Bently Nevada 991-01-XX-01-00 Vibration Transmitter

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DescriptionThe Bently Nevada 991-01-XX-01-00 Vibration Transmitter is a two-wire, loop-powered device engineered for the continuous monitoring of rotating machinery. It...

SKU: 991-01-XX-01-00

Manufacturer: Bently Nevada
Product No.: 991-01-XX-01-00
Product Type: Vibration Transmitter
Product Origin: USA
Payment:T/T, Western Union
Weight: 460g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Description

The Bently Nevada 991-01-XX-01-00 Vibration Transmitter is a two-wire, loop-powered device engineered for the continuous monitoring of rotating machinery. It is specifically designed to interface with 3300 NSv proximity probes, converting raw vibration signals into a standard 4-20 mA output. This output is directly compatible with industrial control systems such as PLCs, DCS, and SCADA, providing a robust solution for machinery protection in environments like compressors, pumps, and fans.

Features

Loop-Powered Design: Operates on a 24 VDC nominal loop, eliminating the requirement for external power supplies and simplifying field wiring.
Signal Processing: Converts proximity probe inputs into a proportional 4-20 mA signal for vibration amplitude.
Diagnostic Circuitry: Features an integrated Not OK/Signal Defeat circuit to prevent false alarms during sensor or cable faults.
Dynamic Output: Provides both dynamic vibration and gap voltage outputs for advanced diagnostics and signal analysis.
Calibration: Equipped with a test pin for quick and efficient field calibration.

Applications

This transmitter is ideal for industrial plant applications where reliable, cost-effective vibration monitoring is required for balance-of-plant rotating equipment, including centrifugal compressors, industrial pumps, cooling fans, and blowers.

Technical Specifications

Model	991-01-XX-01-00
Brand	Bently Nevada
Output	4-20 mA (proportional to vibration)
Power Supply	Loop-powered (24 VDC nominal)
Operating Temperature	-40 degC to +85 degC
System Compatibility	3300 NSv Proximity Probes

Installation Guidelines

Mounting: The unit supports standard DIN-rail or bulkhead mounting configurations. Ensure the mounting surface is clean and provides adequate heat dissipation.
Wiring: Use shielded instrumentation cable to minimize EMI/RFI interference. Ensure proper grounding of the cable shield at the control system end only to prevent ground loops.
Handling: As a precision electronic component, handle with care to avoid ESD damage. Ensure the system is powered down before making or breaking electrical connections.
Environment: While robust, the unit should be installed in a location protected from direct moisture and extreme corrosive atmospheres unless housed in an appropriate NEMA-rated enclosure.

FAQ

What is the primary function of the 991-01-XX-01-00?

This module acts as a signal conditioner that takes the raw signal from a 3300 NSv proximity probe and converts it into a 4-20 mA signal, which is the industry standard for integration into PLC or DCS monitoring systems.

Does this transmitter require an external power supply?

No, this is a two-wire, loop-powered device. It derives its operating power directly from the 4-20 mA current loop, which simplifies installation and reduces cabling requirements.

What should I do if the Not OK circuit triggers?

The Not OK circuit indicates a fault in the probe, extension cable, or the transmitter itself. Check the integrity of the proximity probe and the cabling connections to the transmitter before verifying the transmitter's internal diagnostics via the test pin.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.