Product Specification Document: Bently Nevada 1900/65A

1. Product Overview

2. Basic Product Information

Manufacturer and Model Identity

• Manufacturer: Bently Nevada, a Baker Hughes company

• Model Number: 1900/65A

• Product Series: 1900 Cordant Series General Purpose Equipment Monitor

• Product Type: Standalone Multi-Channel Machinery Condition Monitor

• System Compatibility: 3300 XL proximity probes, velocity transducers, ICP accelerometers, Type E/J/K/T thermocouples, Pt100/Pt1000 RTDs, Modbus RTU-enabled DCS, SCADA, and PLC systems

• Country of Origin: United States

• Main Components: Main monitor assembly, integrated LCD display, tactile keypad, multi-functional LED status indicators, removable screw terminal blocks

Electrical Characteristics

• Power Supply: 9–32 VDC (nominal 24 VDC); optional 90–250 VAC universal AC input via configured variants

• Power Consumption: Maximum 15 W under full-load conditions

• Signal Processing: 24-bit high-resolution ADC per channel, 25 kHz bandwidth, configurable 4–8 pole high-pass/low-pass filters (0.5 Hz–25 kHz)

• Input Channels: 4 universal transducer inputs (configurable for proximity, velocity, acceleration, Keyphasor); 4 dedicated temperature inputs (thermocouple/RTD compatible)

• Output Interfaces: 6 programmable SPDT relay outputs (Alert/Danger/OK); 4 galvanically isolated 4–20 mA analog outputs; 1 buffered raw signal output per transducer channel for external analysis

• Communication: RS-485 Modbus RTU (baud rate 9600–115200 bps); optional Ethernet Modbus TCP on select variants

• Isolation: Complete galvanic isolation between power, inputs, outputs, and communication ports to eliminate ground loops

Physical and Mechanical

• Enclosure: Heavy-duty metal housing with EMI shielding; conformal-coated PCB for dust, moisture, and chemical resistance

• Mounting: Standard 35 mm DIN rail; panel-mount compatible

• Terminals: Removable screw terminals (12–22 AWG) for easy wiring and maintenance

• Human-Machine Interface: LCD for real-time data and configuration; LED indicators for power, run, alarm, and fault status

• Ingress Protection: IP20 (standard indoor cabinet installation)

Environmental Limits

• Operating Temperature: -20 °C to +70 °C (-4 °F to +158 °F)

• Storage Temperature: -30 °C to +90 °C (-22 °F to +194 °F)

• Relative Humidity: 5%–95% RH, non-condensing

• Vibration Resistance: 5 g continuous (10 Hz–1 kHz)

• Shock Resistance: 10 g transient mechanical shock

Compliance and Certification

• Applicable Standards: API 670, ISO 10816, IEC 61000-6-2, IEC 61000-6-4

• Certifications: CE, cULus, ATEX Zone 2, RoHS, ABS marine certification

• Hazardous Area Rating: Class I Division 2 / Zone 2, Temperature Class T4 (non-incendive locations)

• Quality Control: ISO 9001 manufacturing; full calibration and functional testing prior to shipment

• Lifecycle Status: Active production with full support for new projects, retrofits, and expansions

3. Function and Product Positioning

Core Functions

• Multi-Parameter Monitoring: Simultaneous measurement of shaft vibration (displacement/velocity/acceleration), axial position, speed, phase, and bearing/process temperature for full machinery health visibility

• Flexible Signal Configuration: Software-selectable sensor types per transducer channel; configurable filters and scaling for diverse measurement needs

• Dual-Alarm Management: Independent Alert and Danger setpoints per channel with adjustable hysteresis; six relays programmable for alarm, trip, or interlock logic

• Fault Diagnosis & Event Logging: Automatic detection of sensor open/short circuits and signal anomalies; non-volatile memory stores 200 time-stamped events for traceability

• Data Integration: Modbus RTU for real-time data upload to DCS/SCADA; isolated 4–20 mA outputs for recorders and analog I/O

• Local Operation: Onboard display/keypad for on-site viewing, configuration, and alarm reset without external software

Operational Features

• Wide Sensor Compatibility: Full support for Bently Nevada 3300 XL sensors and third-party accelerometers, velocity probes, thermocouples, and RTDs

• Hot-Swap Capability: Unit replacement during system operation to minimize downtime

• Data Security: Configuration and event logs stored in non-volatile memory (no loss on power cycle)

• Scalable Deployment: Standalone use or networked via Modbus for multi-unit monitoring systems

Product Positioning

4. Core Performance Parameters

Measurement Performance

• Transducer Channels: Frequency response 0.5 Hz–25 kHz; vibration ranges 10–500 mm/s (velocity), 20–500 m/s² (acceleration), 0–2 mm (displacement)

• Temperature Channels: Thermocouple -200 °C to +1300 °C; RTD -200 °C to +850 °C

• Accuracy: ±0.1% FS (transducer); ±0.5 °C (temperature)

• Repeatability: ±0.05% FS

• Filter Options: 4–8 pole configurable high-pass/low-pass filters

Output Performance

• Relay Ratings: 5 A @ 30 VDC; NO/NC contacts configurable

• Analog Output: 4–20 mA isolated, 500 Ω max load, ±0.1% FS accuracy

• Communication: Modbus RTU, up to 247 slaves per RS-485 network

Reliability

• MTBF: >150,000 hours (25 °C standard conditions)

• Warranty: 1-year standard factory warranty; extended options available

• Maintenance: No mandatory maintenance; annual calibration and visual inspection recommended

5. General Matching Accessories

Installation Accessories

• Standard 35 mm DIN rail mounting hardware (included)

• Optional panel-mount adapter plate

• External protective enclosure (dust/humid environments)

• Spare terminal blocks and display components

Compatible Sensors

• 3300 XL series proximity probes and extension cables

• Industrial velocity sensors and ICP accelerometers

• Type E/J/K/T thermocouples and Pt100/Pt1000 RTDs

System Integration

• Modbus RTU-based DCS, PLC, and remote monitoring terminals

• 1900 Configuration Software (PC-based setup/calibration)

Documentation & Spares

• Dedicated 1900/65A datasheet and installation manual

• 1900 Series application guide and Modbus protocol specification

• Factory calibration report and test documents (included)

6. Applicable Equipment and Industry Fields

Primary Applications

• Power Generation: Auxiliary pumps, cooling fans, blowers, small compressors (thermal/combined-cycle plants)

• Oil and Gas: Refinery fans, platform pumps, auxiliary compressors, pipeline equipment

• Petrochemical: Process pumps, cooling tower fans, agitators, gear units

Secondary Applications

• Water/Wastewater: Large supply pumps, aeration blowers, process fans

• Pulp & Paper: Drive fans, stock pumps, auxiliary transmission equipment

• Marine/Offshore: Vessel auxiliary pumps, ventilation fans, non-critical rotating equipment

Compatibility Notes

• Power: DC (9–32 VDC) standard; AC variants (90–250 VAC) available

• Sensors: Optimized for 3300 XL proximity probes; compatible with third-party sensors via configuration

• Networking: Assign unique Modbus slave addresses for multi-unit systems

• Hazardous Areas: Use certified safety barriers in Class I Division 1 locations