Bently 3500/50 286566-02 Speed Monitoring Module

Technical Specifications

• Input Channels: 2 channels per module (up to 4 channels with two modules installed).
• Input Signal Range:
  • Non-isolated I/O: -0.8 V to -21.0 V.
  • Isolated I/O: +5 V to -11 V.
• Minimum Shaft Speed:
  • Passive electromagnetic sensors: >200 RPM (3.3 Hz).
  • Active proximity sensors: No minimum speed restriction.
• Auto Threshold: Minimum trigger signal amplitude of 2 V peak-to-peak at frequencies ≥120 RPM (2 Hz).
• Manual Threshold: Adjustable from 0.017 Hz (1 RPM) with a minimum input range of 0–20 Vdc and trigger amplitude of 500 mV peak-to-peak.
• Hysteresis: Adjustable from 0.2 to 2.5 V.
• Output: Buffered Keyphasor signals on front panel (coaxial connectors) and rear panel (Euro-style connectors).
• Power Supply: 24 V DC.
• Operating Temperature: -20°C to +50°C.
• Storage Temperature: -40°C to +70°C.
• Environmental Humidity: 5% to 95% relative humidity (non-condensing).
• Weight: 0.8 kg.
• Dimensions: 170 mm × 105 mm × 32 mm.

Functional Characteristics

• Dual-Channel Design: Accepts inputs from two proximity or electromagnetic sensors, converting them into digital Keyphasor signals.
• Redundancy Support: Two modules can be installed in a 3500 framework to accept four Keyphasor signals, providing backup in TMR (Triple Modular Redundant) configurations.
• Peak Holding: Stores the highest speed, highest reverse speed, or reverse revolutions, with resettable peak values.
• Signal Isolation: Optional isolated I/O modules prevent interference with other systems.
• Field-Upgradable Firmware: Allows firmware updates without removing the module from the framework.
• LED Indicators:
  • OK LED: Indicates module health and detects faults.
  • TX/RX LED: Flashes during communication with the framework interface module (RIM).

Application Scenarios

• Power Generation: Monitors vibration and mechanical health in turbines, generators, and pumps.
• Oil and Gas: Protects compressors, expanders, and pumps in refineries and offshore platforms.
• Petrochemical: Safeguards critical machinery in chemical processing plants, including reactors and distillation columns.
• Industrial Manufacturing: Ensures reliable operation of fans, motors, and gearboxes in steel mills, paper mills, and automotive plants.
• Marine and Offshore: Monitors propulsion systems and auxiliary machinery on ships and drilling platforms.

Key Advantages

• High Reliability: Designed for continuous operation in harsh industrial environments with minimal maintenance requirements.
• Flexible Configuration: Supports single or dual-module setups to meet varying system demands.
• Enhanced Diagnostics: LED indicators and buffered outputs simplify troubleshooting and signal distribution.
• Global Compliance: Meets international safety and performance standards, including API 670, ATEX, and IECEx.
• Seamless Integration: Works with other 3500 series modules to provide a complete mechanical protection and monitoring solution.