I. Basic Information
Model：1900/65A-00-04-01-00-00
Brand：Bently Nevada
Product Positioning
The 1900/65A is a high-performance General Purpose Equipment Monitor in the 1900 series. It is an integrated panel-mounted machinery protection unit that independently integrates signal acquisition, algorithm analysis, alarm interlock, data transmission and local display. Designed for medium and small rotating machinery and general power equipment, it monitors vibration, shaft displacement, speed and temperature parameters. Widely applicable to fans, water pumps, small compressors and speed reducers, it meets the low-cost and standardized TSI monitoring demands of general industrial equipment and fully complies with API 670 mechanical protection standards, serving as the core on-site monitoring and protection device for auxiliary machinery.
Hardware Architecture
Adopting a compact integrated panel-mounted structure, the unit is equipped with an industrial 24-bit high-precision ADC chip, 25kHz wide-band signal processing unit, multi-channel independent signal conditioning circuit, programmable logic operation unit and embedded communication module. It integrates 4 dynamic process input channels and 4 thermocouple temperature input channels with parallel independent acquisition without mutual interference. Built with 6 programmable relay outputs, 4 isolated 4-20mA analog outputs and sensor buffer output circuits, as well as large-capacity event storage and self-diagnosis units. The full electrical isolation design of input, output, power and communication effectively resists on-site electromagnetic interference and signal crosstalk. The front LCD screen and operation keys support local parameter viewing, configuration and fault query, realizing independent monitoring and protection without external host equipment.
Mounting Specification
Adopting standard cabinet panel embedded mounting, it requires no dedicated rack or backplane bus with simple installation and strong compatibility. The compact integrated structure occupies small space and is suitable for new equipment matching, old system renovation and on-site monitoring point expansion. It supports online configuration and parameter modification without power-off or disassembly, facilitating daily maintenance. Automatic power-on self-test and initialization enable quick commissioning after simple configuration, perfectly adapting to standardized monitoring and upgrading of mass general industrial equipment.
Compatible Systems
It supports independent standalone operation without relying on large TSI rack systems, realizing full functions of monitoring, alarming and interlock protection. Compatible with dedicated 1900 series configuration software for local debugging and parameter setting. Standard Modbus protocol enables seamless connection with PLC, DCS and SCADA upper systems for remote data upload and event traceability. The 4 programmable 4-20mA analog outputs and 6 relay contacts can be directly connected to industrial control and interlock loops, fully meeting the requirements of industrial automatic monitoring, safety interlock, data archiving and compliance acceptance.
Product Characteristics
Integrated multi-parameter monitoring realizes full-dimensional collection of vibration, displacement, speed and temperature with strong universality. 24-bit high-precision sampling and 25kHz wide-band response ensure accurate signal acquisition and complete waveform restoration for early latent fault identification. Fully customizable range, filtering, alarm threshold and interlock logic adapt to working conditions of various general equipment. The built-in 200-event storage function supports fault review and operation analysis. The industrial full-isolation anti-interference design enables 7×24-hour uninterrupted stable maintenance-free operation, serving as the preferred lightweight TSI monitoring device for general industrial equipment.
II. Technical Specifications
1. Channel Configuration & Acquisition Parameters
Dynamic Process Channels: 4 independent programmable universal input channels, configurable for eddy current probes, velocity sensors, acceleration sensors and speed sensors to monitor shaft vibration, casing vibration, shaft displacement and rotational speed. Temperature Channels: 4 independent thermocouple input channels, compatible with K, J, E, T-type thermocouples for bearing, shell and medium temperature monitoring. Sampling Accuracy: 24-bit ADC ultra-high precision sampling with low measurement error and excellent data stability. Signal Bandwidth: 0Hz～25kHz wide frequency response, covering full-band vibration, transient impact and speed fluctuation signals of general equipment. Each channel supports 4 independent operation variables with separate integration, filtering and peak value algorithms for refined monitoring.
2. Output & Contact Parameters
Relay Output: 6 built-in programmable passive relay contacts, supporting multi-level logic configuration of OK, Alert and Danger, as well as multi-channel voting logic for graded alarm and interlock protection. Contact Capacity: DC 60V/5A, AC 30V/5A with strong load capacity for direct access to on-site control loops. Contact Life: 200,000 operations under 24Vdc and 100,000 operations under 250Vac for long-term reliable performance. Analog Output: 4 isolated programmable 4-20mA recorder outputs, bindable to any channel variable for accurate full-scale remote transmission. Buffer Output: Independent buffer signal output for each sensor channel for secondary waveform analysis and deep diagnosis.
3. Power & Electrical Parameters
Operating Power Supply: Standard industrial 24Vdc power supply with low power consumption and low heat generation, adapting to long-term closed cabinet operation. Electrical Isolation: Full electrical isolation of all input, output, communication and power loops with high insulation level to avoid equipment faults and data abnormalities caused by static surge and signal crosstalk. Communication Configuration: Standard Modbus RTU interface for remote data reading, parameter query and event retrieval, compatible with mainstream industrial control protocols. Configuration Port: Dedicated local debug port for online configuration, parameter modification, firmware upgrade and fault diagnosis.
4. Environmental Operating Parameters
Operating Temperature：-30℃～+70℃, stable acquisition accuracy, logic function and communication performance in the full temperature range, adapting to alternating high and low temperature and closed cabinet heat accumulation.
Storage Temperature：-40℃～+85℃, resistant to long-term high and low temperature storage without hardware aging, parameter offset or structural damage.
Operating Humidity：5%~95% RH, non-condensing, adapting to humid, dusty and slightly corrosive cabinet environments without circuit moisture, insulation decline or poor contact faults.
