The Bently Nevada 991-01-XX-01-00 MOD: 284318-01, also cataloged as the 991 Thrust Transmitter, operates as a dedicated hardware component for axial shaft displacement measurement using a 3300 NSv proximity probe within Bently Nevada TSI monitoring systems.
Hardware Specifications
Parameter
Specification
Model
991-01-XX-01-00 MOD: 284318-01
Brand
Bently Nevada
Product Type
Thrust Transmitter
Origin
USA
Weight
0.5 kg
Dimensions
Estimated shipping size: 10 x 7.4 x 5.8 cm
Operating Temp
Not specified
Power Consumption
Requires +12 to +35 VDC input at transmitter terminal
Input Signal
Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable
Output Signal
4-20 mA proportional thrust position signal
Current Limiting
23 mA typical
System Length Option
5.0 meters / 7.0 meters
Mounting Option
35 mm DIN-rail clips
Eddy-Current Probe Scaling and Rotor Position Measurement
The 991 Thrust Transmitter processes the displacement signal from a Bently Nevada 3300 NSv eddy-current proximity probe and converts shaft axial movement into a proportional electrical output. The transmitter maintains probe scaling characteristics to provide consistent thrust position measurement.
The input circuit interfaces with the proximity probe and extension cable assembly while maintaining signal conditioning for turbine and rotating equipment monitoring applications. The design supports verification of probe gap conditions, including typical Bently Nevada -10 VDC gap voltage targets during installation calibration.
The transmitter architecture is configured for TSI applications where rotor dynamics, axial position changes, and mechanical movement trends require continuous monitoring. Signal conditioning functions support measurement stability and reduce interference effects caused by installation environments.
Frequently Asked Questions
Q: What type of sensor input does the 991-01-XX-01-00 accept? A: The transmitter accepts one non-contacting 3300 NSv proximity probe with the corresponding extension cable assembly.
Q: What power supply range is required for operation? A: The unit requires +12 to +35 VDC input power applied at the transmitter terminal.
Q: What mounting method is specified for this model configuration? A: This configuration uses 35 mm DIN-rail clips for mechanical installation.
Field Installation Guidelines
Install the transmitter on a suitable DIN rail location with adequate clearance for terminal wiring and maintenance access.
Connect the 3300 NSv proximity probe and extension cable according to the specified signal wiring arrangement. Maintain proper cable routing practices and separate probe wiring from high-voltage power conductors to reduce electrical interference.
Verify the probe gap voltage before commissioning. Confirm the transmitter power supply polarity and voltage range at the terminal connection point.
Ensure cable shielding and grounding follow the applicable plant instrumentation standards. Avoid excessive bending or mechanical stress on the probe extension cable during installation.
