Product Overview

The Bently Nevada 3500/50 (133388-02) is a precision Tachometer Module designed for accurate rotational speed monitoring in industrial machinery. Part of the Bently Nevada 3500 Series, this module provides real-time RPM data to protect turbines, compressors, pumps, and other critical rotating equipment.

Its robust industrial design ensures reliable operation in continuous, demanding environments, delivering accurate speed measurement for machinery protection and predictive maintenance programs.

Technical Specifications

Function and Working Principle

The 3500/50 Tachometer Module operates by measuring rotational speed signals from the machinery:

• Accepts input from speed sensors, magnetic pickups, or proximity probes
• Amplifies and filters signals for high-accuracy RPM measurement
• Converts raw signals into conditioned outputs compatible with monitoring and protection systems
• Provides real-time rotational speed feedback for operators and control systems
• Detects overspeed or abnormal speed conditions to prevent machinery damage

This module ensures reliable speed monitoring and contributes to safe machinery operation.

Role in Industrial Control Systems

Within the Bently Nevada 3500 system, the 3500/50 module:

• Monitors rotational speed for turbines, compressors, and pumps
• Provides early detection of overspeed conditions
• Supplies conditioned signals to protection relays and control systems
• Integrates with multiple input sensors efficiently
• Supports predictive maintenance by enabling early fault detection

It forms a core component of industrial machinery protection networks.

Industrial Applications

The 3500/50 (133388-02) module is commonly used in:

• Gas and steam turbine power plants
• Industrial compressors and pumps
• Oil & gas and petrochemical facilities
• Continuous process plants with rotating machinery
• Any high-speed industrial equipment requiring accurate RPM monitoring

Its industrial-grade construction guarantees reliable performance in demanding environments.

Installation and System Integration

Installation guidelines:

• Mounted in a Bently Nevada 3500 system rack
• Connected to speed sensors, magnetic pickups, or proximity probes
• Integrated with preamplifier, I/O, and protection modules
• Powered through the rack backplane
• Calibration required for accurate RPM measurement

Proper installation ensures reliable data acquisition and optimal system performance.

Compatible System Components

This module integrates with:

• 3500/50 Tachometer modules
• Preamplifier and I/O modules
• Magnetic pickups, proximity probes, and speed sensors
• Communication and relay modules
• 3500 Series rack chassis and backplane power supplies

These components together provide a complete machinery speed monitoring and protection solution.

Recommended Alternative Models

Key Advantages

• Accurate and real-time rotational speed monitoring
• Reliable signal amplification and conditioning
• Continuous operation in industrial environments
• Early detection of overspeed or abnormal RPM
• Simplifies integration with multiple sensor inputs
• Supports predictive maintenance and machinery protection
• Enhances operational safety and reliability
• Compact, rack-mounted design (0.91 kg)

Technical FAQs

What is the function of the 133388-02 module?
It measures rotational speed (RPM) of industrial machinery and provides conditioned signals to protection and monitoring systems.

Which sensors are compatible?
Proximity probes, magnetic pickups, or speed sensors installed on rotating machinery.

Where is it installed?
Mounted in a 3500 system rack alongside preamplifier and I/O modules.

Does it support predictive maintenance?
Yes, by providing real-time speed data, it helps detect abnormal conditions early.

Conclusion

The Bently Nevada 3500/50 (133388-02) Tachometer Module is a reliable, industrial-grade solution for real-time rotational speed monitoring. Its accurate signal processing, robust design, and seamless integration with 3500 series modules enhance operational safety, predictive maintenance, and machinery protection in industrial environments.