Bently Nevada 990-05-XX-03-CN 990 Series Vibration Transmitter | 4-20mA

Product Overview

The Bently Nevada 990-05-XX-03-CN (104M1359-01) serves as a core component for machinery condition monitoring, converting radial vibration into a proportional 4-20 mA DC output. This loop-powered transmitter eliminates the need for external Proximitor units or rack-based monitoring, allowing direct integration into a PLC or DCS. This specific CN-variant meets localized industrial standards while maintaining the high-precision eddy current measurement technology Bently Nevada pioneered. We supply this unit as 100% brand new, original factory stock manufactured in the USA.

Part Number Breakdown

The 990-05-XX-03-CN configuration identifies the following technical specifications:

Technical Specifications

This transmitter provides high-linearity signal conditioning for industrial rotating assets:

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

• Measurement Range: 0 to 5 mils peak-to-peak.

• Dimensions: 2.2 cm x 12.4 cm x 12.6 cm.

• Weight: 0.1 kg (Unit only).

• Power Supply: 12 to 35 Vdc (Loop-powered).

• Input Device: 3300 or 3300 XL Proximity Probe.

• Country of Origin: USA.

Engineering Advantages

• Reduced System Footprint: The ultra-slim 2.2 cm width allows for high-density mounting within local junction boxes. Engineers maximize cabinet space by utilizing the integrated 35 mm DIN rail clips for rapid installation.

• Direct Field-to-Controller Interface: By outputting a 4-20 mA current loop, the 990-05-XX-03-CN removes the complexity of specialized vibration monitoring hardware. It drives the signal over standard twisted-pair wiring, ensuring high noise immunity across long distances.

• Buffered Output Support: The transmitter includes a separate buffered voltage signal. This allows maintenance teams to connect portable vibration analyzers for diagnostic "deep dives" without disconnecting the primary safety loop or interrupting the 4-20 mA signal to the DCS.

• High-Speed Asset Protection: The transmitter provides real-time data for centrifugal compressors and pumps. Its fast response time ensures the control system detects sudden vibration excursions immediately, preventing catastrophic machinery failure.

FAQs

• Does this transmitter replace the 3300 XL Proximitor?

  Yes, in applications where you only require a 4-20 mA signal. The 990 transmitter combines the driver and signal conditioner, so you do not need a separate Proximitor to send vibration data to your PLC.

• How do I verify the probe gap during installation?

  Connect a multimeter to the "Prox" and "COM" terminals. This measures the DC gap voltage, allowing you to position the probe at the precise electrical center of the linear range before finalizing the installation.

• What system length must I use with the "XX" code?

  You must match the transmitter to your cable length. If the code is 50, use a 5-meter probe/cable system; if 70, use a 7-meter system. Mixing lengths will invalidate the calibration.

• Is this unit an authentic Bently Nevada product?

  We guarantee the 990-05-XX-03-CN is 100% brand new and genuine. Each unit undergoes factory calibration in the USA to ensure full compliance with machinery protection standards.