Bently Nevada 991-06-50-01-CN Thrust Transmitter
Bently Nevada 991-06-50-01-CN Thrust Transmitter
The Bently Nevada 991-06-50-01-CN is a two-wire thrust transmitter designed for continuous axial position monitoring of rotating machinery. It accepts input from a 3300 NSv proximity probe system and converts shaft thrust position into a standard 4-20 mA output signal for integration with PLC, DCS, and machine monitoring systems. This configuration provides a 0.6 - 0 - 0.6 mm measurement range and a 5.0 m transducer system length.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 991-06-50-01-CN |
| Brand | Bently Nevada |
| Product Type | Thrust Transmitter |
| Full Scale Range | 0.6 - 0 - 0.6 mm |
| System Length | 5.0 m (16.4 ft) |
| Input Signal | 3300 NSv proximity probe and extension cable |
| Compatible System Lengths | 5 m and 7 m extension cable systems |
| Output Signal | 4-20 mAdc current loop |
| Power Supply | 12-35 VDC |
| Mounting Method | DIN rail or bulkhead mounting |
| Operating Temperature | -35 deg C to +85 deg C |
| Diagnostic Output | Non-isolated PROX OUT/COM |
| Regional Version | CN configuration |
Axial Position Monitoring
The transmitter is designed to monitor shaft axial movement relative to a fixed machine reference. Axial position measurement is commonly used on rotating equipment where thrust bearing performance and shaft movement must be continuously observed.
The configured range of 0.6 - 0 - 0.6 mm allows positive and negative shaft movement around a defined reference position. The corresponding 4-20 mA output enables direct connection to plant control and monitoring systems for indication, trending, or alarm functions.
Probe System Compatibility
The 991 transmitter accepts input from a Bently Nevada 3300 NSv proximity transducer system. This configuration uses a 5.0 m system length and is compatible with installations utilizing either 5 m or 7 m extension cable systems as specified in the provided documentation.
Because shaft position accuracy depends on the complete transducer system, replacement components should be selected according to the required system length and compatible probe configuration.
Integrated Signal Conditioning
The transmitter incorporates proximity transducer signal conditioning electronics within the same housing, eliminating the need for a separate external signal conditioning module. A non-isolated PROX OUT/COM connection is provided for diagnostic access and signal verification during commissioning and maintenance.
Independent Zero and Span adjustments are provided, allowing calibration of the output range without interaction between the two settings. This simplifies setup and field adjustment procedures.
Environmental and Installation Features
The transmitter employs a potted internal construction that helps protect the electronics from moisture and contamination. The design supports installation in high-humidity environments, including locations where 100% condensing conditions may occur.
DIN rail and bulkhead mounting options allow installation within machinery monitoring panels, control cabinets, or equipment enclosures depending on site requirements.
Frequently Asked Questions
Q: What does the 06 range option represent?
A: The 06 option specifies a thrust position measurement range of 0.6 - 0 - 0.6 mm, allowing monitoring of axial shaft movement on both sides of the reference position.
Q: Which probe system can be used with the 991-06-50-01-CN?
A: This transmitter is designed for use with a Bently Nevada 3300 NSv proximity probe system and a configured 5.0 m transducer system length.
Q: Is a separate signal conditioner required?
A: No. The transmitter includes integrated proximity transducer signal conditioning electronics and provides a 4-20 mA output directly from the two-wire transmitter assembly.
Bently Nevada 991-06-50-01-CN Thrust Transmitter
