Introduction
The Bently Nevada 3500/40M-01-00 176449-01 is a specific hardware revision of the 3500/40M Proximitor® Power Supply and Interface Module, a critical support module within the GE Bently Nevada 3500 Machinery Protection System.
Its primary function is to provide the necessary -24 V DC power to the eddy current proximity probes and associated proximitors used for vibration and position monitoring. Without this module, the eddy current measurement channels (like those on a 3500/25 or 3500/45 Vibration Monitor) cannot function. It acts as a centralized, redundant power source and interface point, simplifying wiring and improving system reliability. The module also provides signal conditioning and isolation for the transducer inputs, ensuring clean and accurate data is passed to the monitoring modules.
Parameters / Specifications
The key technical specifications for the Bently Nevada 3500/40M-01-00 176449-01 are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 3500/40M-01-00 176449-01 |
| Product Line | GE Bently Nevada 3500 System |
| Module Type | Proximitor® Power Supply and Interface Module |
| Primary Function | Provides -24 V DC power for eddy current probes and signal conditioning. |
| Number of Channels | 8 (Can power and interface with up to 8 eddy current transducer inputs) |
| Output Voltage | -24 V DC (Redundant, isolated) |
| Input Power | Derived from the 3500 Rack |
| Compatibility | Designed to work with monitor modules like the 3500/25 (Vibration) and 3500/42 (Speed). |
| Mounting | Slides into a slot in the 3500 rack. |
| Dimensions (H x W) | Standard 3500 Series Module (Approx. 3.9" x 8.7" or 99 mm x 221 mm) |
| Weight (Approx.) | 1.2 lbs (0.54 kg) |
| Operating Temperature | 0°C to +65°C (+32°F to +149°F) |
Application Scenarios
The 3500/40M module is an enabling component, deployed in any 3500 system that uses eddy current proximity probes for measurement. It is the backbone for the entire relative vibration and position monitoring subsystem.
Typical application scenarios include:
Powering Vibration Monitoring Systems:
Installed in a 3500 rack to supply power to all eddy current probes measuring radial shaft vibration on turbines, compressors, and large pumps via modules like the 3500/25 or 3500/45. It is a mandatory component for these measurements.
Supporting Keyphasor® and Speed Inputs:
Providing power for eddy current probes used as Keyphasor® (once-per-revolution timing) sensors or for speed measurement, which are critical for phase analysis and overspeed protection.
Axial Position Monitoring:
Powering the probes that monitor the axial thrust position of a rotor, a critical function for preventing thrust bearing failure in turbines and compressors.
System Simplification and Reliability:
Centralizing the power supply for multiple probes, which reduces external wiring, minimizes potential failure points, and provides a clean, regulated power source that improves the overall accuracy and reliability of the monitoring system.
Industries of Use:
Power Generation (Gas, Steam, and Hydro Turbines)
Oil & Gas (Pipeline Compressors, Pumps)
Petrochemical & Refining
Marine Propulsion
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