Excellent PLC
Product Introduction
The Bently Nevada 990-04-50-01-CN 990 Vibration Transmitter is designed to provide continuous monitoring of vibration levels in industrial rotating machinery. It transforms dynamic vibration signals from proximity probes, accelerometers, or velocity sensors into a proportional 4-20 mA output that can be easily integrated with PLCs, DCS, or other plant monitoring systems.
This transmitter offers an efficient and reliable way to detect mechanical issues such as imbalance, misalignment, bearing wear, and looseness. By providing early detection of abnormal conditions, it helps to reduce unplanned downtime, minimize maintenance costs, and extend equipment lifespan.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | 990-04-50-01-CN |
| Type | Vibration Transmitter |
| Output Signal | 4–20 mA proportional to vibration |
| Input Type | Compatible with proximity probes, accelerometers, velocity sensors |
| Frequency Range | 10 Hz – 1 kHz |
| Power Supply | 24 VDC nominal |
| Dimensions | 100.1 x 73.9 x 53.3 mm |
| Weight | 0.43 kg |
| Mounting | DIN rail or panel mounting |
| Operating Temperature | -20°C to +65°C |
| Protection Class | IP65 housing |
Product Applications
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Pumps – Monitoring imbalance, cavitation, and bearing condition.
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Fans and Blowers – Detecting misalignment and looseness.
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Compressors – Providing early detection of mechanical wear.
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Motors and Generators – Ensuring reliability and avoiding costly shutdowns.
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Gearboxes and Turbines – Identifying vibration anomalies before failure.
Product Advantages
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Simple Integration – Provides a standard 4-20 mA output, easily connected to PLCs, DCS, or SCADA systems.
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Reliable Monitoring – Continuous vibration surveillance ensures early detection of machine faults.
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Compact Design – Small footprint allows installation in space-constrained environments.
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Versatile Input – Compatible with a wide range of vibration sensors.
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Durable Construction – Designed with IP65 protection for harsh industrial conditions.
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Cost-Effective Solution – Reduces unplanned downtime and improves overall plant efficiency.
FAQ
Q1: What type of sensors can the 990 transmitter accept?
A1: It is compatible with proximity probes, accelerometers, and velocity sensors depending on system requirements.
Q2: What is the typical output of the transmitter?
A2: The device provides a standard 4–20 mA output signal proportional to measured vibration.
Q3: How does the transmitter handle frequency response?
A3: It operates effectively within a frequency range of 10 Hz to 1 kHz, suitable for most rotating machinery.
Q4: Can the transmitter be connected directly to a DCS or PLC?
A4: Yes, the 4–20 mA output allows direct connection to DCS, PLC, or SCADA systems without additional modules.
Q5: Does it support alarm or trip functions?
A5: The transmitter itself provides the signal output; alarm or trip functions are configured within the receiving system.
Q6: Is the transmitter designed for hazardous environments?
A6: Certain versions are certified for hazardous locations, but installation should comply with local safety standards.
Q7: How is the unit mounted?
A7: It can be mounted on DIN rails or directly on panels, offering flexibility during installation.
Q8: Can it be used for slow-speed machinery?
A8: Yes, provided the vibration frequency falls within the supported 10 Hz–1 kHz range.
Q9: What power supply does the transmitter require?
A9: The unit typically operates on a 24 VDC power supply.
Q10: How is sensor calibration managed with this transmitter?
A10: Sensor calibration is performed before connection; the transmitter scales the input signal to match the 4–20 mA output.
Related Models
| Model Number | Description |
|---|---|
| 990-04-50-02 | Vibration Transmitter, alternate range |
| 990-04-50-03 | Vibration Transmitter, wide frequency |
| 990-05-70-01 | Advanced Vibration Transmitter |
| 990-08-30-01 | Dual-channel Vibration Transmitter |
| 990-11-10-01 | High-sensitivity Vibration Transmitter |
| 990-12-20-01 | Transmitter for hazardous environments |
Popular Bently Nevada Models
| Model Number | Description |
|---|---|
| 330103-00-05-05-02-00 | Proximity Probe, standard extension |
| 330104-00-10-10-02-05 | Extension Cable for proximity systems |
| 330130-040-00-00 | Extension Cable, 40 ft length |
| 3500/22M | Transient Data Interface Module |
| 3500/42M | Vibration Monitor Module |
| 3500/92 | Communication Gateway |
| 3500/93 | System Display |
| 3500/15 | Power Supply Module |
