Product Overview
Compact Monitoring Solution for Critical Rotating Equipment
The 990-05-50-01-CN receives vibration input from a 3300 NSv proximity probe and matching extension cable, internally conditions the eddy-current signal, and provides a linear 4–20 mA output proportional to shaft vibration. In addition to the process output, the transmitter includes a PROX OUT terminal for accessing the dynamic vibration waveform and gap voltage during commissioning, diagnostics, and predictive maintenance.
Its fully encapsulated electronics are designed to withstand vibration, moisture, and harsh industrial environments while supporting long-term reliable operation.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 990-05-50-01-CN |
| Product Type | 990 Vibration Transmitter |
| Full-Scale Range | 0–5 mils pp (0–125 μm pp) |
| Output Signal | 4–20 mA, Two-Wire Loop Powered |
| Compatible Probe | 3300 NSv Proximity Probe |
| System Length | 5.0 m (16.4 ft) |
| Mounting Option | 35 mm DIN Rail Clips |
| Agency Approval | CN – ATEX/IECEx and Chinese NEPSI Hazardous Area Approval |
| Frequency Response | 5 Hz to 6 kHz |
| Supply Voltage | +12 to +35 VDC |
| Diagnostic Output | PROX OUT Dynamic Signal |
| Operating Temperature | -35°C to +85°C |
| Storage Temperature | -51°C to +100°C |
| Construction | Fully Potted Industrial Electronics |
| Approximate Weight | 0.43 kg |
Typical Applications
The 990-05-50-01-CN is suitable for continuous vibration monitoring in numerous industrial sectors.
| Industry | Typical Equipment |
|---|
| Oil & Gas | Centrifugal compressors, process pumps |
| Power Generation | Steam turbines, generators |
| Petrochemical | Compressors, motors |
| Chemical Processing | Rotating process equipment |
| Water & Wastewater | Pumping systems |
| OEM Machinery | Compressor and pump skids |
Typical monitoring applications include:
-
Shaft vibration monitoring
-
Machinery condition monitoring
-
Predictive maintenance
-
Continuous equipment health monitoring
-
PLC/DCS integration
-
Alarm and shutdown systems
Key Features & Benefits
Integrated Proximitor® Electronics
The transmitter combines signal conditioning and vibration conversion into a single compact device, reducing wiring complexity and installation costs.
0–5 mils Measurement Range
The 05 full-scale option measures vibration from 0 to 5 mils peak-to-peak (0–125 μm pp), making it suitable for machinery requiring a wider vibration measurement span.
Hazardous-Area Certification
The CN option includes ATEX/IECEx and Chinese NEPSI hazardous-area approvals, enabling installation in certified hazardous locations where applicable regulations must be met.
Standard 4–20 mA Output
The loop-powered analog output interfaces directly with PLC, DCS, SCADA, and other industrial automation systems for continuous monitoring and trending.
Built-In Diagnostic Output
The PROX OUT connection provides access to dynamic vibration and gap voltage signals for calibration, troubleshooting, and vibration analysis.
Rugged Industrial Construction
Fully potted electronics provide excellent resistance to moisture, vibration, and contaminants, supporting dependable long-term operation in harsh industrial environments.
Frequently Asked Questions
1. What is the Bently Nevada 990-05-50-01-CN used for?
It converts shaft vibration from a compatible proximity probe into a 4–20 mA signal for machinery monitoring and protection systems.
2. What does the "05" option indicate?
It specifies a 0–5 mils peak-to-peak (0–125 μm pp) vibration measurement range.
3. What does the "50" option represent?
It indicates compatibility with a 5.0-meter transducer system, including the probe and extension cable.
4. What does the "01" mounting option specify?
It designates 35 mm DIN rail clips for convenient installation inside industrial control cabinets.
5. What does the "CN" approval option mean?
The CN option provides ATEX/IECEx and Chinese NEPSI hazardous-area approvals for installations requiring certified equipment.
6. Which proximity probe is compatible?
The transmitter is designed for use with the Bently Nevada 3300 NSv proximity probe and the corresponding extension cable.
7. What power supply is required?
The transmitter operates from a +12 to +35 VDC two-wire loop-powered supply.
8. Can it connect directly to a PLC or DCS?
Yes. Its 4–20 mA output is intended for direct integration with industrial control and monitoring systems.
9. Does it provide a diagnostic output?
Yes. The PROX OUT terminal provides dynamic vibration and gap voltage signals for maintenance diagnostics and waveform analysis.
10. Which machines commonly use this transmitter?
It is commonly installed on centrifugal compressors, pumps, motors, fans, blowers, and similar rotating equipment requiring continuous vibration monitoring.
A DCS Q Co., Ltd. - PLC and DCS Industrial Control Equipment Wholesale
