of eddy current sensors can reach ±1mm, and the vibration measurement range is 0-1000μm peak-to-peak; the vibration measurement range of speed sensors is 0-100mm/s; the RTD temperature measurement range is -200℃-850℃, which can cover the parameter change range of most industrial rotating machinery.

• Accuracy and Resolution: The measurement accuracy is extremely high, with vibration and shaft displacement measurement accuracy up to ±0.1% FS, and temperature measurement accuracy of ±0.5℃; the resolution is 16 bits, which can accurately capture subtle changes in parameters, providing accurate data support for early diagnosis of equipment faults.

• Sampling Rate: The sampling rate of each channel is as high as 20kHz, which can quickly capture high-frequency vibration signals and transient impact signals, ensuring that no abnormal fluctuations in equipment operation are missed, such as signals generated by sudden faults such as high-frequency resonance of the rotor and blade fracture.

• Alarm and Protection Settings: Each channel can be independently set with multi-level alarm thresholds (such as prompt, warning, danger) and supports multiple alarm logics (such as instantaneous over-limit, continuous over-limit, rate of change over-limit, etc.). When the parameter reaches the warning threshold, an alarm signal is issued through the indicator light and communication interface; when it reaches the danger threshold, the relay output is immediately triggered to realize emergency shutdown of the equipment, with a response time of less than 5ms, providing fast and effective protection for the equipment.

• Communication Interface: Equipped with a high-speed interface for communication with the 3500 series rack, it can transmit real-time monitoring data, alarm information, etc. to the 3500 main rack and upper computer monitoring software (such as System 1), and supports redundant communication mode to ensure the stability and continuity of data transmission and avoid monitoring failure caused by communication interruption.

• Power Requirements: The working power supply is 24V DC, with a power consumption of about 400mA during normal operation. The power supply adaptation range is 18V DC-32V DC, and it can operate stably in an environment with industrial power supply voltage fluctuations. The module integrates overvoltage, overcurrent, and reverse connection protection circuits to effectively protect the module from damage caused by abnormal power supply.

• Environmental Adaptability: The operating temperature range is 0℃-60℃, which can operate reliably in high-temperature environments in control rooms or near equipment; the relative humidity is 5%-95% RH (non-condensing), which can adapt to humid industrial environments; it has strong anti-electromagnetic interference ability, meets industrial electromagnetic compatibility standards, and ensures the accuracy of measurement data in complex electromagnetic environments.

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• Multi-parameter Integrated Monitoring: It can monitor multiple parameters such as vibration, shaft displacement, speed, and temperature at the same time, realizing a comprehensive evaluation of the equipment's operating status. For example, by combining vibration data with temperature data for analysis, it can more accurately judge whether the bearing has faults such as overheating and wear, improving the accuracy of fault diagnosis.

• Advanced Signal Analysis Function: Built-in powerful signal processing algorithms, it can perform real-time spectrum analysis, waveform analysis, trend analysis, etc. on the collected original signals, extract characteristic frequency components in the signals (such as rotation frequency, harmonic frequency), help maintenance personnel identify common fault types such as rotor unbalance, misalignment, looseness, and friction, and provide a basis for predictive maintenance of equipment.

• Flexible Configuration and Expansion: It supports parameter configuration through 3500 rack configuration software, including channel signal type, measurement range, alarm threshold, filtering parameters, etc. Users can make personalized settings according to the characteristics and monitoring needs of different equipment. At the same time, the module supports seamless integration with other modules of the 3500 series (such as communication modules, display modules), facilitating system expansion and upgrading.

• Comprehensive Diagnosis and Alarm Mechanism: It has a complete self-diagnostic function, which can real-time monitor the hardware status of the module itself (such as power supply, communication, channel faults) and the connection status of sensors (such as disconnection, short circuit), and issue corresponding diagnostic alarms. For equipment monitoring parameters, a hierarchical alarm mechanism is adopted, through clear indicator light status and detailed alarm information, allowing operators to quickly understand the abnormal degree of the equipment and take timely countermeasures.

• Redundant Design Ensures Reliability: It supports redundant configuration and can form a redundant system with another 3500/40M module. The main and standby modules synchronize data in real time. When the main module fails, the standby module can automatically switch within milliseconds, ensuring that the monitoring process is not interrupted, which is suitable for key equipment with extremely high requirements for monitoring continuity.

The working principle of the Bently Nevada 3500/40M module is based on high-precision signal acquisition, processing, analysis, and protection control. Firstly, various sensors installed on the equipment (such as eddy current sensors, speed sensors, RTD sensors) convert the physical parameters of the equipment (vibration, displacement, temperature, speed) into electrical signals, which are transmitted to the corresponding channels of the module through shielded cables.