I. Basic Information
Model：1900/65A-00-00-01-00-01
Brand：Bently Nevada
Product Positioning
The Bently 1900/65A general-purpose equipment monitor is an integrated condition monitoring, alarm and protection device for small and medium-sized rotating machinery and general industrial dynamic equipment. Different from 3500/3700 rack modular systems, it is an independent integrated instrument requiring no matching rack, supporting on-site installation and independent networking, specially designed for fans, water pumps, motors, small compressors and gearboxes. It integrates vibration monitoring, temperature monitoring, speed monitoring, signal conditioning, logic alarm, relay interlock, data communication and local display functions. A single device can complete equipment condition collection, over-limit alarm, interlock protection and data upload, suitable for intelligent monitoring transformation of conventional industrial equipment, replacement of old on-site instruments and expansion of equipment condition sensing points.
Hardware Architecture
Adopting industrial integrated monitoring architecture, it is equipped with a 24-bit high-precision ADC sampling core, multi-channel independent signal conditioning unit, temperature acquisition module, logic operation chip, relay output loop, data storage unit and full-domain self-diagnosis system. The integrated reinforced sheet metal structure adopts isolated wiring of strong and weak currents, built-in EMI filtering, surge suppression and electrostatic protection circuits with excellent anti-interference performance. It integrates independent sensor excitation power, signal buffer output, analog transmission output and programmable relay output with highly integrated hardware functions. The built-in 1024-byte EEPROM storage unit can retain 200 equipment event and fault logs for working condition traceability and fault review. The pure solid-state main control circuit has no mechanical loss parts, supporting 7×24-hour uninterrupted continuous operation with stable performance and no parameter drift for long-term operation.
Mounting Specification
It supports standard industrial panel embedded installation, adapting to conventional control cabinet and on-site protection box opening sizes with convenient installation and firm fixation, requiring no special rack or backplane bus. Equipped with a local high-definition display screen and operation keys, it can complete parameter configuration, range setting, threshold modification, status viewing and fault reset on site without external upper computer software. The display can be installed remotely up to 75 meters away from the host, adapting to flexible layout of on-site observation points. The panel is equipped with multi-function status indicators to intuitively feedback equipment operation, alarm, fault and interlock status, supporting rapid on-site inspection and fault location, fully complying with Bently original installation and commissioning specifications.
Compatible Systems
It supports independent stand-alone operation without supporting rack system, and can independently complete on-site equipment monitoring and protection functions. Natively compatible with all Bently proximity probes, acceleration sensors and velocity sensors, as well as industrial standard RTDs and thermocouples without additional signal conversion equipment. It supports Modbus RTU and CANopen dual communication protocols, seamlessly docking with PLC, DCS and SCADA upper industrial control systems for remote data acquisition, parameter monitoring and status upload. It is equipped with multiple 4-20mA analog outputs, relay switching outputs and channel buffer outputs, compatible with recorders, industrial instruments, interlock loops and debugging equipment with strong networking adaptability.
Product Characteristics
As an original industrial high-precision general monitoring device, it has passed strict full-item tests including full-function aging, full-load pressure test, high and low temperature impact and EMC electromagnetic compatibility before delivery, with high acquisition accuracy, stable operation and wide working condition adaptation. It supports multi-type signal compatible acquisition, programmable threshold logic, independent two-level alarm, event log storage, channel self-diagnosis and signal abnormality identification, which can accurately filter on-site interference signals and eliminate false alarms and false interlocks. The integrated maintenance-free design features high integration, compact size and flexible deployment, greatly reducing deployment cost and operation difficulty compared with rack systems. With CE and UL industrial certifications, it is suitable for general equipment monitoring scenarios in power, petrochemical, metallurgical and water treatment industries, realizing unattended operation, visual status and early fault warning upgrading for traditional equipment.
II. Technical Specifications
1. Channel Configuration & Acquisition Parameters
Sensor Input Channels: Equipped with 4 universal sensor inputs, which can be software-configured to adapt to proximity probes (displacement), acceleration sensors and velocity sensors, supporting collection of shaft vibration, casing vibration and reciprocating equipment vibration signals. Temperature Input Channels: Equipped with 4 independent temperature inputs, fully compatible with industrial standard RTDs and thermocouples, capable of monitoring equipment bearing temperature, shell temperature and medium temperature. Sampling Accuracy: Adopting 24-bit high-precision ADC analog-to-digital conversion unit with delicate signal analysis and extremely low acquisition error, which can accurately capture tiny equipment working condition fluctuations and early fault features. Range Configuration: Supports user-defined range, scale factor and measuring range, adapting to different equipment rated working conditions and monitoring accuracy requirements with high configuration flexibility.
