The Bently Nevada 991-06-50-01-00 is a dedicated thrust transmitter designed for continuous monitoring of axial position in rotating machinery. This unit provides a reliable 4-20 mA output proportional to the measured thrust displacement, facilitating integration into PLC, DCS, or SCADA systems for machinery protection and condition monitoring.
Features
Provides a linear 4-20 mA output proportional to the thrust position.
Features non-interacting external adjustments for zero and span, allowing for precise calibration without disrupting the loop.
Designed for standard industrial mounting using 35 mm DIN-rail clips.
Includes current limiting circuitry to protect the loop and connected instrumentation.
Compatible with standard proximity probe systems for accurate non-contact displacement measurement.
Applications
Axial position monitoring for centrifugal compressors, turbines, and pumps.
Integration into plant-wide machinery protection systems.
Retrofitting legacy monitoring loops with modern 4-20 mA transmitter technology.
Technical Specifications
Product Model
991-06-50-01-00
Measurement Range
0.6 to -0.6 mm
Cable Length
5.0 meters (16.4 feet)
Mounting
35 mm DIN-rail
Maximum Loop Resistance
1,000 Ohm (including cable at 35 Vdc)
Current Limiting
23 mA typical
Minimum Target Size
9.5 mm (0.375 in) diameter
Installation Guidelines
Ensure the transmitter is mounted in a clean, dry, and vibration-isolated environment.
Use shielded twisted-pair cabling for the 4-20 mA loop to minimize electromagnetic interference (EMI).
Verify that the proximity probe target area meets the minimum diameter requirement of 9.5 mm to ensure measurement accuracy.
Power down the loop before making any wiring connections or adjustments to the transmitter terminals.
Ensure proper grounding of the cable shield at the control system end to prevent ground loops.
FAQ
What is the primary function of the 991-06-50-01-00? This device acts as a signal converter, taking input from a proximity probe and outputting a 4-20 mA signal that represents the axial thrust position of a machine shaft.
Can the zero and span be adjusted? Yes, the unit features non-interacting external adjustments, allowing you to calibrate the transmitter output without affecting the zero setting.
