Bently Nevada 1900/65A-00-00-01-00-00 Vibration Monitor

Overview

The 1900/65A-00-00-01-00-00 is a compact general-purpose equipment monitor from Bently Nevada, intended for continuous vibration supervision of small to medium rotating assets. It combines measurement, alarm handling, and communication functions in a single unit, providing a practical alternative to rack-based systems for less complex machinery.

System Architecture

• Two independent vibration measurement channels

• One Keyphasor® input for speed or phase reference

• Integrated display (attached, no external cable required)

• Embedded signal processing and alarm logic

Technical Specifications

Electrical and Inputs

• Model: 1900/65A-00-00-01-00-00

• Power Supply: 18–36 VDC

• Sensor Compatibility:

• Proximity probes (eddy current type)

• Velocity transducers

• Number of Channels:

• 2 vibration inputs

• 1 Keyphasor® input

Outputs and Communication

• Analog Outputs: 4–20 mA per channel

• Relay Outputs: Configurable alarm and trip relays

• Communication Interface: RS485 (Modbus RTU)

• Local Display: Integrated front-mounted display

Environmental Conditions

• Operating Temperature: -35°C to +65°C

• Protection Class: IP20

• Humidity: Suitable for industrial indoor environments (non-condensing)

Mechanical Data

• Dimensions (L × W × H): 196.9 × 149.4 × 74.4 mm

• Mounting Options: DIN rail or panel mounting

• Weight: 0.77 kg

• Country of Origin: USA (COO available upon request)

Configuration Options (as supplied)

• Power Option: 00 (18–36 VDC)

• Display Option: 01 (integrated display)

• Mounting Option: 00 (standard)

• Approvals: 00 (no additional certifications specified)

• Communication Option: 00 (standard Modbus RS485)

Functional Capabilities

• Continuous real-time vibration monitoring and trending

• Local visualization of machine condition via onboard display

• Alarm and trip logic for direct integration with shutdown systems

• Data transmission to PLC or DCS through Modbus RTU

Key Features

• Compact All-in-One Design
  Eliminates the need for large rack systems in simple monitoring applications

• Dual-Channel Monitoring
  Supports essential vibration measurements for typical rotating equipment

• Integrated Protection Logic
  Provides relay-based alarms and trips for immediate response to abnormal conditions

• Flexible Sensor Support
  Compatible with both proximity and velocity sensing technologies

• Cost-Efficient Deployment
  Suitable for distributed monitoring points where full systems are not justified

Typical Applications

• Electric motors and centrifugal pumps

• Industrial fans and blowers

• Small compressors and auxiliary machinery

• Balance-of-plant equipment in power generation facilities

Engineering Considerations

• Limited to two vibration channels; not intended for complex multi-bearing systems

• Proper sensor selection and configuration are critical for measurement accuracy

• Communication setup (Modbus addressing and scaling) must align with control system requirements

FAQ

Q: Can this unit replace a 3500 rack system?
A: It is designed for simpler applications. For complex machinery requiring multiple channels and advanced diagnostics, a 3500 system is more appropriate.

Q: Does it support remote monitoring?
A: Yes, via Modbus RS485 communication to PLC, DCS, or SCADA systems.

Q: What types of faults can it detect?
A: It can identify common vibration-related issues such as imbalance, misalignment, looseness, and bearing degradation.

Q: Is the display optional?
A: This specific configuration includes an integrated display for local monitoring without additional accessories.