Bently Nevada 991-50-XX-01-00 991 Series Thrust Transmitter

Product Overview

The Bently Nevada 991-50-XX-01-00 provides critical axial position monitoring for industrial rotating machinery. This transmitter simplifies your monitoring architecture by converting a 3300 XL 8mm Proximity Probe signal into a linearized 4 to 20 mA output. This allows for direct integration with DCS or PLC systems without the overhead of a traditional rack-based monitor. We supply this component in 100% Brand New and Original factory condition, ensuring your critical assets remain protected by genuine OEM hardware.

Part Number Breakdown

The 991 series uses a modular code to define measurement range and physical installation requirements:

Technical Specifications

The 991-50-XX-01-00 operates within strict tolerances to ensure measurement repeatability:

• Output Signal: 4 to 20 mA DC (Linearized displacement)

• Measurement Range: 1.0 mm - 0 - 1.0 mm (Extended range)

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

• System Length Compatibility: Configured for 5.0 or 9.0 meter total electrical length

• Input Power: +17.5 to +30 Vdc

• Weight: 0.46 kg (1.01 lbs)

• Mounting: Standard 35 mm DIN-rail (Option 01)

Engineering Advantages

• Extended Measurement Scale: The "50" option provides a broader 1.0-0-1.0 mm range compared to standard units. This solves the challenge of monitoring machines with higher axial float or thermal growth during startup.

• Elimination of Dedicated Racks: This transmitter sends vibration and position data directly to your control system. By removing the need for a 3500-series rack, you reduce overall system complexity and hardware costs.

• Simplified Troubleshooting: The unit includes a BNC connector that provides a raw buffered signal. Technicians can plug in a portable vibration analyzer directly at the transmitter for field diagnostics without disconnecting any wiring.

• EMI/RFI Immunity: Engineered with advanced shielding, the 991 series maintains signal integrity even when installed near high-frequency variable speed drives (VSDs) or other sources of industrial noise.

FAQs

• Can I use this with a 3300 XL 5mm probe?

  No. This transmitter is specifically calibrated for use with 3300 XL 8mm probes. Using a different probe diameter will cause severe non-linearity in the 4-20 mA output.

• What is the "XX" variable in the part number?

  The "XX" must be specified at the time of order to match your total system length (usually 50 for 5.0 meters or 90 for 9.0 meters). The transmitter, extension cable, and probe MUST all share the same electrical length.

• Is this unit suitable for outdoor installation?

  The transmitter must be installed in an enclosure (NEMA 4X or IP66) if used outdoors or in wash-down areas to protect the internal electronics and terminal connections from moisture.

• Is the product shipped with factory calibration?

  Yes. Every 991-50-XX-01-00 is Brand New and comes factory-calibrated. It arrives in original Bently Nevada packaging with the manufacturer's standard 12-month warranty.