Product Introduction
When thrust bearing misalignment threatens machine uptime, the Bently Nevada 991-06-50-03-05 Probe Vibration Transmitter provides precise axial position monitoring. This DIN rail-mounted transmitter converts proximity probe signals into a 4-20 mA output for seamless integration with control systems. Designed for continuous duty, it monitors thrust position with a linear range of 0.25 to 1.65 mm and offers configurable full-scale options including 0.6-0-0.6 mm.
Technical Specifications Breakdown
The Bently Nevada 991-06-50-03-05 operates on a +12 to +35 Vdc supply and delivers a 4-20 mA signal with ±1.5% accuracy over the full-scale range. Key parameters include:
| Parameter |
Value |
| Power Supply |
+12 to +35 Vdc |
| Output Signal |
4-20 mA (2-wire) |
| Accuracy |
±1.5% typical at 250 Ω load |
| Maximum Loop Resistance |
1,000 Ω at 35 Vdc |
| Current Limit |
23 mA typical |
| Operating Temperature |
-35°C to +85°C |
| Weight |
0.43 kg (0.9 lb) |
The Not OK/Signal Defeat function forces output below 3.6 mA within 100 µs upon fault detection, enabling rapid shutdown response.
Installation & Setup Guidance
Mount the Bently Nevada 991-06-50-03-05 on a DIN rail using the included DIN clips and screws (Mounting Option 03). Connect a compatible 3300 NSv proximity probe and extension cable to the transmitter input. Adjust zero and span via non-interacting external potentiometers. Ensure supply voltage remains between +12 and +35 Vdc at the transmitter terminals. For optimal performance, keep loop resistance below 1,000 Ω including cable.
Maintenance & Reliability
Routine checks should verify the transmitter’s environmental limits: store between -51°C and +100°C. Inspect cable connections and probe tip clearance periodically. The Bently Nevada 991-06-50-03-05 features automatic current limiting to protect against overcurrent events. With no moving parts and solid-state circuitry, this transmitter offers extended service life in harsh industrial environments.
Troubleshooting & Common Issues
If output remains high or stuck, verify power supply voltage at the terminal. A continuous low output (near 3.6 mA) indicates a Not OK condition – check probe integrity and cable continuity. For inaccurate readings, confirm the linear range setting matches the probe gap. The Bently Nevada 991-06-50-03-05 recovers within 0.1 seconds after a fault clears, minimizing downtime.
Selection Guide
Before ordering, confirm the full-scale option (e.g., 06 for 0.6-0-0.6 mm), system length (e.g., -50 for 5.0 m cable), and agency approvals required (Option 05 includes CSA, ATEX Zone 0/2, and ABS maritime). For assistance in selecting the correct configuration, contact PLC Source PRO at ubest101.myshopify.com for expert guidance.