The Bently Nevada 3300/50 Tachometer Module is a rack-mounted monitoring unit engineered to measure shaft rotational speed and provide critical overspeed protection for rotating machinery such as turbines and compressors. This module processes signals from proximity probes or magnetic pickups, delivering conditioned outputs for integration into plant-wide monitoring and control systems.
Continuous monitoring of shaft rotational speed and phase reference.
Integrated alarm logic for Alert and Danger setpoints with relay actuation.
Front-panel LED indicators for system status, including OK, Bypass, Alert, and Danger.
Configurable signal conditioning for various probe sensitivities.
Technical Specifications
Model
3300/50-02-02-00-00
Brand
Bently Nevada
Series
3300
Operating Temperature
0 to 60 degC
Power Consumption
1.5 W (typical)
Input Compatibility
Proximity probes, magnetic pickups
Signal Accuracy
+/- 0.33% typical (+/- 1% max at 25 degC)
Current Output
+4 to +20 mA (+/- 0.7% accuracy)
Voltage Output
+1 to +5 VDC / 0 to -10 VDC (+/- 1.1% accuracy)
Installation Guidelines
Ensure the 3300 rack is powered down before inserting or removing the module to prevent electrical damage.
The module must be seated firmly in the designated rack slot to ensure proper backplane connection.
Use shielded cabling for all input signals to minimize electromagnetic interference (EMI).
Maintain proper grounding practices for the rack and associated transducers to ensure signal integrity.
Verify that the module configuration matches the specific transducer type and speed range required for the application.
FAQ
What is the primary function of the 3300/50 module?
It is designed to measure shaft rotational speed and provide reliable overspeed protection for critical rotating equipment by monitoring proximity probe or magnetic pickup inputs.
Can this module be used for phase reference?
Yes, the module is capable of measuring both shaft rotational speed and phase reference signals.
What do the LED indicators on the front panel represent?
The LEDs provide visual status for the OK (system health), Bypass (maintenance mode), Alert (warning threshold), and Danger (shutdown threshold) conditions.
