Integrated Vibration Monitoring with Simplified Installation
The 990-04-70-01-CN accepts input from a compatible 3300 NSv proximity probe and matching extension cable, conditions the vibration signal internally, and outputs an industry-standard 4–20 mA signal directly to PLC, DCS, or SCADA systems. In addition to the analog process signal, the transmitter provides a dynamic output for diagnostic testing and vibration analysis, allowing maintenance personnel to verify machine condition without interrupting normal operation.
Its rugged encapsulated electronics provide dependable operation in harsh industrial environments where vibration, humidity, and temperature variations are common.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 990-04-70-01-CN |
| Product Type | 990 Vibration Transmitter |
| Full-Scale Range | 0–4 mils pp (0–100 μm pp) |
| Output Signal | 4–20 mA, Two-Wire Loop Powered |
| Compatible Probe | 3300 NSv Proximity Probe |
| System Length | 7.0 m (23 ft) |
| Mounting Option | 35 mm DIN Rail Clips |
| Agency Approval | CN (Country-Specific Hazardous Area Approval) |
| Frequency Response | 5 Hz to 6 kHz |
| Power Supply | +12 to +35 VDC |
| Operating Temperature | -35°C to +85°C |
| Housing | Industrial Potted Construction |
| Approximate Dimensions | 124 × 126 × 22 mm |
| Approximate Weight | 0.54 kg |
Industrial Applications
The 990-04-70-01-CN is designed for continuous vibration monitoring of critical rotating machinery.
| Industry | Typical Equipment |
|---|
| Oil & Gas | Compressors, process pumps |
| Power Generation | Steam turbines, generators |
| Petrochemical | Rotating process equipment |
| Manufacturing | Electric motors, fans, blowers |
| Water Treatment | Pumping systems |
| OEM Machinery | Packaged compressor and pump skids |
Typical applications include:
-
Shaft vibration monitoring
-
Continuous machinery protection
-
PLC and DCS vibration input
-
Predictive maintenance
-
Equipment health trending
-
Alarm and shutdown systems
Key Advantages
Integrated Proximitor® Electronics
The transmitter combines signal conditioning and vibration conversion within one compact enclosure, eliminating the need for a separate Proximitor® module and reducing wiring complexity.
Standard 4–20 mA Process Output
The transmitter delivers an industry-standard analog signal that integrates easily with virtually any industrial automation or monitoring platform.
Hazardous Area Certification
The CN approval option supports installations that require country-specific hazardous-area compliance, making the transmitter suitable for regulated industrial environments.
Dynamic Diagnostic Output
A dedicated dynamic output allows technicians to access raw vibration and gap voltage signals for commissioning, troubleshooting, and advanced machinery diagnostics.
Compact Industrial Design
The slim DIN rail-mounted construction minimizes control cabinet space while providing long-term reliability in demanding operating conditions.
Technical FAQs
1. What is the Bently Nevada 990-04-70-01-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 "04" option indicate?
It specifies a 0–4 mils peak-to-peak (0–100 μm pp) vibration measurement range.
3. What does the "70" option represent?
It identifies compatibility with a 7-meter proximity transducer system consisting of the probe and extension cable.
4. What does the "01" option specify?
It designates 35 mm DIN rail mounting for straightforward installation inside industrial control panels.
5. What does the "CN" approval option mean?
The CN configuration is intended for country-specific hazardous-area approvals, supporting installations that require applicable regional certifications.
6. Which proximity probe is compatible?
The transmitter is designed for use with a 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 loop-powered supply.
8. Can it connect directly to a PLC or DCS?
Yes. The 4–20 mA output is intended for direct connection to PLC, DCS, SCADA, and other industrial automation systems.
9. Does the transmitter provide a diagnostic output?
Yes. A dynamic vibration output is available for advanced diagnostics and signal verification during maintenance.
10. Which equipment commonly uses this transmitter?
It is commonly installed on centrifugal compressors, pumps, motors, fans, and other rotating machinery that requires continuous vibration monitoring.
A DCS Q Co., Ltd. - PLC and DCS Industrial Control Equipment Wholesale
