Product Overview

The 3300_50 is a high-precision, dual-channel tachometer monitor module designed for the Bently Nevada 3300 monitoring system. This module serves as a critical component in the protection of rotating machinery by providing continuous, real-time monitoring of shaft speed and acceleration. Engineered to accept input signals from either eddy current (proximity) probes or magnetic pickups, the 3300_50 module processes these signals to deliver accurate RPM (revolutions per minute) data. It is capable of driving alarm outputs and can also provide a keyphasor signal to other modules within the 3300 frame for advanced diagnostic analysis, such as unbalance and misalignment.

As a dual-channel device, the 3300_50 offers redundancy and versatility. Each channel can be independently configured to monitor different aspects of the machine’s rotational behavior, such as primary speed and acceleration, or to provide two independent keyphasor references. This flexibility allows the module to be used in a wide range of applications, from basic speed monitoring to complex machinery where phase information is critical for condition analysis. The module is designed to be easily installed into a 3300 chassis, such as the 3300_05 series, allowing for a scalable and modular approach to machine protection.

Main Features and Advantages

Dual-Channel Redundancy and Flexibility:

The 3300_50 features a dual-channel design that provides inherent redundancy. If one channel fails, the other can continue to provide speed data, ensuring that the machine remains protected. This is particularly important in critical applications where downtime is costly. Additionally, the dual channels allow for the simultaneous monitoring of two different speed parameters or the provision of two keyphasor signals to other modules, enhancing the diagnostic capabilities of the overall system.

High Accuracy and Resolution:

This module boasts a resolution of 0.1 RPM and a precision of ±20 RPM/min, making it suitable for both high-speed and low-speed applications. The ability to accurately measure low RPMs is a significant advantage, as many standard sensors struggle with signal clarity at slow speeds. This ensures that the machine is protected even during startup, shutdown, or idling periods, where speed monitoring is often just as critical as during full operation.