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Bently Nevada 990-04-50-01-00 Vibration Transmitter

The Bently Nevada 990-04-50-01-00, also cataloged as the 990-04 Vibration Transmitter, operates as a dedicated hardware component for vibration signal conversion and mechanical condition monitoring within Bently Nevada vibration monitoring systems.

Hardware Specifications

Parameter	Specification
Model	990-04-50-01-00
Brand	Bently Nevada
Product Type	Vibration Transmitter
Origin	USA
Weight	0.44 kg
Dimensions	10 x 7.5 x 5.6 cm
Operating Temp	Not specified
Power Consumption	Current output limitation: 23 mA typical
Full-scale Option	0-4 mils pp (0-100 um pp)
System Length Option	5.0 metres (16.4 feet)
Mounting Option	35 mm DIN rail clips
Agency Approval Option	Not required
Output Signal Limiting	23 mA typical current limiting
Application Interface	Vibration measurement signal transmission

Eddy-Current Measurement and Mechanical Vibration Monitoring

The 990-04-50-01-00 transmitter processes vibration input signals from compatible eddy-current proximity measurement systems and converts mechanical shaft displacement data into proportional electrical output signals. Moreover, the module maintains measurement scaling based on the selected full-scale range of 0-4 mils pp (0-100 um pp).

The transmitter supports vibration monitoring applications where rotor displacement information requires conversion into an industrial monitoring signal. Therefore, proper probe configuration, cable routing, and signal grounding directly influence measurement accuracy.

The Bently Nevada vibration monitoring architecture uses eddy-current probe scaling methods and gap voltage validation principles for mechanical condition analysis. In addition, the probe system typically references gap voltage targets around -10 VDC to confirm correct probe operating position and measurement range.

Frequently Asked Questions

Q: What vibration measurement range does the 990-04-50-01-00 support?
A: The configured full-scale measurement option is 0-4 mils pp (0-100 um pp).

Q: What mounting method does this vibration transmitter use?
A: The unit uses 35 mm DIN rail clips for mechanical installation.

Q: Does the transmitter provide current limiting protection?
A: Yes. The output circuit includes current limiting with a typical value of 23 mA.

Field Installation Guidelines

Install the 990-04-50-01-00 on a suitable 35 mm DIN rail mounting structure and verify mechanical fixation before connecting field wiring.

Use shielded signal cables where required by the monitoring system design. Connect cable shields according to the plant grounding standard to reduce electrical interference.

Route vibration signal wiring separately from high-voltage power cables and switching circuits. In addition, confirm proximity probe wiring polarity, cable continuity, and terminal identification before system commissioning.

Verify the configured system length option of 5.0 metres (16.4 feet) matches the connected probe extension arrangement. Perform signal validation after installation to confirm correct vibration measurement behavior.

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