Bently Nevada 133388-02 3500/50 Tachometer Module Speed Monitoring

Description

Product Function Overview

• Bently Nevada 133388-02 is a 3500/50 Tachometer Module.
• It is a dual-channel module for speed and rotation monitoring.
• The module tracks shaft speed, acceleration, and direction.
• It works with proximity probes or magnetic pickups.
• The design supports accurate alarm-based condition monitoring.

Monitoring Logic Architecture

• Core Measurement Tasks
  • Shaft speed tracking
  • Rotor acceleration detection
  • Rotation direction identification
• Configurable Monitoring Modes
  • Speed monitoring with setpoint alarms
  • Speed monitoring with zero speed notice
  • Speed monitoring with acceleration alarms
  • Speed monitoring with reverse rotation alerts

Signal Input and Output Design

• Input Channels
  • Up to two transducer inputs
  • Voltage range from +10.0 V to -24.0 V
  • Supports Keyphasor signal conditioning
• Output Interfaces
  • Buffered transducer outputs
  • Recorder outputs from +4 to +20 mA
  • Conditioned Keyphasor signals to backplane

Measurement and Processing Performance

• Dual-channel processing for redundancy.
• Fast response for real-time speed change detection.
• Stable signal handling during run-up and coast-down.
• Peak hold function for maximum speed capture.
• Reverse rotation capture for fault analysis.

Electrical Characteristics

• Power consumption
  • Typical 5.8 watts
• Designed for continuous rack operation
• Low internal heat generation

Status Indication and Diagnostics

• Front panel LEDs
  • OK status indicator
  • TX and RX communication indicator
  • Bypass status indicator
• Clear visual feedback for system health

Environmental Operating Limits

• Operating temperature range
  • -30°C to +65°C
• Storage temperature range
  • -40°C to +85°C
• Humidity tolerance
  • Up to 95 percent non-condensing

Mechanical Profile

• Module dimensions
  • Height 241.3 mm
  • Width 24.4 mm
  • Depth 241.8 mm
• Module weight
  • 0.82 kg
• Slim design for dense 3500 racks

System Integration Notes

• Requires compatible firmware and software versions.
• Designed only for use within 3500 Monitoring Systems.
• Not intended for standalone overspeed protection.
• Internal and external termination types must not mix.

Key Value Advantages

• Accurate speed data for protection logic.
• Clear detection of abnormal rotation behavior.
• Supports advanced alarm strategies.
• Improves fault analysis after trips.
• Trusted design used in critical assets.

Package, Warranty, and Shipping

• Package includes one Tachometer Module.
• 12-month warranty from shipment date.
• Global delivery via FedEx, UPS, or DHL.

FAQ

• Is this module required for speed measurement in a 3500 rack?
  • Yes. It provides all speed and direction signals.
• Can it detect reverse rotation during shutdown?
  • Yes. Reverse rotation capture is supported.
• What should be checked before ordering?
  • Confirm firmware, software, and termination type.
• Is it suitable for run-up monitoring?
  • Yes. It tracks acceleration during startup.
• Does this replace an overspeed trip device?
  • No. It is for monitoring and alarming only.

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