3500/22-01-01-02 Monitoring System Module
Description:
The 3500/22-01-01-02 is a specific part number for a Velocity Input / 4-20 mA Input Module used within the Bently Nevada 3500 Machinery Monitoring System. This module is a versatile interface designed to monitor two different types of signals critical for machinery protection and process monitoring.
It features a dual-channel design where each channel can be independently configured to accept either:
A signal from a velocity seismic transducer (e.g., an accelerometer with an integral preamplifier), which measures casing or absolute vibration.
A 4-20 mA analog input from a wide variety of process transmitters (e.g., for pressure, temperature, flow, or level).
This flexibility allows the module to integrate vibration-based machinery protection with vital process parameter monitoring within a single, unified system.
Parameters & Specifications
The following table details the key physical and general parameters of the module.
| Parameter | Specification |
|---|---|
| Part Number | 3500/22-01-01-02 |
| Module Type | Velocity Input / 4-20 mA Input Module |
| Compatibility | Bently Nevada 3500 Rack Frame |
| Slot Requirement | Single Slot |
| Typical Dimensions (H x W x D) | Approx. 193 mm x 27 mm x 170 mm (7.6 in x 1.06 in x 6.7 in) |
| Typical Weight | Approx. 0.3 kg (0.66 lbs) |
| Input Channels | 2 independent channels |
| Velocity Input | Accepts signals from velocity transducers (e.g., 100 mV/in/sec). Provides power for ICP®/IEPE type sensors. |
| 4-20 mA Input | Accepts standard 4-20 mA analog signals. Can be scaled to engineering units (e.g., PSI, °C, GPM). |
| Power Supply | Powered by the 3500 system backplane |
| Operating Temperature | -30°C to +65°C (-22°F to +149°F) |
| Primary Output | Scaled process variables and alarm status to the 3500 Monitor and Framework software. |
Note: The exact dimensions and weight can vary slightly. For precise mechanical details for installation, it is always recommended to consult the official product datasheet or installation guide.
Application Scenarios
The 3500/22 module is deployed in scenarios requiring both mechanical vibration and process parameter monitoring on equipment that may not have a rotating shaft or where casing vibration is the primary concern.
Casing Vibration Monitoring on Turbines and Compressors: Provides backup or primary protection by monitoring the absolute vibration of the machine's casing or bearing housings, complementing shaft vibration data from proximity probes.
Monitoring of Pumps, Fans, and Electric Motors: Ideal for machines where shaft relative vibration monitoring is not feasible. It protects against mechanical failures caused by imbalance, misalignment, or bearing issues by measuring the vibration velocity of the structure.
Process Parameter Integration: The 4-20 mA capability allows a single module to monitor critical process conditions directly alongside vibration, such as:
Bearing Temperature: Monitoring RTD or thermocouple transmitters.
Lube Oil Pressure: Ensuring adequate lubrication pressure is maintained.
Cooling Water Flow: Monitoring flow rates for heat exchangers.
Differential Pressure: Across filters or for pumps.
Ancillary Equipment Protection: Used to monitor motors, gearboxes, and other auxiliary equipment that are critical to the main process unit's operation.
Plant-Wide Machinery Monitoring: Its dual-function nature makes it a cost-effective and space-efficient solution for monitoring a wide range of assets in industries like oil & gas, power generation, water treatment, and manufacturing.
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