Description
Description
The Bently Nevada 3500/42M 176449-02 is a high-performance Proximitor/Seismic Monitor module designed for the 3500 Machinery Protection System. This 4-channel module provides continuous monitoring of vibration, position, and seismic measurements by accepting signals from proximity probes, Velomitor sensors, accelerometers, and other compatible transducers. It conditions incoming signals, performs real-time measurement calculations, and compares results against user-configurable alarm setpoints to support critical machinery protection and condition monitoring programs.
Features
- 4-channel monitoring capability for high-density rack configurations.
- Supports diverse measurement types: radial vibration, shaft absolute vibration, thrust position, differential expansion, velocity, acceleration, and eccentricity.
- Independent channel configuration via 3500 Rack Configuration Software.
- Internal safety barriers (indicated by -02 suffix) for hazardous area isolation.
- Buffered outputs on the front panel for portable vibration analyzer connection without signal interruption.
- Programmable alarm setpoints (Alert and Danger) and time delays to prevent false trips.
Applications
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Power Generation: Monitoring stability of large steam and gas turbines and generators.
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Oil & Gas: Protection for high-pressure compressors, pumps, and critical rotating assets in refineries and offshore platforms.
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Manufacturing: Asset protection for heavy industrial rotating machinery.
Technical Specifications
| Parameter |
Specification |
| Model |
3500/42M 176449-02 |
| Channels |
4 |
| Operating Temperature |
-30 degC to +65 degC |
| Storage Temperature |
-40 degC to +85 degC |
| Humidity |
95% Non-condensing |
| Power Consumption |
7.7 Watts (typical) |
| Transducer Power Supply |
-24 Vdc |
| Output Impedance |
550 Ohm |
Installation Guidelines
- Ensure the 3500 rack is powered down before inserting or removing the module to prevent electrical damage.
- The module must be seated correctly in the designated rack slot; ensure the backplane connector is fully engaged.
- Use shielded cabling for all transducer inputs to minimize EMI/RFI interference in industrial environments.
- Channel pairs (1/2 and 3/4) must be configured with compatible monitoring functions.
- Maintain proper ventilation within the cabinet to stay within the specified operating temperature range.
FAQ
What does the -02 suffix indicate?
The -02 suffix denotes that the module is equipped with an I/O module featuring internal safety barriers, suitable for isolating signals in hazardous environments.
Can I use this for seismic monitoring?
Yes, the 3500/42M is specifically designed to accept inputs from seismic transducers to detect and analyze ground or housing vibrations.
How do I configure the alarm setpoints?
Alarm setpoints and time delays (1 to 60 seconds) are programmed using the Bently Nevada 3500 Rack Configuration Software.
