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

I. Product Overview

The Bentley 3300/95 is the core four-channel multi-functional monitoring module of the Bently Nevada 3300 series TSI (Turbo Generator Instrumentation) system under Baker Hughes. This model is a standard industrial customized version, with the "XX" at the end representing the factory customization reserved position (such as special calibration, coating, marking or adaptation to a specific rack version). The main function is exactly the same as the standard model. The module is specifically designed for key rotating machinery in industries such as power, petrochemicals, and metallurgy, allowing flexible configuration for monitoring parameters such as radial vibration, axial displacement, shaft eccentricity, and differential expansion, providing high-precision online monitoring, fault warning, trend analysis, and safety interlock protection. It complies with API 670 Fourth Edition standards and is suitable for ordinary industrial areas (non-explosion-proof).

II. Model Code Interpretation (3300/95-01-07-03-00-02-03-48-02-00-01-01-XX)

3300: Bentley classic 3300 modular TSI system, 19-inch rack installation, supports hot swapping, multi-module expansion, and centralized power supply;

95: Function code, a four-channel general-purpose monitoring module, 4 independent inputs, configurable for multiple parameter monitoring;

01: Input type, compatible with the 3300 XL 8mm eddy current probe system (standard configuration);

07: Range and sensitivity, vibration range 0-2mm peak-to-peak, sensitivity 7.87V/mm;

03: Frequency response, 1-800Hz (-3dB), covering low-speed to medium-high speed units (60-48,000 CPM);

00: Filtering configuration, standard digital filtering, no special customized algorithm;

02: Analog output, 2 isolated -1~-17VDC, compatible with DCS/PLC;

03: Relay output, each channel has 2 levels of alarm (warning + danger), a total of 8 passive dry contacts (250VAC/3A);

48: Communication address / baud rate, module bus communication parameters, supports RS485/Modbus;

02: Display and operation, front panel LED status lights + buttons, supports local configuration and status viewing;

00: Safety barrier configuration, no built-in safety barrier, only applicable to non-explosion-proof areas;

01: Environmental grade, industrial wide temperature (-40℃~+70℃), shock resistance and interference resistance;

01: Certification, CE electromagnetic compatibility certification, complies with industrial EMC standards;

XX: Custom reserved position, representing factory special customization (such as calibration deviation, dedicated coating, serial number binding, rack adaptation fine-tuning, etc.), does not affect core functions and interchangeability.

III. Core Functions

Four-channel independent programmable monitoring: 4 completely independent inputs, each channel can be configured as radial vibration (peak-to-peak / effective value), axial displacement, shaft eccentricity, and differential expansion, a single module can achieve synchronous monitoring of multiple parameters, reducing rack occupation;

High-precision measurement and wide frequency response: compatible with the 3300 XL 8mm eddy current probe, linear error ≤ ±0.5% FS, frequency response 1-800Hz, capturing fault characteristics such as rotor imbalance, misalignment, and rubbing. Intelligent probe fault self-check (OK circuit): Real-time monitoring of breaks, short circuits, signal deviations, etc. in the probe, extension cable, and preamplifier. Precisely distinguishes between real mechanical faults and sensor circuit faults, reducing the risk of false alarms / false interlocks;

Multi-level alarms and flexible interlocks: Each channel independently sets two thresholds of ** warning (ALERT) and danger (DANGER)**. Alarm delay can be programmed from 0 to 10 seconds (default 3 seconds); 8 relay contacts can be customized logic and directly connected to the unit interlock circuit;

Dual configuration and data upload: Supports local key configuration (basic parameters) and remote software configuration (range, threshold, communication parameters, etc.); Compatible with System 1 software, realizes real-time data, trend analysis, fault recording and report generation;

Strong anti-interference and high reliability: Input / output / power triple electrical isolation (2500Vrms), built-in electromagnetic shielding layer, resists EMI/RFI interference from frequency converters and high-voltage equipment; Wide temperature design suitable for harsh conditions, metal panel + flame-retardant shell shock-resistant, corrosion-resistant.

IV. Technical Parameters

(1) Measurement Parameters

Channels: 4 independent (CH1~CH4);

Vibration range: 0~2mm peak-to-peak (configurable RMS value);

Displacement / differential expansion range: 0~5mm (compatible with 8mm probe linear range 0.25~2.3mm);

Sensitivity: 7.87V/mm, linear error ≤ ±0.5% FS;

Frequency response: 1~800Hz (-3dB);

Accuracy: Vibration ±0.5% FS, displacement ±1% FS;

Resolution: 0.01mm;

Alarm delay: 0~10 seconds programmable.

(2) Electrical Parameters

Power supply: -24VDC (±10%), power consumption ≤ 3W;

Probe input: compatible with 3300 XL 8mm eddy current probe / preamplifier, input impedance 10kΩ;

Analog output: 2 isolated -1~-17VDC, output impedance 100Ω, linear error ≤ ±0.2% FS;

Relay output: 8 passive dry contacts (each channel 2 contacts), 250VAC/3A;

Communication: RS485/Modbus, supports bus networking;

Isolation: 2500Vrms isolation between input / output / power.

