Bently Nevada 990-05-50-01-00 2-Wire Vibration Transmitter | 3300 XL

Product Overview

The Bently Nevada 990-05-50-01-00 acts as a high-precision interface between rotating machinery and your plant control system. This 2-wire vibration transmitter converts the complex eddy current signal from a proximity probe into a standard 4-20 mA loop current. It provides continuous monitoring of radial vibration or axial position for balance-of-plant assets where a dedicated rack-based monitor is not cost-effective. We supply this unit as 100% Brand New and Original, manufactured in the U.S.A., ensuring the highest signal integrity for your industrial automation loop.

Part Number Breakdown

The 990 series follows a modular configuration to match specific machine geometries and system architectures:

Technical Specifications

This transmitter delivers precise performance in demanding electrical environments:

• Output Signal: 4-20 mA DC loop current (Proportional to 0-5 mils vibration).

• Minimum Target Size: 9.5 mm (0.375 in) diameter.

• System Calibration: Factory-tuned for 5.0-meter total system length.

• Power Supply: Accepts loop voltage from +12 to +35 Vdc.

• Installation: Integrated clips for standard 35 mm DIN rail mounting.

• Weight: 0.43 kg (Net) / 0.8 kg (Shipping).

• Certificate of Origin: Made in U.S.A. (COO available upon request).

Engineering Advantages

The 990-05-50-01-00 solves critical industrial integration challenges through robust design:

• Direct PLC/DCS Integration: The 4-20 mA output allows you to wire the transmitter directly into standard analog input cards. This eliminates the requirement for expensive, proprietary monitoring racks and simplifies the overall system architecture.

• Simplified Field Wiring: The 2-wire, loop-powered design draws power directly from the signal loop. This reduces the number of cable runs required per sensor point, lowering both material costs and installation labor.

• Diagnostic Accessibility: Each unit includes a buffered "Prox Out" terminal. Maintenance teams can connect portable data collectors or oscilloscopes to this port to view raw vibration waveforms (orbits) without disconnecting or interrupting the protection loop.

• High Noise Immunity: Advanced internal shielding rejects electromagnetic interference (EMI) generated by nearby motors and variable frequency drives (VFDs), preventing false alarms and ensuring signal stability.

FAQs

Must I use a specific probe with this transmitter?

Yes. The 990-05 transmitter requires a 3300 XL 8mm Proximity Probe. Because the unit is factory-calibrated for the 3300 XL probe’s specific impedance and a 5.0-meter system length, using mismatched probes or different cable lengths will cause significant measurement errors.

What happens if the probe or cable is disconnected?

The transmitter incorporates a "NOT OK" circuit. If the system detects a probe or extension cable failure (open or short circuit), the loop current drives below 3.6 mA. This allows your DCS to distinguish between a "Zero Vibration" state and a "Sensor Fault."

Can I mount this transmitter in a high-temperature area?

While the transmitter is rugged, we recommend mounting it in a NEMA 4X or IP65 enclosure if the local ambient temperature exceeds 85°C. This protects the 100% brand-new internal electronics and ensures the longevity of the factory calibration.

Is this a refurbished or original Bently Nevada part?

We supply only 100% Brand New and Original hardware. Each unit arrives in original factory packaging with an intact serial number, ensuring you receive a genuine product with full performance specifications as manufactured in the U.S.A.