PRODUCT INFORMATION
Product Overview
The Bently Nevada 990-04-70-01-00 is a 990/991 series two-wire loop-powered vibration transmitter. It interfaces directly with one 3300 NSv proximity probe and extension cable across a 7.0-meter system length. The transmitter provides a 4–20 mA DC output proportional to peak-to-peak vibration. Its calibrated full-scale measurement range spans 0 to 4 mil peak-to-peak. Supply voltage spans +12 to +35 VDC with an overall loop accuracy of ±1.5% of full scale.
This transmitter mounts on standard 35 mm DIN rails using integrated mounting clips. The unit provides a buffered proximity output calibrated for dynamic signal instruments. Transducer faults cause loop current to drop below 3.6 mA within 100 microseconds. The internal circuit limits output current to 23 mA typical under fault conditions. Operating temperatures range from -35 to +85 °C in condensing humidity environments.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Architecture | Two-wire loop-powered vibration transmitter |
|---|
| Transducer input | One 3300 NSv proximity probe and extension cable |
|---|
| Full-scale range | 0–4 mil peak-to-peak |
|---|
| System length | 7.0 m |
|---|
| Mounting | 35 mm DIN rail clips |
|---|
| Agency approval option | 00 — approval not required |
|---|
| Output | 4–20 mA DC proportional to peak-to-peak vibration |
|---|
| Supply voltage | +12 to +35 VDC |
|---|
| Loop accuracy | ±1.5% of full scale |
|---|
| Maximum loop resistance | 1000 ohm at 35 VDC |
|---|
| Current limit | 23 mA typical |
|---|
| Required probe gap | 0.5–1.75 mm |
|---|
| Not-OK behavior | Below 3.6 mA within 100 µs; restores in 2–3 s |
|---|
| Prox output impedance | 10 kohm, calibrated for a 10 Mohm load |
|---|
| Prox linear range | 1.4 mm beginning approximately 0.25 mm from target |
|---|
| Prox scale factor | 7.87 mV/µm (200 mV/mil) ±6.5% typical |
|---|
| Frequency response | 5–6000 Hz, +0/-3 dB |
|---|
| Operating temperature | -35 to +85 °C |
|---|
| Storage temperature | -52 to +100 °C |
|---|
| Humidity | 100% condensing, non-submerged, with connector protection |
|---|
| Transmitter weight | 0.43 kg; 0.82 kg typical total system |
|---|
TECHNICAL INFORMATION
Features
- Two-wire loop-powered architecture operates on +12 to +35 VDC supply voltage.
- Provides a 4–20 mA output proportional to 0–4 mil peak-to-peak vibration.
- Compatible with a 7.0 m 3300 NSv proximity probe and extension cable system.
- Integrated 35 mm DIN rail clips support standard industrial cabinet mounting.
- Fast Not-OK detection forces loop output current below 3.6 mA within 100 µs.
- Buffered proximity output with 10 kohm impedance provides dynamic raw signals.
TECHNICAL INFORMATION
Connections / Interfaces
- Transducer terminal connects one 3300 NSv proximity probe and extension cable.
- Two-wire 4–20 mA loop interface supports up to 1000 ohms loop resistance.
- Buffered proximity output terminal delivers raw vibration signals for diagnostic analysis.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the transmitter directly onto standard 35 mm DIN rail clips.
- Set the 3300 NSv proximity probe gap between 0.5 mm and 1.75 mm.
- Protect all transducer connectors to withstand condensing humidity environments.
- Ensure supply voltage stays between +12 and +35 VDC across all loop loads.
TECHNICAL INFORMATION
Compatibility
- Bently Nevada 3300 NSv proximity probe and extension cable with 7.0 m system length.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSBently Nevada 3300 NSv proximity probe and extension cable with 7.0 m system length.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the full-scale vibration range of the 990-04-70-01-00?
The 990-04-70-01-00 transmitter provides a calibrated full-scale vibration range of 0 to 4 mil peak-to-peak.
Which transducer system works with this model?
This module operates with a Bently Nevada 3300 NSv proximity probe and extension cable configured for 7.0 meters.
How does the transmitter signal a sensor fault?
The transmitter reduces current below 3.6 mA within 100 microseconds during a Not-OK transducer condition.
What mounting method is required for installation?
The module mounts onto standard 35 mm DIN rails using integrated mounting clips.
