Bently 1900-65A-00-00-01-00-00 General‑Purpose Equipment Monitor

Description

Hardware & Electrical Specifications

‑ Manufacturer: Bently Nevada (Baker Hughes) ‑ Compatible System: 1900 series machinery monitoring platform ‑ Functional Type: General‑Purpose Multi‑Input Machinery Monitor ‑ Input Channels:  • 4 × configurable dynamic transducer inputs (proximity probe, accelerometer, velocity sensor, tachometer)  • 4 × temperature inputs: RTD (2‑wire /3‑wire), Type E/J/K/T thermocouples ‑ Analog Output: 4 × isolated 4‑20 mA recorder outputs, freely assignable to measurement variables ‑ Relay Output: 6 × programmable SPDT relay contacts for Alert, Danger, module fault ‑ Diagnostics: Per‑channel open‑circuit / short‑circuit transducer fault detection; buffered BNC signal output per channel for waveform inspection ‑ Local Interface: LCD display + push‑button keypad for on‑site reading and setup ‑ Communication Interfaces: RJ45 Ethernet (Modbus‑TCP); RS232/RS485 software selectable serial port (Modbus‑RTU) ‑ Event Storage: 200‑entry fault event history buffer for post‑incident analysis ‑ Auxiliary Power: 18‑36 VDC wide‑range DC power supply ‑ Indicators: Multi‑LED array for power, module fault, channel alarm status ‑ Connectors: Removable screw terminal blocks for power, field I/O and communication; BNC buffered test ports; RJ45 Ethernet ‑ Mounting: 35 mm DIN‑rail or cabinet front‑panel cut‑out mounting ‑ Enclosure: Metal housing, IP20 ‑ Certification: ATEX / IECEx / FM Class I Div 2 hazardous‑location approval (order‑code dependent) ‑ Hot‑swap: Non‑hot‑swappable; de‑energize auxiliary DC power before hardware replacement ‑ Configuration Tool: 1900 Configuration Software for parameter download and firmware upgrade

Environmental Specifications

‑ Operating Temperature: ‑20 °C ~ +60 °C ‑ Storage Temperature: ‑40 °C ~ +85 °C ‑ Relative Humidity: 5%‑95 % non‑condensing ‑ Vibration & Shock: Complies with API‑670 and power‑plant cabinet EMC transient requirements

Mechanical Data

‑ Weight: approx 1.1 kg

Core Functions

1. Multi‑parameter unified acquisition: Collects shaft vibration, thrust displacement, housing vibration, rotating speed and bearing‑temperature signals for auxiliary rotating‑machinery condition evaluationBaker Hugh…。
2. Flexible two‑stage alarm supervision: Configurable Alert / Danger thresholds with adjustable time‑delay filter; latching / non‑latching relay mode selectable for suppressing nuisance alarms during machine startup.
3. Multi‑form output interface: 4‑20 mA analog outputs transmit trending data to plant DCS/PLC; relay contacts output alarm signals to local annunciator.
4. Digital gateway capability: Modbus‑TCP / Modbus‑RTU uploads real‑time measurements, alarm status and event logs to SCADA and System 1 condition‑monitoring software.
5. On‑site troubleshooting support: Local LCD readout; BNC buffered ports output raw transducer waveform for oscilloscope inspection during commissioning and fault diagnosis.

Installation, Replacement & Critical Warnings

1. De‑energize 18‑36 VDC auxiliary power before replacement. Unit is non‑hot‑swappable. Isolate field sensor wiring when servicing terminal blocks.
2. Verify full order suffix matches site power and communication requirements; incorrect variant results in communication function missing.
3. Configure transducer type, measurement range and alarm thresholds according to machinery OEM specification via 1900 configuration software; factory default parameters cannot be used for field operation.
4. After installation, verify LCD readings, 4‑20 mA loop values, relay‑alarm action and Modbus data communication.

5. Common failure mode: Field‑wiring surge damage to input circuits. Investigate transducer cables and grounding when transducer‑fault alarms are triggered.