Product Overview

• PN: 1900/65A-01-01-03-00-01
• Brand: Bently Nevada (Baker Hughes)
• Series: 1900 Series General Purpose Equipment Monitor
• Type: Standalone Integrated Machinery Condition Monitoring & Protection Unit
• Function: Cost-effective single-box monitoring device independent from 3500 rack system, dedicated to auxiliary rotating equipment continuous online protection. It receives signals from proximity probes, velocity transducers, accelerometers, thermocouples and RTD sensors to measure shaft vibration, displacement, rotational speed and bearing temperature. Users configure Alert and Danger threshold via dedicated PC software; the unit triggers relay trip outputs for equipment interlock protection, transmits real-time data via 4-20mA and Modbus to DCS, PLC and System 1 platform, and stores up to 200 historical fault events for equipment troubleshooting.

Model Code Definition

1. 01: 110~220VAC external power supply
2. 01: Front LCD display with operation keypad
3. 03: Ethernet + RS485 Modbus communication gateway
4. 00: No hazardous area certification
5. 01: Standard factory configuration version

Core Features

1. 4 configurable transducer channels compatible with eddy current probes, 2/3-wire velocity sensors and piezoelectric accelerometers
2. 4 temperature channels supporting E/J/K/T type thermocouples and 2/3-wire RTD thermal resistors
3. 6 programmable isolated relay outputs for OK status, alarm indication and emergency shutdown interlock
4. 4 isolated 4-20mA analog outputs mapping arbitrary channel measurement values
5. Front panel BNC buffered signal output for on-site sensor signal inspection and debugging
6. 24-bit high-precision ADC sampling, independent two-stage Alert/Danger alarm setpoints per channel
7. Built-in 200-entry event log recording alarm timestamps and module self-diagnosis faults
8. Dual communication interfaces: Ethernet Modbus TCP and RS485 Modbus RTU for upper system data docking
9. Support DIN rail mounting, wall mounting and NEMA 4X sealed enclosure installation
10. Complete self-test function to identify sensor open circuit, short circuit and hardware failure automatically

Technical Specifications

• Input Channels: 4 dynamic measurement channels, 4 temperature channels
• Power Supply: 110~220VAC 50/60Hz external power adapter
• Communication: 10/100Mbps Ethernet, RS485 Modbus RTU
• Relay Contact Rating: 5A@250VAC / 5A@30VDC
• Operating Temperature: -40℃ ~ +85℃
• Dimension: 196.9 × 149.4 × 74.4 mm
• Net Weight: 0.77 kg
• HS Code: 8538900000
• Certifications: CE
• Product Status: Discontinued original production, brand new original and fully tested refurbished spare parts available

Compatibility

• Supported Sensors: 3300XL proximity probes, Velomitor velocity transducers, ICP accelerometers, industrial thermocouples and RTDs
• Upper-level Systems: DCS, PLC, SCADA, Bently Nevada System 1 predictive maintenance software
• Configuration Tool: Official 1900 Series dedicated parameter setting software
• Incompatible Devices: 3500 rack backplane bus system, third-party non-Bently monitoring racks

Application

1. Condition monitoring and safety protection for cooling tower fans, water pumps, blowers, compressors, coal mills and small hydro turbines in power, petrochemical, water treatment and mining industries
2. Auxiliary machinery vibration and temperature online monitoring instead of large-scale 3500 rack frame system to reduce project cost
3. Retrofit upgrade and spare replacement of legacy standalone monitoring units for balance-of-plant equipment