Executive Summary and Core Platform Capabilities
Designed for high-consequence machinery such as multi-stage centrifugal compressors, steam and gas turbines, and reciprocating gas drives, the Bently Nevada 3500 provides hardware-based auto-shutdown protection against catastrophic failure. Operating in conjunction with proximity probes, velocity sensors, accelerometers, and thermocouples, the 3500 chassis continuously evaluates vibration levels, bearing temperatures, and rod position.
- Flexible Chassis Options: Available in a standard 19-inch EIA 14-slot full rack or a 12-inch 7-slot mini-rack, support panel, rack, or bulkhead mounting formats.
- High Availability Power (3500/15): Accommodates dual-redundant AC/DC power supply modules operating across wide input voltage ranges to ensure uninterrupted rack operation.
- Hot-Swappable Design: Individual monitor modules and I/O field cards can be serviced or swapped online without interrupting surrounding active protection channels.
- 3500/22M Transient Data Interface (TDI): Acts as the central bridge between the 3500 rack backplane and external software platforms.
- High-Speed Event Logging: Captures high-frequency transient vibration data, orbits, spectrums, and thermal logs during machine startups, coast-downs, and unexpected trip events.
- System 1 Diagnostic Integration: Directly feeds high-density diagnostic data via Ethernet to Baker Hughes System 1 for predictive asset health monitoring.
Key Monitoring Modules for Turbomachinery & Compressors
| Module | Primary Function and Capabilities |
|---|---|
| 3500/40M Proximitor Monitor | Accepts inputs from eddy current proximity probes to measure radial vibration and axial thrust position. |
| 3500/42M Proximitor / Seismic | 4-channel monitor supporting proximity probes, velocity sensors, and accelerometers for casing vibration. |
| 3500/25 Enhanced Keyphasor | Processes phase reference signals from shaft keyways to compute rotational speed and phase angle. |
| Module | Primary Function and Capabilities |
|---|---|
| 3500/72M Recip Rod Position | Tracks piston rod drop and position in real time to evaluate rider ring wear on reciprocating gas compressors. |
| 3500/77M Recip Cylinder Pressure | Monitors dynamic internal cylinder pressures for calculating thermodynamic performance and mechanical loading. |
| 3500/70M Recip Impulse / Velocity | Detects loose mechanical components, impact spikes, and crosshead accelerations in reciprocating drives. |
| Module | Primary Function and Capabilities |
|---|---|
| 3500/60 & 3500/65 Temperature | 6-channel and 16-channel modules for continuous RTD and Thermocouple thermal monitoring (bearings, windings, oil). |
| 3500/62 Process Variable | Accepts standard 4–20 mA, 1–5 VDC inputs to log process pressures, flows, and suction/discharge variables. |
| 3500/92 Communication Gateway | Translates internal rack measurements into Modbus TCP/IP or Modbus RTU serial protocols for DCS/PLC integration. |
Target Industry Applications
Oil & Gas Centrifugal & Recip Compressors
Full protection against shaft displacement, bearing degradation, rod drop, and thermal over-temperature in refinery drives.
Power Generation Steam & Gas Turbines
API 670 compliant speed, overspeed, axial movement, and differential expansion monitoring for turbine-generator sets.
External Resources and Technical Support
Explore official product documentation, configuration utilities, and regional field support channels: