Bently 3500/33-01-02 149986-01

Description

BENTLY 3500/33-01-02 149986-01 Speed and Keyphasor Monitoring Module

1. Product Description

• Dual-Channel Speed Measurement: Supports two independent speed sensor inputs (e.g., magnetic pickups, proximity probes) for redundant monitoring, ensuring accuracy within ±0.1% of reading.
• Keyphasor Signal Conditioning: Generates a reference pulse per shaft revolution for vibration phase analysis, critical for detecting misalignment, bearing faults, or gear mesh issues.
• Wide Sensor Compatibility: Works with BENTLY 3300 Series proximity probes, 3900 Series speed sensors, and third-party inductive sensors, adapting to diverse machinery setups.
• Real-Time Diagnostics: Monitors sensor health (e.g., open/short circuits) and signal quality, reducing false alarms by 40% compared to legacy systems.
• Industrial Hardening: Operates at -40°C to +85°C with 5g vibration resistance, ideal for extreme environments like offshore platforms or high-temperature refineries.

2. Technical Parameters

Parameter	Specification
Brand	BENTLY
Model	3500/33-01-02 149986-01
Module Type	Speed and Keyphasor Monitor (2-channel)
Input Channels	2 speed channels + 1 keyphasor channel
Sensor Types	Magnetic pickups (5–24 VAC), proximity probes (-20 VDC)
Speed Range	0–100,000 RPM (magnetic), 0–20,000 RPM (proximity)
Frequency Response	DC–10 kHz (speed), DC–5 kHz (keyphasor)
Output Signals	2x 4–20 mA (speed), 1x digital TTL (keyphasor), 2x relay contacts (alarm/trip)
Power Supply	24 VDC ±15% (from 3500 rack)
Power Consumption	<8 W
Operating Temperature	-40°C to +85°C (-40°F to +185°F)
Dimensions	17.78 mm (width) × 165.1 mm (height) × 233.68 mm (depth)
Compatibility	BENTLY 3500 System racks, 3300/3900 Series sensors
Certifications	CE, ISO 13849 PL d (machine safety), RoHS

BENTLY 3500/33-01-02 149986-01

3. Advantages and Features

• Precision and Redundancy:
  • Achieves ±0.1% speed measurement accuracy, critical for overspeed protection in turbines.
  • Dual-channel design with auto-failover reduces single-point failures, proven to cut downtime by 35% in gas compressor applications.
• Robust Signal Processing:
  • Advanced filtering eliminates noise from electromagnetic interference (EMI), ensuring clean keyphasor signals even in high-vibration environments.
  • Supports both rising and falling edge detection for flexible sensor alignment.
• Ease of Integration:
  • Plug-and-play compatibility with 3500 System software for drag-and-drop configuration, reducing commissioning time to <2 hours.
  • Hot-swappable design allows module replacement without system shutdown, essential for continuous operations.

4. Application Areas and Case Study

Application Areas:

• Energy: Steam turbines, gas generators, and wind turbine gearboxes.
• Oil & Gas: Centrifugal compressors, pump trains, and offshore drilling machinery.
• Manufacturing: High-speed motors, conveyor systems, and precision rotating equipment.

Case Study:

5. Competitive Comparison

• Superior System Integration: Native compatibility with the 3500 System’s unified software and hardware ecosystem, eliminating the need for third-party converters.
• Extreme Environment Performance: Operates 20°C hotter and 10°C colder than most competitors, making it suitable for arid desert plants or arctic LNG facilities.
• Enhanced Safety Compliance: Built to ISO 13849 PL d, providing higher safety integrity levels for critical protection loops compared to basic industrial modules.
  

  BENTLY 3500/33-01-02 149986-01

6. Selection Recommendations

• System Compatibility: Ensure your setup uses a BENTLY 3500 System rack and compatible sensors (e.g., 330104 proximity probe, 3901 speed sensor).
• Environmental Needs: Choose this model for sites with temperature fluctuations >50°C or high vibration (≥5g), where its rugged design excels.
• Redundancy Requirements: Opt for the dual-channel 3500/33-01-02 149986-01 for critical machinery; consider single-channel variants for non-critical applications to reduce costs.
• Speed Range: Verify the sensor type matches your machinery’s RPM (e.g., magnetic pickups for high-speed, proximity probes for low-speed with position tracking).

7. Precautions

• Installation:
  • Torque sensor cables to 1.5 N·m and route them separately from high-voltage lines to minimize EMI.
  • Align keyphasor probes at the manufacturer-recommended air gap (e.g., 1.5 mm) using calibrated feeler gauges.
• Calibration:
  • Perform annual speed calibration with a certified tachometer (e.g., Fluke 805) to maintain accuracy.
  • Use the 3500 System Configuration Software to validate sensor linearity and signal quality.
• Maintenance:
  • Inspect module LEDs quarterly to ensure power and communication status; replace backup batteries every 5 years to preserve settings.
  • Clean connectors with isopropyl alcohol to prevent corrosion in high-humidity environments.
• Safety:
  • De-energize the 3500 rack and follow lockout/tagout procedures before handling the module.
  • In hazardous areas, ensure installation complies with ATEX/IECEx standards using approved enclosures.