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Bently Nevada 3500/54｜Monitoring Module｜
The Bently Nevada 3500/54 is a dedicated torsional vibration monitoring module within the 3500 Machinery Protection System, designed for the measurement and protection of torsional vibration in rotating shaft systems. It provides early detection and warning of torsional vibration–related faults such as gearbox issues, coupling failures, and shaft cracks.
The module complies with API 670 requirements and is suitable for critical rotating machinery applications in power generation, petrochemical, and metallurgical industries.
Core Positioning and Key Characteristics
Dual-Channel Torsional Vibration Monitoring
Each 3500/54 module supports two independent torsional vibration input channels, compatible with 3300 XL series eddy current sensors or magneto-electric speed sensors. The module measures shaft torsional angle displacement and torsional vibration frequency for comprehensive shaft dynamics analysis.
Measurement Capability
Frequency range: 0.1 to 1000 Hz
Torsional angle resolution: 0.001°
Supports synchronous and asynchronous torsional vibration analysis
Capable of capturing transient torsional vibration events and impacts, enabling early fault identification
Protection Logic
Configurable torsional vibration amplitude and frequency thresholds are provided for alarm and shutdown functions. The module supports sensor failure detection, continuous self-diagnostics, and fault alarm indication to ensure high monitoring reliability.
Outputs and Communication
Provides dry-contact relay outputs for alarm and shutdown signals, suitable for direct interface with ESD systems. Supports Modbus, PROFIBUS, and 4–20 mA analog outputs, enabling integration with DCS and PLC systems. Fully compatible with the 3500 rack framework and supports remote configuration and diagnostics via System 1 software.
Safety and Environmental Specifications
Designed to meet SIL 2 safety requirements. Operating temperature range is –40 °C to +70 °C, making it suitable for both hazardous and non-hazardous areas and compliant with harsh industrial environment requirements.
Installation and Configuration
The module installs directly into a standard 3500 rack card slot. No local display is provided; monitoring, configuration, and diagnostics are performed remotely via the 3500 HMI (e.g. 3500/40) or System 1 software.
Bently Nevada 3500/54｜Monitoring Module｜
By structuring the information in this manner, the article provides a clear and organized understanding of input channels, transducer supply, and communication implementations in distributed control systems.
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