The Bently Nevada 3500/42M (Part Number 140734-02) is a Proximitor Seismic Monitor designed for the 3500 series machinery protection system. This module provides continuous monitoring of seismic vibration and shaft absolute vibration, ensuring critical rotating machinery is protected against excessive vibration levels.

Features

• Supports both 4-20 mA and mV/mm/s velocity sensor inputs.
• Provides -24 Vdc transducer power supply for connected sensors.
• Configurable vibration monitoring ranges, typically up to 0-20 mm/s (RMS) or 0-10 g (RMS).
• High measurement accuracy of ±1% of full scale.
• Integrated signal processing for reliable vibration analysis in industrial environments.

Technical Specifications

Installation Guidelines

• Ensure the 3500 rack is powered down before inserting or removing the 3500/42M module to prevent electrical damage.
• Use appropriate ESD protection when handling the module to avoid damage to internal circuitry.
• Ensure the module is fully seated in the rack slot and the front panel screws are tightened to maintain proper grounding and mechanical stability.
• Route signal cables away from high-voltage lines and high-EMI sources to maintain measurement integrity.
• Verify that the transducer wiring matches the specific input configuration requirements for the 3500/42M.

FAQ

What is the primary function of the 3500/42M?
The 3500/42M is a Proximitor Seismic Monitor used to measure vibration levels in rotating machinery, providing alarm and trip signals to the 3500 system.

Does this module require external power?
The module is powered by the 3500 rack backplane, but it provides a -24 Vdc supply to power the connected seismic or proximity transducers.