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Product Description

High-Integrity Machinery Protection in a Compact Format

The Bently Nevada 1900/65A is a versatile and self-contained machinery protection system designed for continuous monitoring and protection of critical industrial assets. This specific kit comprises the monitor unit 167699-02 and its associated components 172323-01. Unlike large-scale rack systems, the 1900/65A provides essential protection for small to mid-sized machinery—such as cooling tower fans, pumps, and small compressors—where a full 3500 series rack may not be cost-effective. It effectively monitors vibration, position, and speed, ensuring equipment safety through immediate alarm and trip functionality.

Flexible Interface and Seamless Integration

The 1900/65A is engineered to bridge the gap between field sensors and plant-wide control systems. It accepts a variety of inputs, including proximity probes, accelerometers, and velocity sensors. For data integration, the module provides 4–20 mA proportional outputs for direct connection to a DCS or PLC, alongside Modbus RS-485 communication for digital integration. The module features configurable onboard relays, allowing for independent machinery shutdown logic that operates reliably even if the supervisory control system is offline.

Detailed Technical Specifications

Feature Specification Details
Manufacturer Bently Nevada (Baker Hughes)
Model Number 1900/65A
Component P/Ns 167699-02 (Unit) & 172323-01 (Components)
Input Channels 4 Monitor Channels + 1 Tachometer Channel
Transducer Types Proximity Probes, Accelerometers, Velocity Sensors
Monitoring Types Radial Vibration, Axial Position, Shaft Speed, Temperature
Output Signals Multiple 4–20 mA Proportional Outputs
Digital Comms Modbus RS-485 (via terminal block)
Relay Config Configurable Alarm and Trip Relays
Power Supply 18 to 36 Vdc (24 Vdc nominal)
Operating Temp –35 °C to +65 °C (–31 °F to +149 °F)
Mounting DIN-rail or Panel Mount
Physical Size 2.2 cm x 12.4 cm x 12.6 cm
Weight 0.289 kg (Net)

 

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