Description
Description
The Bently Nevada 3300/20 Axial Position Monitor is a dedicated rack-mounted module within the 3300 Series monitoring system. It is engineered to provide continuous, high-accuracy measurement of axial shaft displacement, commonly referred to as thrust position, in critical rotating equipment such as large compressors, steam turbines, and gas turbines. By monitoring the relative position between the shaft and the thrust bearing, the module serves as a primary defense against catastrophic mechanical failure caused by bearing wear or excessive axial movement.
Features
- Continuously monitors axial displacement with high-speed response times.
- Provides integrated Alert and Danger alarm logic for automated machine protection.
- Includes proportional 4-20 mA outputs for integration with external DCS or PLC systems.
- Front-panel LED indicators provide real-time status updates for OK, Bypass, Alert, and Danger conditions.
- Compatible with standard Bently Nevada proximity probe (Proximitor) sensor inputs.
Ordering Information
| Model Component |
Configuration |
| 3300/20 |
Axial Position Monitor |
| XX |
Measurement Range Option |
| 03 |
Agency Approval Option |
| 01 |
Proximity Probe Input |
| 00 |
Standard Relay Outputs |
| 00 |
Standard Input Barrier |
Technical Specifications
| Operating Temperature |
-30 degC to +65 degC |
| Typical Power Consumption |
2 W |
| Input Compatibility |
Proximitor sensor signals |
| Output Signals |
Dynamic position, 4-20 mA, Relay |
Installation Guidelines
- Ensure the 3300 rack is powered down before inserting or removing the monitor module to prevent electrical damage.
- Verify that all proximity probe wiring is correctly shielded and routed away from high-voltage AC cables to minimize EMI interference.
- Handle the module using proper ESD precautions to protect internal circuitry.
- Ensure the module is fully seated in the rack slot and that the front-panel locking mechanisms are engaged.
- Check that the configuration jumpers and software setpoints match the specific machine requirements before commissioning.
FAQ
What is the primary function of the 3300/20 module?
The 3300/20 is designed to monitor the axial position of a machine shaft relative to its thrust bearing, providing critical data to detect bearing wear or shaft drift before damage occurs.
Does this module include intrinsic safety barriers?
The 00 suffix in the barrier position indicates this configuration does not include internal intrinsic safety barriers. Ensure your installation environment requirements are met.
What type of sensors does this monitor accept?
This model is configured for use with standard Bently Nevada proximity probes (Proximitor sensors), which provide the necessary dynamic gap measurement.
