

Introduction
The 3500/62 133811-03 is a Quad-Channel Dynamic/Velocity Transducer Interface Module, a critical component within the Bently Nevada 3500 Machinery Protection System. Its primary function is to condition and monitor vibration signals from up to four proximity probes or seismic transducers (velocity sensors). The module converts raw sensor signals into standardized, high-integrity data for the system's monitoring and protection functions, enabling reliable detection of machinery faults such as unbalance, misalignment, and rotor rubs.
Parameters
The key technical parameters and physical specifications of the module are summarized in the table below.
| Parameter Category | Specification Details |
|---|---|
| Channels | 4 independent channels |
| Input Type | Accepts signals from dynamic transducers: Proximity Probes (for relative vibration/displacement) and Velocity Seismics (for absolute vibration/velocity). |
| Key Signal Processing | Integration (for velocity-to-displacement), Filtering, Adjustable Gains. |
| Key Electrical Specs | Provides -24 VDC power to proximity probes. Includes OK Check for sensor and cable integrity. |
| Communication | Integrates directly into the 3500 rack; communicates with other modules (Monitor, Keyphasor) and the system framework. |
| Dimensions (H x W x D) | Approximately 310 mm x 20 mm x 200 mm (Standard 3500 series rack slot size) |
| Weight | Approximately 0.45 kg (1.0 lb) |
| Part Number | 133811-03 (Revision 03) |
| Rack Compatibility | Bently Nevada 3500 Series Racks |
Application Scenarios
The 3500/62 module is deployed in critical rotating machinery across various industries where continuous vibration monitoring is essential for safety and reliability:
Power Generation:
Gas & Steam Turbines: Monitoring shaft vibration and bearing cap vibration (using proximity probes and seismics, respectively) to prevent catastrophic failure.
Generators & Large Pumps: Protecting auxiliary equipment by monitoring overall vibration levels.
Oil & Gas:
Centrifugal & Reciprocating Compressors: Essential for detecting surge, imbalance, and mechanical looseness which can lead to unplanned shutdowns.
Pipeline & Injection Pumps: Monitoring bearing and shaft health to ensure continuous operation.
Petrochemical & Refining:
FCCU Expanders, Critical Blowers, and Fans: Protecting high-speed, high-value assets from vibration-related damage, ensuring process continuity and safety.
General Industrial:
Large Motors, Gearboxes, and Paper Machine Rolls: Used wherever predictive maintenance and protection of capital-intensive rotating equipment are required.
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