Bently Nevada 1900/65A-01-01-03-00-01 Monitor

Bently Nevada c

1900/65A is a general-purpose equipment monitor from Bently Nevada (Baker Hughes), used for vibration, temperature, speed/position monitoring and protection of non-critical rotating machinery (pumps, fans, motors, compressors, etc.). It is more economical, independent and easy to deploy compared to the 3500 series.

-01-01-03-00-01 is the complete model code, defining the hardware and software configuration.

I. Model Code Interpretation (1900/65A-01-01-03-00-01)

Bit meanings (standard format: 1900/65A-X1-X2-X3-X4-X5):

X1 = 01: Power option → 18–36 VDC (standard)

X2 = 01: Communication interface → RS-485 (Modbus RTU)

X3 = 03: Input configuration → 4× vibration / displacement / speed + 4× temperature (K/J/E/T thermocouple / RTD)

X4 = 00: No additional function options

X5 = 01: Standard firmware version

Core Hardware Specifications

1. Input Channels (Total 8)

4 Dynamic Inputs (Vibration / Displacement / Velocity)

Supported: Eddy Current Probes, 2/3-Wire Accelerometers, Velocity Sensors

24-bit ADC, Bandwidth 25kHz, Accuracy ±0.05% FS

4 Temperature Inputs

Supported: K/J/E/T Thermocouples, 2/3-Wire RTD (Platinum Resistance)

2. Output

6 Relay Outputs (SPDT)

Capacity: 250VAC/3A, 30VDC/3A

Programmable: Alert (Warning), Danger (Danger), OK, Supports Voting Logic

4 4–20mA Analog Outputs: Can Map Any Channel Parameters to DCS/PLC

1 Buffer Output: Original Sensor Signal, For Portable Diagnostic Instrument Access

3. Electrical and Environmental

Power Supply: 18–36 VDC, Typical 0.35A/8.5W, Maximum 1A/14W

Operating Temperature: -40℃ ~ +70℃ (Storage – 40℃ ~ +85℃)

Size (Monitor): 196.9×149.4×74.4mm; With Display: 241×149.4×74.4mm

Weight: Approximately 0.77kg

Installation: DIN Rail or Panel Installation

4. Display and Operation

LCD Backlight Display: Real-time Data, Status, Alarm

LED Indicators: OK, Alert, Danger, Bypass, Trip Multiply, Channel

Buttons: Configuration, Reset, Manual Operation

Main Functions

Multi-parameter Monitoring: Vibration (Peak Peak / RMS / Peak), Shaft Displacement, Speed, Temperature, Temperature Difference, etc.

Two-Level Alarm: Alert (Warning), Danger (Danger), Independent Thresholds and Delay

Relay Logic: 6 Relay Outputs Programmable, Supports “AND/OR” Voting, Self-Locking, Trip Multiplication (Trip Multiply)

Communication: RS-485 Modbus RTU, Can Connect to Host Computer / System 1 Platform

Diagnosis: Sensor Break, Short Circuit, Power Abnormality, Communication Failure Self-Diagnosis

Configuration: Through 1900 Configuration Software or Local Buttons to Complete Parameter Settings

Typical application

Power Plant: Feedwater Pump, Circulation Pump, Draw Fan, Supply Fan, Coal Mill

Petrochemical: Process Pump, Air-cooled Fan, Small Compressor

Metallurgy: Motor, Fan, Roller Conveyor

Water Treatment / HVAC: Pump, Cooling Tower Fan, Air Conditioning Fan

Differences from 3500 Series

Positioning: 1900/65A → Auxiliary Equipment / General Equipment; 3500 → Key Units (Steam Turbine, Compressor)

Architecture: 1900/65A → Independent; 3500 → Rack-mounted, Multi-module Redundancy

Cost: 1900/65A is approximately 1/3 – 1/2 of 3500

Redundancy: 1900 has no redundancy; 3500 supports power / communication / module redundancy