Product Overview
The Bently Nevada 990-16-XX-01-CN (106M1675-01) is a 2-wire, loop-powered vibration transmitter from the 990 Series, engineered for continuous monitoring of rotating machinery where a simple, proportional vibration signal is required as input to a control system. The Bently Nevada 990-16-XX-01-CN accepts input from a single Bently Nevada 3300 NSv (Narrow Side View) proximity probe and its matching extension cable, conditioning the signal into a 4-20 mA output proportional to peak-to-peak vibration amplitude . This makes the Bently Nevada 990-16-XX-01-CN an ideal solution for OEM applications involving centrifugal air compressors, small pumps, motors, and fans, where machinery protection alarming and logic functions are performed by the equipment control system rather than a dedicated vibration monitor .
The Bently Nevada 990-16-XX-01-CN is distinguished by its integrated Proximitor sensor, which eliminates the need for an external proximity transducer driver and simplifies installation in space-constrained locations . The transmitter’s potted construction provides protection in high-humidity environments up to 100% condensing, while the compact housing allows mounting in areas where larger monitoring equipment cannot fit . The 990-16-XX-01-CN variant includes 35 mm DIN rail clips for mounting and carries CSA Division 2 and ATEX Zone 0/Zone 2 agency approvals, making it suitable for use in hazardous areas where flammable atmospheres may be present .
As a loop-powered device requiring +12 to +35 VDC input at the transmitter terminals, the Bently Nevada 990-16-XX-01-CN minimizes wiring complexity by sharing power and signal over the same two conductors . The transmitter’s Not OK/Signal Defeat circuit drives the output below 3.6 mA within 100 microseconds when a faulty probe or loose connection is detected, preventing false high readings that could trigger spurious alarms or mask actual machinery problems .
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 990-16-XX-01-CN (MOD: 106M1675-01) |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Type | 2-Wire Vibration Transmitter |
| Product Series | 990 Series |
| Input Compatibility | 3300 NSv Proximity Probe and Extension Cable |
| Power Requirement | +12 to +35 VDC (loop-powered) |
| Output Signal | 4-20 mA, 2-wire configuration |
| Loop Accuracy | Within ±1.5% over specified full-scale range |
| Frequency Response | 5 Hz to 6,000 Hz (+0, -3 dB) |
| Maximum Loop Resistance | 1,000 Ω including cable at 35 VDC |
| Current Limiting | 23 mA typical |
| Probe Gap Range | 0.5 to 1.75 mm (20 to 55 mils) |
| Operating Temperature | -35°C to +85°C (-31°F to +185°F) |
| Storage Temperature | -52°C to +100°C (-62°F to +212°F) |
| Humidity Tolerance | 0% to 100% condensing (potted construction) |
| Mounting Option | 35 mm DIN rail clips |
| Agency Approvals | CSA Division 2, ATEX Zone 0/Zone 2, ABS maritime |
| Weight | Approximately 0.46 kg |
| Country of Origin | USA |