Bentley 3300/95-01-07-03-00-02-03-48-02-00-03-01-00 Multi-channel Four-Channel Monitoring Module Detailed Product Description

I. Product Overview

The Bentley 3300/95 is a core module of the Bentley Nevada 3300 series TSI system. This model is a four-channel programmable multi-function monitoring card that can be flexibly configured to monitor various rotational machinery parameters such as radial vibration, axial displacement, shaft eccentricity, and phase rotational speed. It is widely used in large-scale units such as steam turbines, gas turbines, centrifugal compressors, and generators. This complete model is a standard industrial configuration version without explosion-proof design. It features independent signal processing, multi-level alarms, standard analog quantities and relay outputs. The overall design complies with API 670 industry standards and is suitable for ordinary industrial areas in the power, petrochemical, and metallurgical industries. It enables online equipment monitoring, fault early warning, and safety interlock protection.

II. Complete Model Decoding

3300: This is the classic Bentley 3300 series modular steam turbine monitoring instrument system. It is installed on a standard frame and supports hot swapping, module expansion, and centralized power supply.

95: Module function code, representing a four-channel general multi-function monitoring module. The four input channels can be configured independently or grouped for different monitoring functions.

01: Basic measurement type configuration, default compatible with the 3300 XL series 8mm eddy current probe system, standard signal input mode.

07: Measurement range and sensitivity configuration, vibration range 0-2mm peak-to-peak, standard sensitivity 7.87V/mm, matching mainstream unit vibration monitoring requirements.

03: Frequency response specification, effective frequency band 1-800Hz, covering low-speed to medium-high-speed rotating equipment, capable of collecting rotor fundamental frequency, multiple frequency, etc., fault characteristic signals.

00: Filtering and signal processing configuration, standard digital filtering mode, no special customized filtering algorithm, factory default parameters are suitable for general conditions.

02: Analog output configuration, four channels share two isolated negative voltage analog outputs, output signal range -1VDC to -17VDC, can be connected to DCS, PLC, etc., control systems.

03: Relay alarm output configuration, each channel is independently equipped with warning and danger two-level alarm contacts, overall integrated multi-channel passive dry contacts, supports group alarm logic settings.

48: Communication and address configuration, local communication address and baud rate parameters of the module, supports system bus communication, can be connected to the upper-level status monitoring software to achieve data upload.

02: Display and operation configuration, front panel equipped with status indicator lights and simple operation buttons, supports local viewing of running status, alarm information, and basic parameter configuration.

00: Safety barrier configuration, no built-in intrinsically safe safety barrier, can only be used in non-flammable and non-explosive ordinary industrial areas.

03: Environment and hardware version, industrial wide-temperature version, standard hardware architecture, shock-resistant, anti-interference design, suitable for complex on-site conditions.

01: Electromagnetic compatibility and certification, has CE electromagnetic compatibility certification, meets industrial site EMC anti-interference requirements.

00: Additional function configuration, no special customized functions, no redundant design, no external expansion interface, standard factory configuration. Multi-level alarm management, each channel can independently set two sets of alarm and danger threshold values. The alarm delay can be manually set to avoid false actions caused by instantaneous signal fluctuations. The alarm status is synchronously displayed through the panel indicator lights.

Standardized signal output, provides isolated analog signals for remote data acquisition. Multiple relays with passive contacts can directly be connected to the unit's safety interlock circuit to achieve functions such as over-limit shutdown and sound and light alarm.

Local and remote dual configuration. Basic parameter settings can be completed through panel buttons, and the range, threshold, channel functions, and communication parameters can be remotely configured through the accompanying configuration software.

Overall electrical isolation design. Input, output, and power supply are isolated from each other. Combined with an internal electromagnetic shielding structure, it can resist electromagnetic interference generated by frequency converters, high-power motors, and high-voltage equipment, ensuring long-term stable signals.

IV. Technical Parameters

(1) Measurement Parameters

The number of channels is four completely independent input channels; the standard vibration measurement range is 0~2mm peak-to-peak, with a sensitivity of 7.87V/mm; the displacement measurement range is adaptively configured according to the configuration, matching an 8mm eddy current probe with a linear range of 0.25mm~2.3mm. The frequency response range is 1~800Hz, meeting the requirements of most industrial rotating equipment monitoring. The overall measurement accuracy is no more than ±0.5% of the full scale, with a minimum resolution of 0.01mm. The alarm delay range can be programmed and set within 0~10 seconds, with a default delay of 3 seconds.

(2) Electrical Parameters

The module's working power supply is -24VDC, with a voltage allowable fluctuation range of ±10%, and the maximum power consumption of the entire machine is no more than 3W. The input circuit is compatible with the entire series of 8mm eddy current probes of the 3300 XL by Benelli and the accompanying preamplifiers and extension cables. The input impedance matches the system standard. The analog output is isolated -1~-17VDC, with stable output impedance and a linear error less than ±0.2% of the full scale. The relay contacts are passive dry contacts, with a single-channel capacity of 250VAC/3A, and can directly drive the alarm circuit and interlock circuit. The module supports system bus communication and can achieve multi-module networking and centralized data upload.

(3) Environmental and Mechanical Parameters

The working temperature range is -40℃ to +70℃, the storage temperature range is -40℃ to +85℃; the working relative humidity is 0% to 95%, with no condensation inside the environment. It adopts the standard 3300 series rack slot installation method, supports hot swapping, and can complete module replacement and maintenance without stopping the machine. The enclosure is made of metal panels combined with flame-retardant engineering plastics, with characteristics of shock resistance, corrosion resistance, and oil resistance. The module's protection level is IP20, suitable for installation in the control cabinet.

