Bently Nevada 990-04-70-01-00 990 Vibration Transmitter

Description

The 990-04-70-01-00 vibration transmitter provides a simplified method for integrating shaft vibration monitoring into industrial automation systems. Developed by Bently Nevada, the unit converts vibration measurements from a 3300 NSv proximity probe into a linear 4 to 20 mA output signal for machine protection and condition monitoring applications.

This transmitter configuration is commonly installed on rotating equipment where continuous vibration trending is required without deploying a full rack-based monitoring system. The compact housing and DIN rail mounting arrangement support installation inside OEM control cabinets, compressor skids, and packaged machinery panels.

The transmitter operates from a standard DC loop supply and combines the Proximitor electronics and signal conditioning circuitry into a single encapsulated assembly. Maintenance personnel can also access dynamic vibration information through the PROX OUT connection during commissioning and troubleshooting procedures.

The 0-4 mils pp full-scale range makes this version suitable for machinery applications requiring tighter vibration measurement resolution.

Operational Features

• Continuous vibration signal conversion
• Linear 4 to 20 mA output transmission
• Compatible with 3300 NSv transducer systems
• Integrated Proximitor functionality
• DIN rail mounting design
• Dynamic vibration signal access
• Compact encapsulated transmitter body
• External calibration adjustments
• Probe fault indication logic
• Low-maintenance two-wire configuration

Common Industrial Uses

Ordering Information

Technical Specifications

Connection Overview

Installation Recommendations

Install the transmitter in a vibration-protected control enclosure with adequate grounding and cable shielding practices. The DIN rail mounting arrangement allows quick integration into existing automation panels.

Separate low-level transducer wiring from high-current motor cables to reduce electromagnetic interference. During startup, verify the probe gap and confirm stable loop current before placing the machine into service.

For diagnostic waveform measurements, use suitable isolated monitoring equipment connected to the PROX OUT interface. Protect exposed connectors from excessive moisture and contamination in high-humidity process environments.

FAQ

What measurement range does this configuration use?
This model uses a 0-4 mils peak-to-peak vibration range.

Which probe series is compatible with the transmitter?
It is designed for Bently Nevada 3300 NSv proximity probe systems.

Can the unit be mounted inside a standard control cabinet?
Yes. The transmitter includes DIN rail mounting clips for panel installation.

What output signal is provided to the control system?
The transmitter outputs a proportional 4 to 20 mA vibration signal.

Is the transmitter suitable for compressor monitoring?
Yes. It is commonly used on centrifugal compressors and auxiliary rotating equipment.

Does this version include hazardous area certification?
No. The -00 approval option indicates standard non-hazardous configuration.

What power supply range is required?
The transmitter operates from +12 to +35 Vdc.

Can maintenance teams access dynamic vibration signals?
Yes. Diagnostic signals are available through the PROX OUT connection.

What is the supplied system cable length?
This configuration uses a 7.0 metre system length.

How is the transmitter installed?
The unit mounts directly onto a 35 mm DIN rail.

Is the transmitter designed for continuous monitoring?
Yes. It supports ongoing vibration trending in industrial machinery systems.

What environmental conditions can the unit withstand?
The transmitter operates in temperatures from -35 degC to +85 degC.