Description
Overview
The 1900/65A 167699-02 machinery monitor from Bently Nevada is a compact single-channel vibration protection system developed for continuous condition monitoring of rotating equipment. Combined with the 172323-01 power supply module, the unit delivers standalone machinery protection functions for applications where a full rack-based monitoring system is unnecessary.
The monitor supports multiple transducer technologies including proximity probes, velocity pickups, and accelerometers. It provides real-time vibration measurement, configurable alarm processing, relay-based shutdown capability, and analog signal transmission for integration with plant control systems.
Designed for small and medium rotating assets, the 1900/65A is commonly installed on pumps, blowers, fans, compressors, and auxiliary process machinery requiring dependable vibration supervision.
Key Features
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Single-channel machinery vibration monitoring
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Compatible with displacement, velocity, and acceleration sensors
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Integrated Alert and Danger alarm processing
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Dual Form-C relay outputs for shutdown logic
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Buffered BNC output for portable analyzer connection
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Isolated 4–20 mA output for DCS and PLC systems
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Compact DIN-rail or panel-mounted installation
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Suitable for API-style machinery protection applications
Technical Specifications
| Parameter |
Specification |
| Brand |
Bently Nevada |
| Monitor Model |
1900/65A 167699-02 |
| Power Supply Module |
172323-01 |
| Product Type |
Machinery Vibration Monitor |
| Monitoring Channels |
1 Channel |
| Supported Sensor Types |
Proximity Probes, Velocity Sensors, Accelerometers |
| Measurement Functions |
Overall Vibration, Shaft Displacement, Acceleration |
| Frequency Response |
Typically 3 Hz to 10 kHz |
| Alarm Levels |
Alert and Danger |
| Alarm Accuracy |
±1% of Full Scale |
| Alarm Delay |
Adjustable |
| Alarm Latching |
Selectable |
| Relay Quantity |
2 Relays |
| Relay Type |
Form-C (SPDT) |
| Relay Rating |
5 A @ 250 Vac / 5 A @ 30 Vdc |
| Buffered Output |
Front Panel BNC Connector |
| Analog Output |
Isolated 4–20 mA |
| Power Input Range |
85–264 Vac, 50/60 Hz |
| DC Input Range |
100–300 Vdc |
| Power Consumption |
Less than 10 W |
| Isolation Rating |
1500 Vac |
| Operating Temperature |
-20°C to +65°C |
| Humidity Rating |
95% Non-Condensing |
| Mounting Method |
DIN Rail or Panel Mount |
| Protection Rating |
IP20 |
| Dimensions |
2.2 × 12.4 × 12.6 cm |
| Weight |
0.289 kg |
Monitoring Functions
The 1900/65A continuously processes vibration signals from connected sensors and compares measured values against configured alarm thresholds. When vibration exceeds predefined limits, the monitor activates relay outputs for annunciation or machine shutdown sequences.
The integrated buffered output provides direct access to the raw transducer signal, allowing maintenance personnel to connect portable analyzers for diagnostic evaluation and troubleshooting.
Typical Applications
This monitor is widely used for protection of general-purpose and auxiliary rotating machinery, including:
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Centrifugal pumps
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Industrial fans
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Air blowers
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Small compressors
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Cooling tower drives
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Electric motors
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Gearboxes
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Process skids
System Advantages
Compared with larger rack-based systems, the 1900/65A offers a simplified installation footprint while maintaining critical machinery protection functionality. The unit is particularly suitable for distributed equipment layouts and standalone machine packages requiring reliable vibration shutdown capability.
FAQ
What sensors are supported by the 1900/65A monitor?
The monitor supports proximity probe systems, velocity transducers, and accelerometers depending on the selected configuration.
Can the unit provide shutdown protection?
Yes. The monitor includes independent Alert and Danger relays that can be wired into machine shutdown circuits.
Is the monitor suitable for DCS integration?
Yes. The isolated 4–20 mA output allows direct interface with PLC, DCS, and SCADA systems for vibration trending and monitoring.
