
Product Overview
The Bently Nevada 3500/50M (133388-02) is an advanced Tachometer Module designed for high-precision rotational speed monitoring in industrial machinery. As part of the enhanced Bently Nevada 3500/50M Series, this module delivers improved performance, flexibility, and reliability compared to standard versions, making it ideal for critical machinery protection applications.
It provides real-time RPM monitoring and signal processing, ensuring safe and efficient operation of turbines, compressors, pumps, and other rotating equipment in demanding industrial environments.
Technical Specifications
| Parameter |
Details |
| Manufacturer |
Bently Nevada |
| Model |
3500/50M |
| Part Number |
133388-02 |
| Product Type |
Tachometer Module |
| Function |
Rotational speed (RPM) monitoring |
| Dimensions |
241.3 × 24.4 × 241.8 mm |
| Weight |
0.91 kg |
| Installation |
Rack-mounted (3500 system rack) |
| Power Supply |
Backplane-powered |
| Signal Input |
Magnetic pickups, proximity probes, speed sensors |
| Signal Output |
Conditioned tachometer signals to monitoring and protection systems |
| Application |
High-precision rotating machinery monitoring |
| Operating Environment |
Industrial-grade, continuous operation |
Function and Working Principle
The 3500/50M (133388-02) module is designed to accurately monitor rotational speed:
- Receives input from magnetic pickups or proximity probes
- Amplifies and filters signals to ensure precise RPM calculation
- Converts raw signals into stable, conditioned outputs
- Provides real-time speed data to monitoring and protection systems
- Detects overspeed and abnormal rotational conditions
Its enhanced processing capability ensures higher accuracy and reliability in complex applications.
Role in Industrial Control Systems
Within the Bently Nevada 3500 system, the 3500/50M module:
- Provides continuous rotational speed monitoring for critical equipment
- Enables early detection of overspeed and abnormal speed fluctuations
- Supplies accurate data for protection and shutdown systems
- Integrates seamlessly with multiple sensor inputs
- Supports predictive maintenance and reduces unexpected downtime
It is essential for maintaining operational safety and system efficiency.
Industrial Applications
The 3500/50M (133388-02) module is widely used in:
- Gas and steam turbine systems
- Industrial compressors and pumps
- Oil & gas and petrochemical plants
- High-speed rotating machinery monitoring
- Power generation and continuous process industries
Its robust design ensures reliable performance in harsh industrial environments.
Installation and System Integration
Installation requirements:
- Installed in a Bently Nevada 3500 system rack
- Connected to magnetic pickups or proximity probes
- Integrated with I/O modules and protection systems
- Powered via the rack backplane
- Requires calibration for accurate speed measurement
Proper installation ensures stable operation and accurate monitoring.
Compatible System Components
This module works with:
- 3500/50M I/O modules
- Magnetic pickup sensors and proximity probes
- Preamplifier modules
- Communication and relay modules
- 3500 Series rack chassis and power supplies
These components together create a complete machinery monitoring and protection system.
Recommended Alternative Models
| Model |
Type |
Key Feature |
Application |
| 133388-02 |
Tachometer Module |
Standard speed monitoring |
General machinery |
| 288062-02 |
Tachometer Module |
Enhanced reliability |
Industrial systems |
| 286566-02 |
Tachometer Module |
Stable RPM monitoring |
Turbines and compressors |
| 133442-01 |
I/O Module |
Signal interface |
Sensor integration |
| 3500/42M |
Monitoring Module |
Multi-parameter monitoring |
Rotating equipment |
Key Advantages
- High-precision real-time rotational speed monitoring
- Enhanced performance compared to standard modules
- Reliable signal amplification and conditioning
- Continuous operation in industrial environments
- Early detection of overspeed and abnormal conditions
- Seamless integration with multiple sensors
- Supports predictive maintenance strategies
- Compact rack-mounted design (0.91 kg)
Technical FAQs
What is the main function of the 3500/50M (133388-02)?
It monitors and measures the rotational speed (RPM) of industrial machinery.
What is the difference between 3500/50 and 3500/50M?
The 50M version provides enhanced performance, flexibility, and improved monitoring capabilities.
Which sensors are supported?
Magnetic pickups, proximity probes, and other speed sensors.
Where is it installed?
Installed in a 3500 system rack as part of a complete monitoring system.
Conclusion
The Bently Nevada 3500/50M (133388-02) Tachometer Module is a high-performance solution for accurate rotational speed monitoring in industrial environments. With enhanced functionality, robust design, and seamless integration into the 3500 series system, it provides reliable machinery protection, improves operational safety, and supports predictive maintenance strategies for critical equipment.