Excellent PLC
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Description
The Bently Nevada 990-04-70-02-00 Vibration Transmitter is designed for OEMs of centrifugal compressors, small pumps, motors, and fans. It provides a simple 4–20 mA output signal proportional to vibration amplitude, enabling integration into machinery control systems. It is a loop-powered, two-wire device compatible with the 3300 NSv proximity probe.
Features
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Integrated Proximitor® Sensor—no external unit required
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Non-isolated dynamic signal output for diagnostics
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Built-in NOT OK signal suppression
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DIN-rail or bulkhead mounting options
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Rugged, potted construction for high-humidity environments
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Test input pin for output verification
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Loop accuracy within ±1.5%
Technical Specifications
| Parameter | Value |
|---|---|
| Input | 3300 NSv Proximity Probe |
| Power Supply | +12 to +35 VDC |
| Output | 4–20 mA DC, loop-powered |
| Frequency Response | 5 Hz to 6,000 Hz |
| Probe Gap Range | 0.5–1.75 mm |
| Max Loop Resistance | 1000 Ω @ 35 VDC |
| Accuracy | ±1.5% of full-scale |
| NOT OK Response | < 3.6 mA within 100 µs |
| Temperature Range (Op.) | -35°C to +85°C |
| Humidity | 100% condensing (non-submerged) |
| Dimensions | 100.1 x 73.9 x 53.3 mm |
| Weight | 0.43 kg |
| Certifications | CSA Div 2, ATEX Zone 0/2, RoHS, FCC, ABS, EN 61000-6-2/6-4 |
Applications
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Centrifugal air compressors
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Small electric motors and pumps
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Industrial fans
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Machinery requiring basic vibration trending
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OEM systems using 4–20 mA vibration signal for control logic
Advantages
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Compact and integrated design
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Simplified installation with DIN/bulkhead options
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Ideal for environments with space or humidity constraints
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Enhances machinery protection without full monitoring systems
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Direct integration into PLC/DCS with industry-standard signal
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Field diagnostic support via dynamic “Prox Out” output
FAQs
Q1: What sensor is compatible with the 990 transmitter?
A1: It is designed for use with the 3300 NSv proximity probe and extension cable.
Q2: What is the power requirement for the unit?
A2: The unit operates from a 12–35 VDC power supply.
Q3: Can it be used in hazardous areas?
A3: Yes, it is certified for CSA Div 2 and ATEX Zone 0 and Zone 2.
Q4: What is the output signal type?
A4: A standard 4–20 mA loop-powered signal proportional to peak-to-peak vibration.
Q5: Is the output signal isolated?
A5: No, the dynamic output (“Prox Out”) is non-isolated; use a 122115-01 adapter for isolation.
Q6: How accurate is the transmitter?
A6: It maintains ±1.5% loop accuracy over the full-scale range.
Q7: What is the installation method?
A7: It supports DIN rail clips or bulkhead screw mounting.
Q8: What happens during a probe fault?
A8: The signal output drops below 3.6 mA, triggering a NOT OK condition.
Q9: Is there a diagnostic feature?
A9: Yes, “Prox Out” provides a diagnostic signal for test equipment.
Q10: Can it be used with grounded test instruments?
A10: Only with the 990/991 Test Adapter to isolate the “Prox Out” signal.
Related Models
| Model | Full-Scale Range | Cable Length | Mounting Type | Weight |
|---|---|---|---|---|
| 990-04-50-02-00 | 0–100 μm (pp) | 5.0 m | Bulkhead Mount | 0.43 kg |
| 990-05-70-02-00 | 0–125 μm (pp) | 7.0 m | Bulkhead Mount | 0.43 kg |
| 990-08-70-02-00 | 0–200 μm (pp) | 7.0 m | Bulkhead Mount | 0.43 kg |
| 990-10-50-01-00 | 0–250 μm (pp) | 5.0 m | DIN Rail Clip | 0.43 kg |
| 990-04-70-01-00 | 0–100 μm (pp) | 7.0 m | DIN Rail Clip | 0.43 kg |
| 990-10-70-03-00 | 0–250 μm (pp) | 7.0 m | DIN + Bulkhead | 0.43 kg |
Popular Bently Nevada Models
| Model | Description | Output Signal | Mounting | Dimensions (mm) | Weight |
|---|---|---|---|---|---|
| 3500/42M | Proximitor Seismic Monitor Module | Dynamic | Rack | 241 x 24 x 229 | 0.56 kg |
| 3500/22M | Transient Data Interface Module | Buffered | Rack | 241 x 24 x 229 | 0.48 kg |
| 3500/20 | Rack Interface Module | Buffered | Rack | 241 x 24 x 229 | 0.50 kg |
| 330180-91-CN | 3300 XL Proximitor Sensor | Dynamic | Threaded | 100.1 x 73.9 x 53.3 | 0.43 kg |
| 330104-00-10-10-02-00 | 3300 XL 8 mm Proximity Probe | Dynamic | Threaded | Varies by config | 0.28 kg |
| 3500/15 | Power Supply Module | N/A | Rack | 241 x 24 x 229 | 0.60 kg |
