Bently 330400-01-05

Description

3. Technical Specifications

Input Parameters

• Input Type: Accepts signals from Bently 3300 Series eddy-current proximity probes (unipolar or bipolar) and matching extension cables (e.g., 330192, 330195 series).
• Input Impedance: 50 ohms (matched to 3300 Series probe/extension cable impedance), ensuring minimal signal reflection and loss.
• Input Voltage Range: -24 V DC to +24 V DC (peak), compatible with the output range of 3300 Series proximity probes.
• Input Frequency Response: 0.1 Hz to 10 kHz, enabling accurate processing of both low-frequency shaft displacement signals and high-frequency vibration signals.

Output Parameters

• Analog Outputs: 2 independent 4-20 mA current loops (one per channel), each configurable to represent 0-100% of a user-defined measurement range (e.g., 0-500 μm for vibration, 0-10 mm for axial displacement). Output accuracy: ±0.1% of full scale (at 25°C).
• Digital Outputs: 2 Form C (SPDT) relay outputs per channel (total 4 relays), configurable for alarm (e.g., “High Vibration”) or trip (e.g., “Critical Displacement”) functions. Relay rating: 2 A @ 250 V AC / 30 V DC.
• Communication Interface: Optional RS-485 port (Modbus RTU protocol) for digital data transmission to SCADA/DCS systems or condition monitoring software (e.g., Bently Nevada’s System 1). Baud rate: 9600-115200 bps, parity: None/Even/Odd.

Power Requirements

• Power Input: 24 V DC ±10% (nominal), 110/220 V AC ±10% (optional, with external power supply).
• Power Consumption: Maximum 15 W (for dual-channel operation with all relays energized), ensuring low energy usage in control cabinets.

Physical & Environmental Parameters

• Dimensions: 140 mm (width) × 100 mm (height) × 220 mm (depth), designed for 19-inch rack mounting (2U height) to save cabinet space.
• Operating Temperature Range: -40°C to +70°C, suitable for both cold industrial facilities (e.g., refrigeration plants) and warm environments (e.g., power plant control rooms).
• Humidity Resistance: 5% to 95% relative humidity (non-condensing), preventing moisture-related damage in damp settings.
• Shock & Vibration Resistance: Compliant with IEC 60068-2-27 (50 g shock, 11 ms duration) and IEC 60068-2-6 (5 g acceleration, 10-2000 Hz), ensuring stability under mechanical stress.
• Ingress Protection (IP) Rating: IP20 (front panel), protecting against solid objects larger than 12.5 mm (e.g., fingers, small tools) and preventing accidental contact with internal components.

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 T4 Ga) and IECEx Zone 2 (Ex nA IIC T4 Ga), approved for use in environments with flammable gases/vapors.
• EMC compliance: EN 61326-1 (industrial environments), reducing electromagnetic emissions and enhancing immunity to external EMI/RFI.

4. Functional Features

• Dual-Channel Signal Processing: Supports simultaneous monitoring of two independent machinery parameters (e.g., radial vibration on two shafts, or vibration and axial displacement on one shaft) with dedicated input/output circuits per channel. This eliminates the need for multiple single-channel conditioners, saving rack space and reducing installation complexity.
• High Measurement Accuracy: Delivers analog output accuracy of ±0.1% of full scale, ensuring precise conversion of probe signals into actionable data. This accuracy is critical for detecting subtle machinery anomalies (e.g., 0.01 mm changes in shaft displacement) that indicate early-stage issues like bearing wear or rotor imbalance.
• Configurable Alarm & Trip Relays: Each channel includes two programmable Form C relays, allowing users to set custom alarm (warning) and trip (shutdown) thresholds based on machinery-specific operating limits. Relays feature latching or non-latching modes, and status LEDs on the front panel provide visual confirmation of relay activation.
• Built-In Diagnostics: Integrates self-diagnostic functions to monitor internal components (e.g., power supply, output circuits) and connected probes/cables. Faults (e.g., open probe cable, power loss) trigger visual indicators (LEDs) on the front panel and can be transmitted via the RS-485 interface, enabling quick troubleshooting and reducing downtime.
• Wide Environmental Adaptability: Operates reliably in extreme temperatures (-40°C to +70°C), high humidity (5-95% RH), and under shock/vibration—making it suitable for harsh industrial settings like offshore platforms, steel mills, and power plants.
• Easy Integration & Configuration: Front-panel pushbuttons and a digital display allow for on-site configuration of measurement ranges, alarm thresholds, and output settings—no external software is required for basic setup. For advanced configuration, Bently Nevada’s proprietary software (e.g., 3300 Series Configuration Tool) enables remote parameter adjustment and data logging via the RS-485 interface.
• Electrical Fault Protection: Includes overvoltage protection (up to 36 V DC on input/output terminals) and short-circuit protection for analog outputs, preventing damage to the conditioner or connected equipment from electrical faults (e.g., accidental shorting of output wires).

5. Application Scenarios

• Power Generation Industry:
  • Installed in coal-fired, natural gas, and nuclear power plants to process signals from proximity probes on steam turbines, gas turbines, and generators. It monitors radial vibration (to detect rotor misalignment) and axial displacement (to prevent turbine rotor rub), with trip relays triggering emergency shutdowns if parameters exceed critical limits. The conditioner’s compatibility with DCS systems ensures real-time data is shared with plant operators, supporting proactive maintenance.
• Oil & Gas Industry:
  • Deployed in offshore drilling platforms, onshore refineries, and pipeline compressor stations. It processes signals from probes on centrifugal compressors, reciprocating pumps, and gearboxes—monitoring vibration and shaft position in corrosive (saltwater exposure) and potentially explosive (Zone 2) environments. The RS-485 interface enables integration with SCADA systems, allowing remote monitoring of pipeline compressors.
• Petrochemical Industry:
  • Used in ethylene crackers, polymer reactors, and process pumps. It processes vibration signals from probes mounted on reactor agitators and pump shafts, with alarm relays alerting operators to abnormal vibration (indicative of bearing wear or impeller damage). The conditioner’s wide temperature range (-40°C to +70°C) ensures reliable operation in both outdoor pump stations and indoor reactor rooms.
• Metallurgical Industry:
  • Integrated into steel mills and aluminum smelters to monitor rolling mill drives, fan motors, and hydraulic pumps. It processes signals from probes tracking radial vibration (to detect gearbox wear) and axial displacement (to prevent pump rotor seizure). The built-in diagnostics help maintenance teams quickly identify issues like open probe cables, reducing downtime in high-production steel manufacturing.
• Marine & Shipping Industry:
  • Installed on cargo ships and offshore support vessels to monitor marine diesel engines, propeller shafts, and auxiliary pumps. It processes vibration signals from engine crankshaft probes and displacement signals from propeller shaft sensors, with trip relays shutting down engines if critical parameters are exceeded. The conditioner’s resistance to shock and vibration ensures performance during rough sea conditions.
• Heavy Manufacturing & Mining:
  • Applied in cement plants, mining crushers, and conveyor systems. It processes vibration signals from crusher shafts (to detect jaw wear) and displacement signals from conveyor motor bearings (to prevent overheating). The dual-channel design allows simultaneous monitoring of two conveyors, optimizing rack space in mining control rooms.