Working Condition Adaptation: Passed full industrial tests including EMC electromagnetic compatibility, vibration impact and high-low temperature cycle, stably resisting harsh working conditions such as on-site frequency converter interference, continuous equipment vibration and cabinet heat accumulation. Protection Grade: Front panel IP66, body IP20, compliant with industrial indoor cabinet installation and equipment safety specifications.
5. Storage & Diagnosis Parameters
Event Storage: Built-in large-capacity storage, saving 200 timestamped events including alarm trigger/reset, status switching, parameter modification and hardware faults to support fault traceability and maintenance review. Self-Diagnosis: Real-time hardware self-inspection, channel status diagnosis and sensor status monitoring, accurately identifying channel disconnection, signal abnormality, hardware fault and communication exception with local screen prompt for rapid troubleshooting.
III. Key Features
1. Integrated Multi-Parameter Monitoring with Full Universal Compatibility
Integrating 4 dynamic process channels and 4 temperature channels, the 1900/65A realizes full-dimensional monitoring of vibration, displacement, speed and temperature with a single device, covering most general rotating equipment such as fans, pumps, compressors and reducers. It replaces traditional scattered meters (vibration meter, speedometer, temperature meter) in one piece, greatly simplifying on-site instrument architecture and reducing procurement and operation costs for standardized monitoring upgrading of general equipment.
2. High-Precision Sampling & Flexible Configuration for Complex Conditions
Equipped with 24-bit high-precision ADC and 25kHz wide-band signal processing, matched with 8-stage programmable filtering, independent integration and peak control, it effectively filters on-site process clutter and electromagnetic interference to restore pure equipment operating signals. Each channel supports custom multi-variable operation, with freely configurable range, scale factor, filtering parameters and alarm logic, adapting to precision monitoring and protection logic requirements of different equipment and working conditions, and significantly reducing false and missing alarm rates.
3. Graded Programmable Alarm & Interlock for Reliable Safety Protection
The device supports independent two-level threshold setting (Alert/Danger) and 6 programmable relays with multi-channel voting logic and custom interlock strategies, realizing single-parameter over-limit alarm and multi-parameter linkage shutdown protection. It quickly and accurately triggers alarm prompts and interlock actions for equipment faults such as excessive vibration, over-temperature, abnormal speed and over-limit displacement, effectively preventing bearing burnout, severe vibration, overload damage and unit trip accidents to ensure stable operation of general equipment.
4. Complete Data Storage & Communication for Intelligent O&M
The 200-piece large-capacity timestamped event recording fully records equipment operation status, alarm events and parameter changes, providing complete data support for fault review, technical optimization and maintenance analysis. Standard Modbus communication and 4-20mA analog output seamlessly connect with DCS, PLC and SCADA systems to realize remote real-time monitoring, trend traceability and data archiving, adapting to factory intelligent management and compliance operation requirements.
5. Rack-Free Integrated Design for Efficient Maintenance
Adopting independent panel mounting without dedicated rack or backplane bus, it features simple installation and wide adaptability, especially suitable for old equipment renovation, monitoring point expansion and space-limited scenarios. The built-in LCD screen and keys support local parameter viewing, configuration modification and fault query, realizing independent commissioning and maintenance without external equipment. The industrial reinforced hardware design supports 7×24-hour uninterrupted maintenance-free operation, greatly reducing on-site maintenance workload.
IV. Working Principle
The BENTLY 1900/65A-00-04-01-00-00 general-purpose equipment monitor operates based on multi-signal adaptive acquisition, high-precision digital operation, programmable filtering shaping, graded logic judgment and multi-port signal output, realizing full-parameter condition monitoring and safety protection for general power equipment. The workflow includes six core links: signal acquisition, signal conditioning, data calculation, logic judgment, data output and data storage.
Multi-channel synchronous acquisition collects analog signals and thermocouple temperature signals from front-end sensors. The built-in independent isolation conditioning circuit and multi-stage programmable filter eliminate on-site electromagnetic clutter, process pulsation and environmental interference to restore pure original equipment operating signals. The 24-bit high-speed ADC completes high-precision digital sampling, and the embedded operation unit calculates core monitoring variables such as vibration velocity, acceleration, shaft displacement, speed and temperature in real time, as well as derivative parameters including peak value, effective value and integral quantity according to configured parameters.
The system compares measured parameters with preset Alert and Danger thresholds for graded logic judgment. It immediately triggers local screen alarm prompts and relay interlock actions and automatically records timestamped fault events when parameters exceed limits or signals are abnormal. Finally, the device uploads real-time operating data, status information and event records to upper systems via Modbus bus, and remotely transmits parameters through 4-20mA analog output, realizing all-round equipment protection of local monitoring, remote management, fault early warning, safety interlock and data traceability.
V. Application Scenarios
1. Integrated Monitoring of General Rotating Equipment: Applied to full-parameter monitoring and protection of fans, induced draft fans, water pumps, oil pumps, small compressors and speed reducers in power, petrochemical, metallurgical and HVAC industries.
2. Old Equipment Renovation & Upgrading: Quickly supplement standardized condition monitoring and interlock protection functions for old units without dedicated TSI protection, realizing low-cost intelligent and compliant upgrading.
3. Lightweight Protection for On-Site Auxiliary Equipment: Meet independent monitoring demands of scattered on-site equipment without building large rack systems, simplifying on-site instrument configuration.
4. Equipment Fault Prediction & O&M Optimization: Realize early fault warning and fault review through real-time data trends, event records and buffer waveform output, support predictive maintenance and reduce unplanned downtime.
5. Factory Automation System Integration: Seamlessly access factory DCS and PLC systems via Modbus and 4-20mA output to realize centralized equipment status management, unified data archiving and remote intelligent monitoring.
