Bently 3305/25-02

Description

3. Technical Specifications

Input Parameters

• Input Type: Accepts eddy-current proximity probe signals from Bently 3300 Series probes; supports up to 8 independent input channels (configurable for radial vibration, axial displacement, or shaft position measurements).
• Input Impedance: 50 ohms (precision-matched to 3300 Series probe/extension cable impedance), eliminating signal reflection and minimizing transmission loss.
• Input Voltage Range: -24 V DC to +24 V DC (peak), fully compatible with the output range of 3300 Series proximity probes.
• Frequency Response: 0.1 Hz to 10 kHz per channel, enabling accurate capture of low-frequency shaft position changes (e.g., axial drift) and high-frequency vibration harmonics (e.g., bearing wear signatures).
• Input Resolution: 0.001 mm for displacement measurements, 0.01 μm for vibration amplitude measurements—ensuring ultra-precise detection of subtle machinery anomalies.

Output Parameters

• Analog Outputs: 8 independent 4-20 mA DC current loops (one per channel), each configurable to map to user-defined measurement ranges (e.g., 0-500 μm for radial vibration, 0-20 mm for axial displacement). Output accuracy: ±0.05% of full scale (at 25°C).
• Digital Outputs: 8 Form C (SPDT) relay outputs (one per channel), programmable for alarm (warning) or trip (emergency shutdown) functions. Relay rating: 3 A @ 250 V AC / 30 V DC; contact life: 200,000 operations (at rated load).
• Communication Interface: Dual ports—RS-485 (Modbus RTU) and 10/100 Ethernet (Modbus TCP/IP)—for high-speed data transmission. Baud rate for RS-485: 9600-115200 bps; Ethernet supports full-duplex operation and remote configuration.

Power Requirements

• Power Input: 24 V DC ±15% (nominal); optional 110/220 V AC ±10% (with integrated, isolated power supply module).
• Power Consumption: Maximum 30 W (all channels active, relays energized, display backlight on).
• Power Protection: Multi-stage protection against overvoltage (up to 40 V DC), reverse polarity, and voltage surges (compliant with IEC 61000-4-5), ensuring resilience in unstable industrial power grids.

Physical & Environmental Parameters

• Dimensions: 190 mm (width) × 132 mm (height) × 230 mm (depth); designed for 19-inch rack mounting (3U height) to optimize control cabinet space.
• Operating Temperature Range: -40°C to +75°C, suitable for extreme environments (e.g., desert power plants, arctic oil refineries, high-temperature process facilities).
• Humidity Resistance: 5% to 95% relative humidity (non-condensing), with enhanced moisture sealing to prevent corrosion in damp settings (e.g., offshore platforms, pulp mills).
• Shock & Vibration Resistance: Compliant with IEC 60068-2-27 (100 g shock, 6 ms duration) and IEC 60068-2-6 (10 g acceleration, 10-2000 Hz), ensuring stability under intense mechanical stress from rotating machinery.
• Ingress Protection (IP) Rating: IP30 (front panel) for dust resistance; IP65 (rear connectors, when mated) for moisture and dust protection in harsh industrial atmospheres.

Compliance & Certifications

• Electrical Safety: UL 508 (USA), CSA C22.2 No. 14 (Canada), IEC 61010-1 (International).
• Hazardous Locations: ATEX Zone 2 (II 3G Ex nA IIC T5 Ga) and IECEx Zone 2 (Ex nA IIC T5 Ga), approved for use in environments with flammable gases/vapors (e.g., refineries, chemical plants).
• EMC Compliance: EN 61326-1 (industrial environments) and FCC Part 15 Class A, minimizing electromagnetic emissions and enhancing immunity to EMI/RFI from motors, VFDs, or power cables.
• Environmental Compliance: RoHS 2.0 (EU Directive 2011/65/EU) and REACH (EU Regulation 1907/2006), free of restricted substances and hazardous materials.

