Introduction to Part 3500/15-02-00-00
The 3500/15-02-00-00 is a Quad Proximitor® Driver Module for the Bently Nevada 3500 monitoring system. Its primary function is to provide power and signal conditioning for four (4) independent eddy current proximity probes. It serves as the essential interface between the proximity probes on the machine and the monitoring modules (like the 3500/42M Vibration Monitor) in the rack. This module supplies a high-frequency radio frequency (RF) signal to each probe, conditions the returning signal, and outputs both a DC voltage proportional to the average gap between the probe tip and the shaft, and an AC voltage proportional to the dynamic motion (vibration) of the shaft. It is a fundamental component for measuring radial vibration, axial position, and speed.
Parameters / Specifications
The key technical parameters for the 3500/15-02-00-00 module are summarized in the table below.
| Parameter | Specification | Notes / Explanation |
|---|---|---|
| Model Number | 3500/15-02-00-00 | Bently Nevada Quad Proximitor® Driver |
| Product Type | Rack-Mount Interface Module | |
| Compatible Rack | Bently Nevada 3500 Rack | Requires a 3500 series frame for operation. |
| Module Slot Size | Single Slot | Occupies one slot in the 3500 rack. |
| Dimensions (H x W x D) | Approx. 193mm x 55mm x 200mm | Standard dimensions for a 3500 series module. |
| Weight | Approx. 0.7 kg (1.5 lbs) | |
| Power Requirement | +24 VDC (from rack backplane) | Powered by the main rack power supplies. |
| Input Power (to Probes) | -24 VDC (regulated) | Provides power for up to 4 eddy current probes. |
| Number of Channels | 4 | Can drive four independent proximity probes. |
| Compatible Probes | Bently Nevada 5mm, 8mm, 11mm, 14mm, 25mm, and 35mm Proximity Probes & System Extension Cables. | Must be used with approved probes and cables. |
| Output Signals | Conditioned DC Gap Voltage (-2 to -18 VDC) and AC Vibration signals for each channel to monitoring modules. | Routes signals to other cards in the rack (e.g., 3500/42M). |
| Front Panel Indicators | Power (OK), Channel Fault LEDs | LED status indicators for module and individual channel health. |
| System Function | Provides power, regulates scale factor, and conditions signals for four proximity transducer systems. | Ensures consistent probe performance. |
| Operating Temperature | -20°C to +65°C | Standard for industrial monitoring hardware. |
Application Scenarios
The 3500/15 Quad Proximitor Module is a fundamental component in protecting and monitoring high-value rotating machinery across various industries, especially in dense applications where multiple probes are needed.
Turbine Monitoring: Essential for powering and conditioning signals from multiple vibration and Keyphasor® probes on gas and steam turbines in power generation.
Compressor Protection: Used on centrifugal and axial compressors in oil & gas production to monitor radial vibration at multiple bearings and axial thrust position from a single module.
Multi-Bearing Machine Monitoring: Ideal for complex machinery with several bearing points, such as large multi-stage pumps, turbo-expanders, and high-speed gearboxes, allowing multiple probes to be managed efficiently.
System Consolidation: Allows for a more compact rack configuration by servicing four transducer channels with one module slot, improving channel density.
Retrofit and Upgrades: Used to modernize existing monitoring systems by replacing older, standalone proximitor power supplies with an integrated, rack-mounted solution.
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