Product Overview

The Bently Nevada 1900/65A, identified by part numbers 172323-01 and 167699-02, is a versatile, standalone machinery protection system designed for "General Purpose" industrial assets. Unlike rack-based systems, the 1900/65A provides a self-contained solution for monitoring critical parameters on motors, pumps, fans, and small turbines. It excels at bridging the gap between basic transmitter-based monitoring and complex large-scale protection systems by offering multi-channel input processing with high-resolution digital conversion.

Equipped with a high-performance 24-bit Analog-to-Digital Converter (ADC), the module ensures superior signal clarity and precision. It is engineered to monitor both dynamic vibration data and static process variables simultaneously, providing a holistic view of machine health. With its integrated event logging and programmable relay logic, the 1900/65A allows for autonomous protective actions, ensuring equipment is safely shut down or alarmed before catastrophic failure occurs.

Advanced Signal Processing and I/O Capability

The architecture of the 1900/65A is highly flexible, supporting a wide array of transducer types through eight dedicated input channels. The system is split into four dynamic inputs (vibration, position, or speed) and four static inputs (temperature), allowing for comprehensive thermal and mechanical tracking. Users can customize scale factors and full-scale ranges to match specific application requirements, while internal "OK" checking logic continuously validates the integrity of the connected sensors and wiring.

For integration with plant-wide control systems, the monitor provides four configurable 4-20 mA outputs, perfect for sending trend data to a PLC or DCS. Additionally, each transducer channel includes a buffered output for connection to portable diagnostic instruments or external analyzers. The protection logic is managed through six programmable relays, each supporting independent Alert and Danger setpoints, providing robust mechanical interlocking for hazardous operational states.

Technical Specifications

• Manufacturer: Bently Nevada

• Model Number: 1900/65A

• Base Part Number: 172323-01

• I/O Board Part Number: 167699-02

• ADC Resolution: 24-bit high-precision conversion

• Dynamic Inputs: 4 Channels (Vibration, Acceleration, Velocity, Position, or Speed)

• Static Inputs: 4 Channels (Temperature via RTD or Thermocouple)

• Relay Outputs: 6 Programmable dry contact relays

• Analog Outputs: 4 Configurable 4-20 mA recorder outputs

• Data Logging: 200-entry internal event list

• Diagnostics: Buffered transducer outputs for every channel

• Monitoring Features: Independent Alert/Danger setpoints and internal self-test (OK status)

• Dimentions: 19.6x16x8cm
  

• Weight: 1.5kg

Industrial Protection Applications

• Fluid Handling: Protecting centrifugal and reciprocating pumps from cavitation or bearing wear.

• Air Management: Monitoring industrial fans and blowers for unbalance or misalignment.

• Small Steam Turbines: Providing essential overspeed and vibration protection for non-API critical units.

• Electric Motors: Tracking thermal performance and vibration signatures for large induction motors.