(4) Certification and Usage Specifications

The product has CE electromagnetic compatibility certification, meeting the requirements for industrial electromagnetic environment use; strictly follows the API 670 rotating machinery monitoring standard. This model has no explosion-proof structure and no built-in safety barrier, and is prohibited from being installed and used in flammable and explosive hazardous areas.

V. Structural Design

The module adopts a standard rack-mounted modular structure, divided into a front panel, main circuit board, and back panel wiring terminals. The front panel integrates power normal, channel normal, warning, danger, bypass, etc. status indicator lights and operation buttons, allowing for intuitive viewing of the module's operating status and alarm information, and supporting local simple parameter settings. The main circuit board adopts a four-channel completely independent circuit board design, with no signal interference between channels, and each channel is equipped with signal conditioning, linearization, fault detection, and alarm comparison units. The circuit layout is compact and reliable. The back panel is divided into four sections for probe input terminals, analog output terminals, relay alarm terminals, power terminals, and communication interfaces, with clear terminal divisions and neat wiring, facilitating on-site wiring, troubleshooting, and maintenance. The module supports hot-swapping functionality. It can be disassembled and assembled independently without power interruption to the system rack, thereby reducing the impact of equipment maintenance on the operation of the unit.

VI. System Compatibility

In terms of hardware, it can fully match the standard rack, system power module, and system monitoring module of the Benet 3300 series. All functional modules of the same series can be installed and used in a mixed manner. It is also compatible with 3300 XL series 8mm eddy current probes, extension cables, and preamplifiers. Components of the same specification can be directly interchanged without the need for secondary calibration. Analog output signals can be connected to various brands of DCS, PLC, and data acquisition devices. Relay contacts can be adapted for on-site sound and light alarms and unit interlock protection circuits. In terms of software, it is compatible with Benet's accompanying configuration software and System 1 equipment status monitoring software. It can achieve remote parameter configuration, real-time data display, trend analysis, fault record storage and query. The module supports system bus networking and can work collaboratively with other monitoring modules within the rack to form a complete unit status monitoring and protection system.

VII. Typical Application Scenarios

In the power industry, it is used for comprehensive vibration and axial displacement monitoring of steam turbines, gas turbines, generator sets, large feedwater pumps in thermal power plants, ensuring the safe and stable operation of the main unit. In the petrochemical industry, it is applied to centrifugal compressors, process turbines, large process pumps, etc., for online status monitoring and over-limit protection, and is only applicable in non-explosion-proof production areas. In the metallurgical industry, it can be equipped with blast furnace fans, large drive motors, rolling mill transmission equipment, etc., to monitor the vibration and position of the equipment, and predict mechanical failures in advance. It is also applicable to various large rotating machinery in general industrial fields such as cement and papermaking, for preventive maintenance and safety interlock protection.

VIII. Installation and Maintenance Requirements

(1) Installation Specifications

Insert the module smoothly into the vacant slot of the 3300 series rack, ensure that the backplane connector is fully in contact, and tighten the panel fixing screws. According to the channel definition, connect the signal cables of each eddy current probe and preamplifier to the corresponding input terminals. The wiring should be firm without loosening. Connect the analog output lines to the control system, and connect the relay alarm contacts according to the design drawings to the alarm or interlock circuits. After confirming that the rack power supply is normal, power on. Through local buttons or upper-level configuration software, configure the monitoring function, range, alarm threshold, and alarm delay parameters of each channel according to the requirements of the on-site equipment. After parameter setting, save and take effect. The installation of probes strictly follows the standards. The static installation gap of the 8mm system is set to 1.27mm. The probe should be perpendicular to the surface of the measured shaft to avoid contact with the shaft body.

(2) Daily Maintenance

During the daily inspection stage, regularly check the status of the panel indicator lights to confirm that the module and each channel are operating normally. Check for any looseness, oxidation, or overheating at all connection terminals. Conduct precision calibration work annually using a standard gap device to verify the measurement accuracy of vibration and displacement. Ensure that the measurement data meets the standard requirements. Regularly clean the surface of the module and the dust in the rack slots to ensure good ventilation and heat dissipation of the module, and avoid dust-induced poor heat dissipation or short circuit faults. When replacing spare parts, only the original Benet modules, probes, cables, and supporting accessories of the same model can be used. Non-original accessories will cause measurement deviations and circuit faults.

IX. Usage Precautions

This module has no explosion-proof capability. It is strictly prohibited to install and use it in flammable and explosive, or areas with combustible gas dust. It must be used in conjunction with the 3300 XL 8mm standard eddy current sensing system. It is not allowed to mix use of other specifications of probes. Otherwise, there will be mismatch in range and sensitivity, and measurement failure. It is forbidden to disassemble the module, modify the internal circuitry, or change the factory-calibrated cable length at will. Illegal operations will result in equipment damage and loss of warranty rights. When conducting wiring, maintenance, and module replacement operations, it is essential to cut off the power supply of the rack to prevent short circuits and electric shock accidents. The channel functions, alarm thresholds, etc. must be set strictly in accordance with the process requirements of the unit. Improper parameter settings may cause protection failure or frequent false alarms. The module installation position should be far away from strong electromagnetic interference sources such as large power frequency converters, transformers, and high-voltage cabinets on-site, to reduce the influence of external interference on the measurement signals.