Manufacturer: Bently Nevada
Product No.: 991-06-50-01-05
Country of origin:United States
Product Type: Vibration Transmitter
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 430g
Dimensions: 100 mm x 74 mm x 53.3 mm
Shipping port: Xiamen
Warranty: 12 months
The Bently Nevada 991-06-50-01-05 is a 2-wire, loop-powered machinery protection instrument designed to measure axial shaft displacement. This 991 Thrust Transmitter interfaces directly with a 3300 NSv proximity probe and its matching 5.0-meter extension cable. It processes proximity sensor signals into a standard 4 to 20 mA DC linear current output proportional to total thrust movement. This continuous monitoring signal integrates directly with standard programmable logic controllers (PLCs), distributed control systems (DCSs), or SCADA hardware without requiring dedicated machinery monitoring rack systems. The transmitter incorporates an internal Proximitor sensor within a single potted housing to withstand demanding industrial plant conditions.
| Electrical Parameters Value | |
| Power Requirements | 2-wire, loop-powered (12 to 35 VDC input) |
| Current Loop Output | 4 to 20 mA DC proportional to thrust position |
| Maximum Loop Load | 1,000 ohms at 35 VDC |
| System Accuracy | Plus or minus 1.5% of Full Scale |
| Fault Response | Less than 3.6 mA in 100 microseconds |
| Performance and Hardware Configuration Value | |
| Full-Scale Range Option (-06) | 0.6-0-0.6 mm (±0.6 mm / 25 mils) total thrust movement |
| Cable System Length (-50) | 5.0 meters (16.4 feet) |
| Mounting Type Option (-01) | 35 mm DIN rail clips |
| Sensor Input Compatibility | 3300 NSv proximity probe and extension cable |
| Environmental and Mechanical Value | |
| Operating Temperature | -35 deg C to +85 deg C |
| Storage Temperature | -51 deg C to +100 deg C |
| Relative Humidity | 0 to 100% RH condensing, non-submerged |
| Vibration Resistance | 50g conforming to IEC 60068-2-6 |
| Shock Survival | 100g at 11 ms |
| Transmitter Weight | 0.43 kg |
Connections / Interfaces
| Terminal / Connector Pin Function | |
| +4-20mA | Positive loop power supply input and current transmission terminal |
| -4-20mA | Negative loop power supply return connection |
| PROX OUT | Coaxial/terminal signal output for unisolated dynamic diagnostics |
| COM | Common circuit reference return for diagnostic instruments |
| TEST IN | Test pin interface for function generator or variable DC verification |
| Coaxial Connector | Miniature female socket matching the 3300 NSv extension cable |
What mechanical movement does the Bently Nevada 991-06-50-01-05 measure?
It measures the axial thrust or displacement of a rotating machinery shaft rather than radial casing vibration.
Does this module require a standalone Proximitor driver unit?
No, it features a built-in Proximitor sensor that processes proximity probe eddy-current fields directly within the transmitter module.
What specific cable length is this transmitter calibrated to support?
The -50 option specifies that the transmitter is calibrated to match a 5.0-meter proximity probe and extension cable system.
What is the full-scale range defined by the -06 option?
The full-scale measurement limits are 0.6-0-0.6 mm, providing an aggregate scale of ±0.6 mm of shaft axial travel.
Can I connect an AC-powered oscilloscope directly to the PROX OUT pin?
Because the dynamic PROX OUT terminal is not isolated from the 4 to 20 mA power loop, using an external signal isolation adapter is highly recommended to protect against signal interference.
What sensor is electrically matched with this thrust transmitter?
It is built exclusively to read signals from a Bently Nevada 3300 NSv proximity probe.
How does the Power-up Inhibit feature protect the control room loops?
It mutes erroneous transient output currents during startup spikes to prevent false alarms or safety trips in the connected DCS or PLC.
What type of mounting method does this unit feature?
The -01 option provides integral 35 mm DIN rail mounting clips for immediate standard rail installation.
Can this unit operate in high-humidity machinery environments?
Yes, it is built with fully potted electronic assemblies and certified up to 100% condensing humidity when coaxial connections are properly protected.
What does the -05 configuration suffix represent?
The -05 code designates a specific multi-certification agency approval package, including ATEX, CSA, and ABS Marine ratings.
Global Express Shipping
Returns & Warranty
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Color pattern |
Greyish White
Black
|
| Country of origin |
United States
|
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