Bently Nevada 991-06-50-01-00 Thrust Transmitter

The 991-06-50-01-00 operates as a loop-powered thrust transmitter within the Bently Nevada 991 series. Plant operators depend on this unit for continuous axial position monitoring on steam turbines and centrifugal compressors. Consequently, it transforms eddy current probe signals into standard 4-20 mA outputs.

Technical Specifications

Parameter	Specification
Measurement Type	Axial Thrust Position
Input Signal	Eddy current probe input
Output Signal	4-20 mA, loop-powered
Supply Voltage	12 to 30 VDC
Measurement Range	0 to 25.4 mm (0 to 1.0 in)
Mounting Type	DIN rail or panel mount
Weight	Approximately 400 g
Operating Temperature	-40 °C to +85 °C
Housing Material	Industrial-grade polymer
Terminal Type	Screw terminals
Accuracy	±1% of full scale
Isolation	Galvanically isolated

Operating Principle

This transmitter receives input from a Bently Nevada proximity probe and oscillator-demodulator. It processes the displacement signal and produces a proportional current loop output. Meanwhile, the loop-powered configuration eliminates the need for separate power wiring.

Interface and System Integration

The 991-06-50-01-00 interfaces directly with PLCs, DCS platforms, and plant protection systems. Screw terminals streamline field wiring and routine maintenance tasks. Furthermore, DIN rail mounting conserves valuable cabinet space in control rooms.

Environmental and Application Notes

The industrial-grade housing resists dust, moisture, and typical plant contaminants. Additionally, the wide temperature range supports both indoor and outdoor installations. Therefore, this transmitter delivers dependable performance in demanding industrial environments.