2. Output & Interface Parameters
Relay Output: Built-in 6 programmable relay outputs, which can be freely associated with equipment OK, Alert and Danger statuses, supporting custom interlock logic, and can directly drive alarm loops, shutdown protection loops and acousto-optic alarm devices to independently complete interlock protection actions. Analog Output: Equipped with 4 independent 4-20mA recorder outputs, which can standardize and transmit monitoring parameters such as vibration, temperature and speed to seamlessly connect with industrial secondary instruments, DCS and PLC systems for remote data recording and monitoring. Buffer Output: Each sensor channel is equipped with a dedicated buffer output interface to output original dynamic waveform signals, supporting external connection of debugging equipment and waveform recorders for on-site fault traceability and precision commissioning. Control Input: Supports custom inhibit and trip multiply inputs, which can be software configured as interlock inhibit or threshold multiply mode to adapt to special working conditions such as unit start-stop and process switching.
3. Communication & Storage Parameters
Communication Protocol: Supports Modbus RTU and CANopen dual industrial communication protocols, compatible with mainstream industrial control system networking standards, with stable communication, low delay and strong compatibility, enabling remote parameter reading, status monitoring and fault information upload. Storage Configuration: Built-in 1024-byte EEPROM power-off storage unit, which can save 200 complete event logs, including alarm records, fault time, parameter over-limit and equipment status changes, with no data loss after power failure, supporting equipment fault traceability and operation data analysis. Parameter Configuration: All range, threshold, logic and communication parameters can be configured locally via keys or remotely via upper computer, supporting parameter saving, backup and recovery for convenient and efficient commissioning.
4. Electrical & Operating Parameters
Power Supply Voltage: Standard wide-range DC power supply 9VDC～32VDC, adapted to industrial 24VDC conventional power supply systems, resisting small grid fluctuations and instantaneous voltage disturbances with strong power supply adaptability. Output Load: Maximum relay output load 50mA, with stable load capacity and reliable action, adapting to load requirements of conventional industrial interlock loops. Insulation Performance: Complete electrical isolation of high and low voltage with insulation resistance ≥1000MΩ@500VDC, high insulation grade, eliminating equipment abnormalities caused by electric leakage, signal crosstalk and electrostatic impact. Operating Frequency: Adapted to industrial standard 50Hz/60Hz power frequency working conditions with no frequency adaptation deviation in full-domain operation.
5. Environmental & Mechanical Parameters
Operating Temperature：-30℃～+65℃, ultra-wide temperature adaptation to complex high and low temperature working conditions of industrial sites and cabinets, with no attenuation of full-temperature acquisition accuracy and operating performance.
Storage Temperature：-40℃～+85℃
Operating Humidity：5%~95% RH, non-condensing, resisting humid and alternating water vapor working conditions without condensation short circuit or circuit oxidation failure.
Structural Dimensions: 196.9mm×149.4mm×74.4mm (L×H×D), compact integrated design with panel embedded installation, small space occupation, adapting to layout of various control cabinets and on-site protection boxes.
Weight: Approx. 0.77kg, lightweight reinforced structure with stable and anti-loosening installation, resisting continuous on-site vibration working conditions.
Environmental Adaptation: Passed full-domain EMC electromagnetic compatibility and industrial vibration impact tests, capable of resisting high-frequency electromagnetic interference from frequency converters and high-power equipment, adapting to harsh industrial on-site working conditions such as dust, vibration and alternating temperature and humidity.
III. Key Features
1. Integrated Multi-Channel & Multi-Parameter Monitoring
A single device integrates 4 vibration universal acquisition channels and 4 temperature acquisition channels, which can synchronously monitor multi-dimensional core parameters such as equipment vibration, displacement, temperature and speed, fully covering conventional monitoring requirements of general rotating equipment such as fans, water pumps, motors and small compressors. One device replaces multiple traditional independent monitoring instruments, temperature transmitters and alarm devices, greatly simplifying on-site equipment layout, reducing wiring costs and lowering equipment failure rates. Each channel can be independently configured with sensor types and monitoring modes, flexibly adapting to monitoring requirements of different measuring points and equipment, suitable for intelligent monitoring transformation of various general industrial equipment.
2. High-Precision Acquisition & Intelligent Disturbance Identification
Adopting 24-bit high-precision ADC sampling core and multi-stage signal conditioning circuit, it features high signal acquisition resolution and fast dynamic response, which can accurately capture early weak fault features of equipment. It supports independent programmable two-level thresholds of Alert and Danger, combined with delay judgment, interference filtering, threshold multiplication and interlock inhibit functions, which can accurately distinguish real equipment faults, normal process fluctuations and on-site electromagnetic interference, effectively eliminating false alarms and false interlocks caused by instantaneous signal disturbance. The built-in full-domain channel self-diagnosis function can real-timely identify faults such as sensor line break, short circuit, signal over-range and line abnormality, timely triggering alarm prompts to eliminate hidden dangers of monitoring failure and fault missing judgment.
3. Rich Output Logic for Independent Closed-Loop Protection
The device integrates 6 programmable relay outputs, 4-20mA analog outputs and multi-channel buffer waveform outputs to build a complete closed-loop system of monitoring, alarm, interlock and data transmission. Relays can be freely associated with equipment operation, warning and danger statuses, and can directly drive on-site acousto-optic alarm and equipment shutdown interlock loops without external intermediate controllers, realizing independent on-site protection. Analog outputs accurately upload working condition parameters to upper systems, and buffer outputs support on-site waveform commissioning and fault traceability, meeting multiple requirements of equipment safety protection, remote monitoring and on-site refined operation and maintenance, realizing unattended equipment safety management with a single device.
