Bently Nevada 133388-02 | 3500/50 Tachometer Module

Overview:

• The 133388-02 3500/50 Tachometer Module monitors shaft speed, rotor acceleration, and rotor direction using input signals from proximity probes or magnetic pickups.
• It compares these measurements to user-defined alarm setpoints.
• The module generates alarms if any setpoints are violated.
• This module is highly flexible and configurable with four operational options to suit different monitoring needs.

Key Features

• Configurable Options:
  1. Speed Monitoring, Setpoint Alarming, and Speed Band Alarming.
  2. Speed Monitoring, Setpoint Alarming, and Zero Speed Notification.
  3. Speed Monitoring, Setpoint Alarming, and Rotor Acceleration Alarming.
  4. Speed Monitoring, Setpoint Alarming, and Reverse Rotation Notification.
• Keyphasor Signal Output: The module supplies conditioned Keyphasor® signals to the 3500 rack backplane, eliminating the need for a separate Keyphasor® module.
• Peak Hold Feature: The module stores the highest speed, highest reverse speed, or number of reverse rotations the machine has reached. The user can reset these values.

Application Note

The 3500/50 Tachometer Module is not designed for speed control or overspeed protection systems. It lacks the redundancy and speed needed for reliable operation in these applications. The analog outputs are only suitable for data logging or display, and speed alert setpoints are solely for annunciation. Magnetic pickups are not suitable for reverse rotation or zero speed options because of their low-speed performance limitations.

Specifications

• Inputs:
  • Signal: Accepts 1 to 2 transducer signals from proximity probes or magnetic pickups.
  • Input Signal Range: +10.0 V to -24.0 V (signals exceeding this range are limited internally).
  • Input Impedance: 20 kΩ (standard), 40 kΩ (TMR), 7.15 kΩ (Internal Barrier).
• Power Consumption: 5.8 watts (typical).
• Outputs:
  • Front Panel LEDs:
    • OK LED: Indicates normal operation.
    • TX/RX LED: Shows communication status.
    • Bypass LED: Indicates when the module is in Bypass Mode.
  • Buffered Transducer Outputs: Coaxial connectors, short-circuit and ESD protected.
  • Output Impedance: 550 Ω.
  • Transducer Power Supply: -24 Vdc, 40 mA maximum per channel.
  • Recorder Output: +4 to +20 mA, proportional to full-scale range (RPM or RPM/min).
  • Signal Conditioning: Supports 0.0039 to 255 events per revolution, with a maximum range of 99,999 RPM and a maximum input frequency of 20 kHz.
• Accuracy:
  • RPM Accuracy:
    • Less than 100 RPM = ±0.1 RPM,
    • 100 to 10,000 RPM = ±1 RPM,
    • 10,000 to 99,999 RPM = ±0.01% of true shaft speed.
  • RPM/Min Accuracy: ±20 RPM/min.
• Alarm Setpoints and Time Delays:
  • The user can adjust alarm setpoints between 0 and 100% of full scale for each measured value.
  • Alarm Time Delays:
    • Alarm 1: From 1 to 60 seconds (1-second intervals).
    • Alarm 2: From 1 to 60 seconds (0.1-second intervals).

Environmental Limits

• Operating Temperature:
  • With Internal/External Termination I/O Module: -30°C to +65°C (-22°F to +150°F).
  • With Internal Barrier I/O Module (Internal Termination): 0°C to +65°C (32°F to +150°F).
• Storage Temperature: -40°C to +85°C (-40°F to +185°F).
• Humidity: 95%, non-condensing.

Physical Dimensions

• Dimensions (Height x Width x Depth): 241.3 mm x 24.4 mm x 241.8 mm (9.50 in x 0.96 in x 9.52 in).
• Weight: 0.82 kg (1.8 lbs).

Documentation Manual

 

To access the full product details and technical specifications for the Bently Nevada 3500/50 Tachometer Module, please refer to the official datasheet by clicking the following link:

Download the GE Bently Nevada 3500/50 Datasheet

This datasheet contains all the essential information, including configuration options, installation instructions, and performance data to help you fully understand the module’s features and applications.

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