3300/12-02-20-00 Product Description Product Introduction

3300/12-02-20-00 is the Benelit 3300 series dual-channel shaft displacement monitoring module, which is the core component of the large-scale rotating machinery condition monitoring system. The product adopts high-precision signal processing circuits and mature industrial design, focusing on the real-time monitoring of the shaft displacement parameters of the unit. The overall structure is compact and the operation is stable. It has extremely strong on-site anti-interference ability and can work continuously in complex industrial conditions for a long time. This module can accurately capture the axial position changes of the rotating shaft, promptly detect abnormal problems such as shaft wobbling and displacement exceeding the standard, effectively avoid equipment failures such as shaft friction and component damage, and is the key monitoring equipment for ensuring the safe and continuous operation of heavy-duty power units. Basic Information

This product belongs to the 3300 modular monitoring system. The model fully indicates the number of channels, hardware configuration and functional specifications. The equipment adopts a standard rack plug-in modular design. Its size is compatible with the universal system rack of the 3300 series. Installation, disassembly, debugging and later maintenance operations are simple and convenient. The on-site wiring is neat and efficient. The entire machine is strictly manufactured in accordance with industrial electrical safety and electromagnetic compatibility standards. The body shell has dust-proof and slight mechanical shock-proof protection performance. It can adapt to conventional working environments such as industrial cabinets, production device areas, and computer rooms. It adopts an industrial standard power supply scheme and can be used in conjunction with the same series power module. The electrical interface is unified and standardized, enabling quick connection to the entire monitoring and control loop.

Functions and Positioning

This module is positioned as a dedicated monitoring unit for dual-channel shaft displacement. The two monitoring channels are independent of each other and can simultaneously connect two sets of front-end sensing signals. The equipment receives, amplifies, filters, shapes and converts the original signals of the sensors, accurately collecting core parameters such as the axial displacement and shaft runout of the rotating machinery's shaft. The processed standard signals can be synchronously transmitted to the upper-level control system, data recorder, on-site display instrument, achieving real-time data display, long-term storage and operation record traceability. The module is equipped with multiple levels of customizable alarm thresholds and fault judgment logic, capable of identifying various abnormal states such as displacement over-limit, signal interruption, and sensor failure. Once the monitoring value exceeds the safety range, an alarm signal is immediately output to alert the maintenance personnel to promptly identify and eliminate potential hazards. It is mainly applied in daily condition inspections of units, early fault warnings, and shaft system operation control scenarios, reducing the risk of shutdown and safety accidents caused by abnormal shaft displacement from the source.

Core Performance Parameters

The module is compatible with the input signals of the same series eddy current sensors. The signal acquisition sensitivity is high, effectively filtering out on-site noise and interference signals. The dual channels work independently without interfering with each other, and the measurement range meets the general requirements for axial displacement monitoring of large and medium-sized rotating machinery. The measurement linearity and repeatability accuracy all reach industrial standards, with extremely low data drift during long-term uninterrupted operation. The equipment has excellent electromagnetic compatibility performance, capable of resisting electromagnetic interference from large-power motors, frequency converters, and high-voltage lines, ensuring the authenticity and stability of the monitoring data. It supports 7×24-hour continuous operation, with an average fault-free working time meeting the requirements of industrial continuous production equipment. The output is a universal industrial standard signal, with wide compatibility, and can be connected to various mainstream industrial control devices, alarm units, and data acquisition equipment. The working temperature and humidity range of the equipment is compatible with conventional industrial indoor and cabinet environments, with excellent environmental tolerance.

General Compatible Accessories

The front end can be equipped with 3300 series eddy current probes, extension cables, preamplifiers and other dedicated sensing components to ensure signal acquisition quality. On-site installation can be combined with shielded signal cables, standard terminal blocks, module fixing clips, etc., to meet wiring and fixation requirements. The system end can be combined with 3300 series system racks, power supply modules, vibration monitoring modules, speed monitoring modules, relay output modules, communication modules, etc., to build an integrated monitoring system. It can be flexibly expanded and configured according to the on-site monitoring points and functional requirements. The equipment interfaces and vulnerable components all adopt series general specifications, with convenient spare parts procurement and replacement, and daily maintenance can be completed using conventional industrial electrician tools. 

Applicable Equipment Domains

The product is widely used in thermal power generation, petrochemicals, metallurgy, coal chemical industry, large-scale equipment manufacturing, etc., and is compatible with various large and medium-sized rotating machinery such as steam turbine generators, gas turbines, centrifugal compressors, large fans, smoke turbine, high-pressure pump sets, large gear transmission units, etc. It is mainly deployed in the main plant buildings of power plants, chemical production areas, metallurgical power workshops, and power machine rooms of industrial enterprises, providing dual-channel shaft displacement monitoring and safety protection for continuous operation of heavy-duty power equipment.