4. Dual-Protocol Communication & Log Storage for Intelligent O&M
Compatible with Modbus RTU and CANopen dual mainstream industrial communication protocols, it can seamlessly connect with various upper industrial control systems to realize remote visualization of equipment status, remote parameter configuration and remote fault alarm, adapting to the intelligent factory centralized operation and maintenance mode. The built-in large-capacity power-off storage can retain 200 complete equipment event logs, accurately recording key information such as alarm time, over-limit parameters, status changes and interlock actions, with no data loss after power failure, providing complete data support for equipment fault traceability, working condition analysis and predictive maintenance, assisting equipment condition-based maintenance and accurate operation and maintenance.
5. Flexible & Maintenance-Free Deployment for Multi-Scenario Renovation
The integrated independent structure requires no special rack, backplane bus or supporting modules, featuring convenient deployment and strong adaptability. It can directly replace old decentralized monitoring instruments and simple inspection devices. It supports local key commissioning and remote configuration, and the display screen can be installed remotely for flexible on-site observation. The pure solid-state integrated circuit has no mechanical loss parts, low power consumption and low heat generation, with strong adaptability to wide temperature and humidity working conditions, stable and reliable 7×24-hour continuous operation and excellent maintenance-free performance, greatly reducing the monitoring operation and maintenance costs and fault shutdown risks of general industrial equipment.
IV. Working Principle
As an integrated independent equipment condition monitoring and protection device, the Bently 1900/65A-00-00-01-00-01 general-purpose equipment monitor is mainly responsible for the collection, conditioning, operation, judgment, alarm and interlock output of vibration, temperature and speed signals of general industrial dynamic equipment. It can independently complete the closed-loop control of equipment safety monitoring and protection without rack system, widely used in on-site intelligent monitoring of small and medium-sized rotating equipment. The device adopts panel embedded installation, accesses on-site measuring point signals through front-end sensor cables, and realizes full-process independent operation relying on internal integrated acquisition and control circuits.
After power-on, the device automatically completes hardware self-inspection, channel initialization, parameter loading and communication handshake, and enters normalized monitoring operation state after successful self-inspection. During operation, 4 universal sensor channels synchronously receive original vibration and displacement signals from proximity, acceleration and velocity sensors, and 4 temperature channels synchronously collect temperature signals from RTDs and thermocouples. All signals undergo pre-amplification, multi-stage filtering, signal demodulation and 24-bit high-precision AD conversion to convert analog signals into standardized digital signals, completing accurate operation and calibration of vibration amplitude, temperature value, speed and other parameters.
The device real-timely compares the calculated working condition parameters with user preset warning and danger thresholds, and accurately identifies equipment operating status combined with custom logic such as delay judgment, threshold multiplication and interlock inhibit. When parameters are normal, it maintains normal equipment operation; when parameters exceed limits or channel abnormalities occur, it immediately triggers corresponding level alarms, lights panel status indicators, drives relays to output interlock signals, and completes equipment alarm or shutdown protection actions. Meanwhile, it automatically retains event logs and synchronously uploads data to upper systems via 4-20mA analog and industrial communication protocols. The whole process relies on self-diagnosis mechanism to monitor hardware and signal status, ensuring accurate monitoring, reliable protection and stable operation of the device.
V. Application Scenarios
1. On-Site Monitoring and Protection of General Rotating Equipment: Applied to small and medium-sized rotating dynamic equipment such as industrial fans, induced draft fans, forced draft fans, industrial water pumps, oil pumps, motors, small compressors and gearboxes, synchronously monitoring core parameters such as vibration, temperature and speed to realize on-site over-limit alarm and safety interlock protection.
2. Upgrading and Replacement of Old Simple Monitoring Systems: In-situ replacement of old single-function temperature meters, vibration meters and on-site alarm instruments, upgrading decentralized monitoring to integrated intelligent monitoring and protection equipment, unifying equipment management standards and improving monitoring accuracy and protection reliability.
3. Intelligent Transformation of Equipment Without Rack Systems: Building low-cost independent intelligent monitoring systems for conventional equipment without 3500/3700 large rack monitoring systems, realizing equipment status visualization, fault early warning and automatic interlock, adapting to intelligent upgrading needs of small and medium-sized devices.
4. Expansion of Industrial Control System Data Collection: Serving as a front-end high-precision collection terminal to connect with PLC, DCS and SCADA upper systems, supplementing on-site equipment condition monitoring points, improving the factory-wide equipment condition perception network and supporting centralized equipment monitoring and data analysis.
5. Equipment Protection for Unattended Working Conditions: Adapted to unattended device working conditions such as water treatment, metallurgy, light industry and utility engineering, realizing unattended safe operation of equipment relying on automatic monitoring, fault alarm and interlock protection functions, reducing manual inspection pressure.
