Bently Nevada 3500/42M 140734-02+128229-01 Proximitor Seismic Monitor

The Bently Nevada 3500/42M Proximitor Seismic Monitor is a four-channel module designed for continuous machinery protection and condition monitoring. It accepts input signals from proximity and seismic transducers, providing high-accuracy vibration, position, and acceleration measurements. By comparing these signals against user-defined alarm setpoints, the module ensures proactive maintenance and operational safety.

Equipped with advanced filtering, signal conditioning, and real-time diagnostics, the 3500/42M is essential in applications demanding precise vibration analysis, including turbines, compressors, motors, and gearboxes.

Technical Specifications

Applications

• Steam and gas turbines

• Centrifugal and reciprocating compressors

• Large motors and generators

• Pumps and fans

• Gear-driven equipment

• Critical rotating machinery in oil & gas, power, and petrochemical industries

Advantages

• Real-time machinery protection and diagnostics

• Simultaneous monitoring of vibration, position, and acceleration

• Configurable dual-function channel pairing

• High accuracy and fast update rates (≤100 ms)

• Multiple alarm thresholds per channel (alert/danger)

• Wide dynamic frequency response

• Modular design compatible with 3500 System architecture

• Redundant communication options with TX/RX indicators

FAQ

Q1: What sensors are compatible with the 3500/42M Proximitor Seismic Monitor?

A1: It supports proximity, acceleration, and velocity transducers including Proximitor®, Velomitor®, and Seismoprobe® sensors.

Q2: Can the module operate in hazardous environments?

A2: Yes, it is certified for use in Class I, Div 2 and ATEX/IECEx Zone 2 environments, with internal barrier options available.

Q3: How many channels does the 3500/42M support?

A3: It supports 4 channels, which can be configured in pairs to perform up to two monitoring functions simultaneously.

Q4: What kind of outputs does the module provide?

A4: It provides 4–20 mA recorder outputs and buffered transducer outputs for each channel.

Q5: How are alarm thresholds configured?

A5: Alarm setpoints (alert and danger) are user-programmable via the 3500 Rack Configuration Software.

Q6: What is the frequency response range of the monitor?

A6: It supports a wide frequency range up to 30,000 Hz depending on sensor type and configuration.

Q7: Is the system immune to short circuits on outputs?

A7: Yes, the monitor continues to operate correctly even with shorted recorder outputs.

Q8: What is the role of the 128229-01 I/O module?

A8: It provides internal terminations for Proximitor and seismic sensors, enabling direct sensor integration.

Q9: How often does the monitor update measurement values?

A9: The update rate is approximately 100 ms or less per channel.

Q10: Is the module compatible with shaft absolute measurements?

A10: Yes, it supports shaft absolute vibration and velocity monitoring with specific I/O module configurations.