Product Introduction
When unexpected machinery vibration threatens uptime, the Bently Nevada 990-05-50-03-CN Vibration Transmitter delivers precise monitoring and rapid fault response. This industrial automation module accepts one non-contacting 3300 NSv Proximity Probe and extension cable to convert shaft vibration into a 4-20 mA signal. Designed for critical rotating equipment, the 990-05-50-03-CN ensures continuous condition monitoring in harsh environments.
Technical Specifications
| Parameter |
Value |
| Full-Scale Range |
0 to 5 mils peak-to-peak (0 to 125 μm peak-to-peak) |
| System Length Option |
5.0 meters (16.4 feet) |
| Mounting Option |
03 DIN clips and screws |
| Input |
One non-contacting 3300 NSv Proximity Probe and extension cable |
| Power Requirement |
+12 to +35 Vdc at transmitter terminal |
| Signal Output |
4 to 20 mAdc over specified full-scale (2-wire) |
| Loop Accuracy |
Within ±1.5% over full-scale (at 250 Ω load) |
| Maximum Loop Resistance |
1,000 Ω including cable at 35 Vdc |
| Current Limiting |
23 mA typical |
| Probe Gap |
0.5 to 1.75 mm (20 to 55 mils) |
| Frequency Response |
5 Hz to 6,000 Hz +0, -3 dB |
| Minimum Target Size |
9.5 mm (0.375 in) diameter |
| NOT OK/Signal Defeat |
Output <3.6 mA within 100 μs; restores in 2–3 s |
| Zero and Span |
Non-interacting external adjustments |
| Weight |
0.43 kg (0.9 lbm) |
| Agency Approval |
CN – country specific |
The Bently Nevada 990-05-50-03-CN operates with +12 to +35 Vdc input and delivers a linear 4-20 mA signal proportional to vibration amplitude. Its frequency response from 5 Hz to 6,000 Hz covers common machine faults including imbalance, misalignment, and bearing wear.
Installation & Setup Guidance
Mount the 990-05-50-03-CN using DIN clips and screws (option 03). Ensure the proximity probe is properly gapped between 0.5 and 1.75 mm (20–55 mils) from the target to achieve full-scale range. The maximum leadwire length from the Proximitor Sensor output (BNC connector) is 3 meters (10 feet). Power must be applied at the transmitter terminal within +12 to +35 Vdc; observe polarity per the wiring diagram. External zero and span adjustments are non-interacting, allowing easy calibration without cross-talk.
Maintenance & Reliability
The Bently Nevada 990-05-50-03-CN enhances system reliability through its built-in signal defeat function. If a sensor fault or power loss occurs, the output drops below 3.6 mA within 100 μs, alerting control systems immediately. The output restores automatically within 2–3 seconds after the fault clears. With a typical current limit of 23 mA, the module protects downstream equipment from overcurrent. Its robust design supports continuous operation in non-hazardous, Zone 2, and Division 2 hazardous area locations when powered with a 28 V supply.
Selection Guide & Purchasing Advice
When selecting the Bently Nevada 990-05-50-03-CN, verify the full-scale option (05 = 0–5 mils pp) and system length (5 = 5.0 meters). The CN agency approval indicates country-specific compliance. For additional configurations or to confirm compatibility with existing systems, contact PLC Source PRO (visit ubest101.myshopify.com). PLC Source PRO stocks genuine Bently Nevada modules and can advise on probe types, extension cables, and mounting accessories to ensure a seamless integration.