Bently Nevada 1900/65A-00-00-02-00-01 – General Purpose Equipment Monitor for Reliable Vibration Protection

• Dual-channel monitoring – Typically handles two vibration measurements (e.g., radial vibration or casing vibration) on a single machine.

• Multiple sensor compatibility – Works with common Bently Nevada proximity probes (for shaft vibration/thrust) and seismic/velocity sensors for casing vibration.

• Discrete alarm relays – Alarm and trip logic for local shutdown or interlock; you get fast, deterministic protection without relying on the network.

• 4–20 mA outputs – Proportional outputs per channel for simple trending in DCS/PLC systems.

• Buffered transducer outputs – Handy for portable analyzers; technicians can verify signals at the panel during route-based checks.

• DIN-rail mounting – Compact form factor, usually a quick fit inside existing panels with standard 35 mm DIN rails.

• Rugged design – Built for industrial environments; typically used on balance-of-plant where reliability matters more than fancy graphics.

This model is commonly deployed on:

• Pumps and fans in utilities or water treatment where simple trip/alarm is sufficient.

• Blowers, small compressors, and packaged skids where rack-based systems are overkill.

• Gearboxes and motor bearings on conveyors, mills, or mixers—especially where operators want 4–20 mA trending plus hardwired trips.

• Remote or outdoor skids; the DIN-rail layout simplifies enclosure design.

One thing I appreciate is how maintenance teams can plug into the buffered outputs and quickly validate sensor health without dismantling anything. In many cases, that cuts troubleshooting time dramatically.

• Reliability – Proven Bently Nevada signal chain; stable alarm setpoints reduce nuisance trips.

• Compatibility – Works with standard Bently proximity probes and common industrial accelerometers/velocity sensors.

• Cost-effective protection – You get hardware trips and clean 4–20 mA outputs without paying for a full rack and server.

• Ease of integration – Hardwired I/O slots straight into existing DCS/PLC analog inputs and interlocks.

• Support & lifecycle – Broad installed base means spare parts and expertise are easier to secure.

A maintenance supervisor told us their 1900/65A setup “just runs”—they liked the straightforward alarm logic and the fact that operators can see trends in the DCS without learning a new software package.

• Panel & environment – Mount on a 35 mm DIN rail in a clean, dry enclosure. Provide ventilation; avoid high-vibration mounting surfaces.

• Wiring – Use shielded, twisted-pair cabling for sensor inputs. Ground shields at one end only to limit noise. Keep power and signal wiring segregated.

• Power – Stable 24 VDC supply is typical; size the PSU with headroom for startup and relay inrush.

• Alarm tuning – Set Alert/Danger thresholds with proper baselining. From my experience, starting with ISO/industry norms and then tuning to machine behavior works best.

• Routine checks – Quarterly review of 4–20 mA trends; verify relay function with simulated signals; clean terminals and inspect grounds.

• Calibration – Annual verification using a reference signal or comparison to a portable analyzer via buffered outputs seems to be a good practice.

• Firmware/config – If applicable to your revision, document configuration files and back them up after each change.

• Certifications – CE compliant; UL/cUL and RoHS are commonly available for this product family. Hazardous area approvals may depend on sub?model options.

• Warranty – 365 days from shipment.

• Proximity probe systems (e.g., Bently Nevada 3300 XL series) for shaft vibration and thrust position.

• Industrial accelerometers/velocity sensors for casing vibration (Bently Nevada seismic sensors or equivalents).

• DIN-rail power supplies (24 VDC) and terminal blocks for clean panel integration.