Bently Nevada 990-05-50-01-CN 990 Series Vibration Transmitter

Product Overview

The Bently Nevada 990-05-50-01-CN serves as a high-precision, two-wire vibration transmitter designed for immediate machinery health assessment. It accepts input from 3300 NSv proximity probes and converts the signal into a standard 4-20 mA DC output proportional to peak-to-peak vibration. This compact, loop-powered device eliminates the need for external Proximitor units, allowing direct integration into a PLC or DCS for early detection of potential machinery faults. We supply this unit as 100% brand new and original equipment.

Part Number Breakdown

The 990-05-50-01-CN follows a specific configuration for 5-meter monitoring systems:

Technical Specifications

The transmitter utilizes rugged materials to ensure high-linearity data in industrial environments:

• Output Signal: 4-20 mA DC (Proportional to vibration amplitude).

• Input Compatibility: Bently Nevada 3300 NSv Proximity Probe.

• Operating Temperature: -40°C to 85°C (-40°F to 185°F).

• Probe Tip Material: Polyphenylene sulfide (PPS).

• Case Material: AISI 303 or 304 Stainless Steel (SST).

• Cable Insulation: Fluoroethylene propylene (FEP).

• Humidity Resistance: 100% condensing (potted construction).

• Total Weight: 0.82 kg (Typical system weight).

Engineering Advantages

• Optimized for Restricted Access: This transmitter specifically interfaces with the 3300 NSv (Narrow Side View) system. It maintains measurement accuracy on shafts with small diameters or in confined spaces where standard probes suffer from side-view interference.

• Environmental Resilience: The potted construction protects internal circuitry from high-humidity and condensing environments. The SST housing and PPS tip resist chemical corrosion, ensuring long-term durability when mounted directly on bearing housings.

• Simplified Installation: The 990-05-50-01-CN supports both DIN-rail mounting for cabinet efficiency and bulkhead mounting for secure field installation. The two-wire, loop-powered design reduces wiring costs and simplifies the overall architecture.

• Robust Signal Integrity: The FEP-insulated 75Ω coaxial cable maintains signal purity across the 5-meter system length. The transmitter resists electromagnetic interference (EMI), delivering a stable 4-20 mA signal over long distances to the control room.

FAQs

• Does this transmitter require an external power supply?

  No. The 990-05-50-01-CN is loop-powered. It draws its required operating voltage directly from the 4-20 mA signal loop provided by the PLC or DCS analog input card.

• How do I verify the probe gap during commissioning?

  The transmitter includes dedicated terminals to measure the DC gap voltage. Use a digital multimeter to confirm the probe resides in the center of its linear range before finalized mounting.

• What is the maximum tensile strength of the probe lead?

  The probe case to probe lead connection withstands a maximum tensile force of 222 N (50 lbf), preventing damage during cable routing through tight conduit.

• Can I use this unit with a standard 8mm 3300 XL probe?

  No. This model is factory-calibrated for the 3300 NSv probe system. Using a standard 8mm probe will lead to significant calibration errors and inaccurate vibration data.