(3) Environmental and Mechanical Parameters

Operating temperature: -40℃~+70℃;

Storage temperature: -40℃~+85℃;

Relative humidity: 0%~95% (no condensation);

Installation: 3300 standard 19-inch rack, supports hot swapping;

Size: approximately 220mm (depth) × 120mm (width) × 83mm (height);

Weight: approximately 1.3kg;

Protection class: IP20 (in the control cabinet).

(V) Certification and Compliance

Electromagnetic compatibility: CE (EN 61000-6-2/4);

Industry standards: API 670 Fourth Edition;

Explosion-proof: None (for general use in ordinary areas);

Quality system: ISO 9001.

V. Structural Design

(1) Rack-mounted modular architecture

Compatible with 3300 series 4-14 slot standard rack, supports hot swapping, module replacement does not require shutdown. Front panel integrates OK, ALERT, DANGER, BYPASS high-brightness LED lights and operation keys, can view status, alarms and basic configuration on-site; Back panel is clearly divided, contains 4 probe inputs, 2 analog output, 8 relay contacts, power and communication interfaces, neat wiring, convenient for debugging and maintenance.

(2) Four-channel independent circuit Four-channel signals adopt completely independent signal conditioning, linearization, filtering, alarm comparison, and OK monitoring units. There is no crosstalk between channels, ensuring high stability and low failure rate, and guaranteeing the accuracy of multi-parameter synchronous measurement.

(III) Customized Reserved Design

The "XX" reserved position at the end supports special calibration, coating, marking or rack adaptation fine-tuning by the factory. Without changing the core hardware and interface of the module, it can be directly interchanged with standard modules of the same series, without affecting system compatibility.

VI. System Compatibility

(1) Hardware Compatibility

Compatible with 3300 rack (3300/05), power supply (3300/12/13), system monitoring module (3300/03);

Compatible with 3300 XL 8mm eddy current probe, extension cable, preamplifier. Components can be interchanged without secondary calibration, and can be directly replaced with standard modules of the same series without affecting system compatibility;

Analog output compatible with mainstream DCS/PLC such as Siemens, Honeywell, and Yokogawa;

Relay contacts compatible with sound and light alarms, unit interlock circuits;

Communication interface supports networking with upper computer and data acquisition device.

(2) Software Compatibility

Support System 1 status monitoring software to achieve data acquisition, trend analysis, fault diagnosis, historical storage and report generation;

Compatible with 3300 series configuration software for remote parameter configuration, probe calibration, and alarm log viewing;

Local buttons can complete basic configuration without software deployment.

VII. Typical Application Scenarios

Power Industry: Vibration + displacement + differential expansion monitoring for thermal power / nuclear power turbine, gas turbine, generator, feed pump, ensuring the safety of the main equipment;

Petrochemical Industry: Vibration and shaft position monitoring for centrifugal compressors, process turbines, large pump sets (non-explosion-proof area);

Metallurgical Industry: Vibration and eccentricity monitoring for blast furnace fans, large motors, rolling mill drive equipment, preventing faults;

General Industry: Online monitoring, preventive maintenance and safety interlock for key rotating equipment in cement, papermaking, pharmaceuticals and other industries.

VIII. Installation and Maintenance

(1) Installation Key Points

Rack installation: Insert into the vacant slot of the 3300 rack, tighten the panel screws, ensure good contact of the backplane connector;

Probe installation: 3300 XL 8mm probe installed vertically, set the static gap to 1.27mm, fix the cable firmly, avoid vibration wear;

Wiring standard: Connect the probe cable to CH1~CH4, the analog output to DCS/PLC, the relay contacts to the alarm/interlock circuit, the communication port to the upper computer;

Power-on configuration: Connect the -24VDC power supply, set the channel functions, range, alarm threshold, delay through local buttons or software, save and take effect.

(2) Daily Maintenance

Inspection: Daily check the LED status of the panel, the tightness of the connection terminals, the heat dissipation of the module;

Calibration: Calibrate the accuracy annually with a standard gap block, ensuring the error ≤ ±0.5% FS;

Cleaning: Clean the dust on the panel and rack quarterly to ensure good heat dissipation;

Spares: Only use the original Bently modules, probes, and cables to avoid measurement deviation.

IX. Usage Precautions

Non-explosion-proof use: No explosion-proof design,严禁 use in flammable and explosive dangerous areas；

Probe matching： Must be matched with the 3300 XL 8mm eddy current probe system， and 5mm/11mm probes are not allowed to be mixed；

Gap standard： The static gap of the probe must be installed strictly at 1.27mm， too close is prone to collision and wear， too far results in weak signal；

Custom reserved position： "XX" is a factory-customized mark， cannot be modified or disassembled by oneself， otherwise the warranty will be lost；

Prohibition of private modification： Do not disassemble the module， modify the circuit， or change the cable length to avoid module failure；

Power-off operation： When wiring， inspecting， replacing the module， the power supply of the rack must be cut off to prevent short circuit / electric shock.