Configured for seismic vibration measurement in 3500 monitoring systems, the Bently Nevada 3500/44M 176449-03 (3500/44M Vibration Monitor) provides direct physical and electrical execution of accelerometer signal processing for machinery protection.

Model Identification

• Model: 3500/44M

• Part Number: 176449-03

• Product Type: Vibration Monitor Module

• System Family: 3500 System

Hardware Specifications

Mechanical Monitoring & TSI Integration

The 3500/44M module processes inputs from seismic accelerometers to provide rotor dynamics and casing vibration analysis. Operators must verify proper eddy-current probe scaling if the system configuration includes proximity inputs alongside seismic data. Installers should perform gap voltage validation for any associated displacement transducers, ensuring a -10 VDC baseline is maintained for linear measurement. The module features integrated cross-talk suppression logic, preventing signal bleed between high-sensitivity channels and ensuring vibration frequency spectrum purity during continuous machinery monitoring.

Ordering Info

• One (1) 3500/44M Vibration Monitor Module.

• I/O module for seismic transducer interface.

• Installation and configuration documentation.

Field Installation Guidelines

• Module Insertion: Secure the module in the 3500 rack; ensure the backplane connector is fully seated to guarantee bus communication.

• Signal Wiring: Terminate accelerometer wiring to the I/O module using specified shielded coaxial cable to minimize external interference.

• Grounding: Verify that the 3500 rack ground integrity is intact to protect low-voltage vibration signals from potential difference fluctuations.

• Configuration: Map transducer sensitivity parameters and alarm logic using the 3500 Rack Configuration software before signal validation.

Frequently Asked Questions

• Is the 3500/44M hot-swappable? Yes, the 3500 system design permits hot-swapping of this monitor module without necessitating power-down of the entire rack.

• How are alarm setpoints determined? Alarms are set in the 3500 software based on established machinery vibration limits and displacement thresholds.

• Can this module handle high-frequency transients? Yes, the signal conditioning circuitry is designed to track high-frequency vibration data required for detailed rotor analysis.

• Is the IP65 rating maintained during rack installation? The IP65 rating applies to the module design; ensure the host cabinet provides equivalent protection for the electronics.

• How are sensor faults identified? The module performs continuous self-diagnostics; sensor "Not OK" conditions are signaled via the front-panel LED and communicated to the system software.

• Does it require external power for the sensors? The module provides the necessary excitation voltage for the connected seismic accelerometers directly via the I/O module.

• Can I monitor both proximity and seismic inputs? The 3500/44M is specialized for seismic inputs; check the module and I/O pairing requirements for specific sensor compatibility.

• What if the signal appears noisy? Inspect all cable shields for proper termination at the I/O module ground and ensure no proximity to high-power motor leads.