4. Functional Features

• Specialized Vibration & Position Monitoring: Optimized exclusively for vibration (radial, axial) and shaft position measurements, delivering superior precision compared to general-purpose monitors. Its 0.001 mm displacement resolution and 0.01 μm vibration resolution enable detection of ultra-subtle anomalies—such as 0.005 mm shaft drift or 0.1 Hz vibration frequency shifts—that signal early-stage issues like bearing fatigue, rotor imbalance, or shaft misalignment.
• 8-Channel Simultaneous Monitoring: Supports up to 8 independent input channels, enabling simultaneous tracking of multiple parameters across diverse machinery (e.g., 4 radial vibration points on a turbine, 2 axial displacement points on a compressor, 2 shaft position points on a pump). This eliminates the need for multiple single-channel modules, reducing rack space usage by 60% and simplifying wiring and maintenance.
• High-Accuracy Signal Processing: Delivers analog output accuracy of ±0.05% of full scale and minimal temperature drift (≤0.01% of full scale per °C), ensuring raw probe signals are converted into highly reliable data. This precision is critical for compliance with strict industrial standards (e.g., ISO 10816 for machinery vibration) and for validating the health of high-value equipment like gas turbines or centrifugal compressors.
• Programmable Alarm & Trip Logic: Each channel’s Form C relay (3 A rating) supports dual-stage threshold configuration: “warning” (alarm) for early anomaly detection and “critical” (trip) for emergency shutdowns. Relays include programmable time delays (0-60 seconds) to filter transient spikes (e.g., temporary vibration during machinery start-up) and avoid false shutdowns. The module stores a 300-event alarm log (with timestamps, channel IDs, and parameter values) for post-incident root-cause analysis.
• Dual-Protocol Communication & Remote Management: RS-485 (Modbus RTU) and Ethernet (Modbus TCP/IP) ports enable seamless integration with DCS, SCADA, or Bently’s System 1 software. Ethernet supports remote configuration (e.g., adjusting measurement ranges or alarm thresholds), real-time data streaming (up to 10 Hz per channel), and historical data logging (up to 3 years of trend data at 1-minute intervals). This facilitates predictive maintenance strategies, such as trend analysis of vibration data to schedule bearing replacements before failures occur.
• Rugged Environmental Resilience: Operates reliably in temperatures from -40°C to +75°C, humidity from 5% to 95% RH (non-condensing), and under extreme shock/vibration (100 g shock, 10 g acceleration). IP65-rated rear connectors (when mated) prevent moisture and dust ingress, making it suitable for harsh settings like offshore drilling platforms (saltwater exposure), steel mills (dust and heat), or mining sites (mechanical stress).
• User-Friendly Interface & Configuration: Features a 5.7-inch color TFT LCD (640×480 resolution) with high brightness (500 nits) and anti-glare coating for visibility in any lighting condition. The interface displays real-time parameter values (numeric + graphical trends), channel status (green = normal, yellow = alarm, red = trip), and fault codes. An industrial-grade membrane keypad (with tactile feedback) and jog dial enable intuitive navigation—even while wearing gloves, common in manufacturing or mining environments. Basic configuration can be completed on-site in minutes, with no external software required.
• Comprehensive Diagnostics: Integrates advanced self-diagnostics to monitor internal components (power supply, display, communication ports, relays) and external connections (probe cables, extension cables). Faults—such as open probe wires, shorted analog outputs, or Ethernet connection loss—trigger on-screen fault codes, LED alerts, and automated notifications via the communication port. This reduces troubleshooting time by up to 50% and minimizes unplanned downtime.

5. Application Scenarios

• Power Generation Industry (Turbines & Generators):
  • Deployed in coal-fired, natural gas, and nuclear power plants to monitor steam turbines, gas turbines, and generators. It tracks 8 channels of data—4 radial vibration points (to detect rotor imbalance), 2 axial displacement points (to prevent rotor rub), and 2 shaft position points (to ensure alignment with generators). The module’s high accuracy ensures compliance with NEMA SM 23 (turbine vibration standards), while its Ethernet port feeds real-time data to the plant’s DCS. Trip relays trigger emergency shutdowns if vibration exceeds 250 μm (turbine critical limit), preventing catastrophic failure and unplanned power outages.
• Oil & Gas Industry (Compressors & Pumps):
  • Used in offshore drilling platforms, onshore refineries, and pipeline compressor stations to monitor centrifugal compressors, reciprocating pumps, and gearboxes. It processes 8 channels of vibration and position data—6 for compressor vibration (to detect impeller wear or seal failure) and 2 for pump shaft position (to prevent cavitation). ATEX/IECEx T5 certification (higher temperature tolerance) makes it suitable for refinery process units where ambient temperatures exceed 60°C. The RS-485 port enables integration with SCADA systems, allowing remote monitoring of pipeline compressors and quick response to alarms (e.g., a sudden spike in vibration indicating liquid slugging).
• Petrochemical Industry (Reactors & Agitators):
  • Integrated into ethylene crackers, polymer reactors, and process pumps to monitor agitator vibration and reactor shaft position. It tracks 6 channels of agitator vibration (to detect impeller fouling or bearing wear) and 2 channels of reactor shaft axial displacement (to prevent contact with internal components). The module’s graphical trend display helps operators identify gradual changes—like a slow increase in agitator vibration that signals the need for cleaning—avoiding unplanned production shutdowns. Its moisture-resistant design ensures reliability in outdoor pump stations, where rain and humidity are common.
• Metallurgical Industry (Rolling Mills & Fans):
  • Applied in steel mills and aluminum smelters to monitor rolling mill drives, fan motors, and hydraulic pumps. It consolidates 8 channels of vibration data from rolling mill drives—critical for detecting gearbox wear or bearing failure that could disrupt steel production. The module’s shock resistance (100 g) withstands the intense mechanical stress from rolling operations, while its dust-resistant IP30 rating prevents steel dust accumulation. Alarm logs (300 events) enable maintenance teams to review past anomalies and optimize maintenance schedules, reducing downtime by up to 30%.
• Marine & Shipping Industry (Diesel Engines & Propellers):
  • Installed on LNG tankers, cargo ships, and offshore support vessels to monitor marine diesel engines, propeller shafts, and auxiliary pumps. It processes 4 channels of engine vibration, 2 channels of propeller shaft displacement, and 2 channels of pump vibration. Its wide temperature range (-40°C to +75°C) supports operation in arctic (LNG transport) and tropical (cargo shipping) waters, while its vibration resistance ensures reliability during rough seas. The Ethernet port allows crew to share data with onshore maintenance teams, enabling remote troubleshooting and predictive part replacement.
• Heavy Manufacturing (Machining Centers & Robots):
  • Used in automotive and aerospace component plants to monitor large machining centers, robotic arms, and conveyor systems. It tracks 8 channels of vibration data—6 from machining centers (to detect tool wear or spindle imbalance) and 2 from robotic arms (to ensure precision in assembly). The module’s ±0.05% accuracy ensures machining vibrations stay within tight tolerances (e.g., ≤50 μm) for aerospace component quality, while its compatibility with industrial IoT platforms enables integration into smart factory networks.