Product Overview

The 3300/50-02-01-00-00 is a high-precision velocity tracking module designed for the Bently Nevada 3300 monitoring rack. This single-channel tachometer is engineered to provide continuous oversight of rotational shaft speeds, offering critical data for machinery protection and process control. By converting pulse inputs from proximity probes or magnetic pickups into accurate engineering units, it allows operators to monitor RPM levels in real-time. This specific configuration (02) is optimized for high-speed applications, featuring a dedicated full-scale range and integrated alarm logic to detect overspeed or underspeed conditions before mechanical damage occurs.

Essential Hardware Architecture and Specs

• Measurement Range: 0 to 50,000 RPM (Option 02)

• Transducer Interface: Compatible with standard magnetic pickups or Proximitor sensors (Option 01)

• Alarm Output: Epoxy-sealed relays for robust industrial switching (Option 00)

• Certification: Standard commercial configuration without specific agency approvals (Option 00)

• Accuracy Standard: Within ±1 RPM for precise velocity tracking

• Output Signal: Proportional 4 to 20 mA analog loop for DCS/PLC integration

• Display Type: 4-digit high-visibility LCD located on the module faceplate

• Module Weight: 1.15 kg (2.54 lbs)

• Physical Footprint: 241 mm x 50 mm x 103 mm (9.50 in x 1.98 in x 4.05 in)

Primary Engineering Deployments

This rotational speed monitor is a vital safety component for high-speed industrial assets. Its implementation is a standard requirement for protecting equipment from centrifugal force failure and operational instability. Key environments include:

• Centrifugal Compressor Stations: Monitoring high-speed impellers to prevent surging and overspeed events.

• Gas Turbine Assemblies: Providing real-time RPM feedback during ignition, ramp-up, and peak load cycles.

• Turbo-Expanders: Ensuring rotational stability in cryogenic and gas processing applications.

• Industrial Gearboxes: Tracking speed ratios and identifying slip or mechanical coupling failures.

• Power Generation Units: Integrating with emergency trip systems to provide a secondary layer of overspeed protection.

FAQ

Q: What differentiates the "02" range option from the standard "01" version?

A: The Option 02 configuration provides an extended full-scale range up to 50,000 RPM, making it suitable for high-speed turbo-machinery, whereas the 01 option is generally limited to 9,999 RPM.

Q: Can this module be installed in a hazardous area?

A: This specific configuration (Option 00) does not include internal safety barriers or CSA/ATEX certifications. If the transducer is located in a hazardous zone, external zener barriers must be used.

Q: Does the 3300/50 support Peak Speed memory functions?

A: Yes, the module is capable of capturing and storing the highest RPM reached since the last reset, which is invaluable for post-event analysis after an overspeed trip.

Q: Is the 4-20 mA output signal isolated?

A: The module provides a standard proportional current signal for remote monitoring. However, users should verify their specific rack ground configuration to ensure signal integrity across long-distance cable runs to a DCS.

Q: How do I verify the alarm setpoints on the module?

A: Setpoints can be viewed and adjusted via the front panel user interface or through the rack's communication gateway, allowing for precise calibration of Alert and Danger thresholds.