Product Overview

The 3300/20-12-01-01-00-00 is a specialized dual-channel monitoring module engineered to track axial shaft position within rotating industrial machinery. By utilizing proximity probe inputs, this device provides continuous oversight of thrust bearing clearances, ensuring that axial movement remains within safe operational limits. It serves as a critical defense mechanism against catastrophic internal contact or bearing failure by offering real-time data visualization and automated alarm triggering. This specific unit is configured with a metric scale and standard epoxy-sealed relays, making it a reliable choice for standard industrial environments requiring precise displacement monitoring.

Core Hardware Parameters

• Measurement Range: 1.0-0-1.0 mm (Option 12)

• Input Signal Compatibility: 3300 or 7200 Proximitor systems at 200 mV/mil (Option 01)

• Relay Configuration: Epoxy-sealed (Option 01)

• Approvals: CSA/NRTL/C (Option 01)

• Safety Barrier: None / External (Option 00)

• Display Accuracy: Within ±1.6% of full-scale range

• Vertical Faceplate Dimension: 83 mm (3.25 inches)

• Unit Weight: Approximately 1.05 kg (2.3 lbs)

• Module Dimensions: 241 mm x 50 mm x 103 mm (9.50 in x 1.98 in x 4.05 in)

Primary Engineering Applications

This monitor is vital for the protection of high-capital rotating assets where axial displacement can lead to immediate mechanical destruction. It is frequently implemented in the following scenarios:

• Steam and Gas Turbines: Monitoring rotor axial movement to protect thrust bearings and internal stages.

• Centrifugal Compressors: Managing thrust loads in high-pressure gas processing and transport.

• Power Generation Equipment: Serving as an integral part of the 3300 Rack system for plant-wide safety.

• Large Scale Pumping Stations: Tracking shaft stability in water treatment or petroleum transport.

• Industrial Blowers and Fans: Preventing housing contact during thermal expansion or load shifts.

FAQ

Q: What is the primary function of the "Dual" designation in this monitor?

A: The dual-channel design allows the module to monitor two independent thrust positions or provide redundant monitoring for a single shaft to increase system reliability.

Q: Can this unit be integrated into a non-Bently Nevada rack system?

A: This module is specifically designed for installation within a Bently Nevada 3300 Series Monitoring System rack and requires the standard 3300 backplane for power and signal routing.

Q: Is the 1.0-0-1.0 mm range fixed or adjustable?

A: The range is determined by the hardware configuration (Option 12). While fine calibration is possible, the full-scale range is set to the metric 1.0-0-1.0 mm specification at the factory.

Q: Does this model include internal safety barriers?

A: No, this specific configuration (Option 00) does not include internal safety barriers. If used in hazardous areas, external zener barriers or galvanic isolators must be employed.

Q: What is the difference between epoxy-sealed and hermetically-sealed relays?

A: Epoxy-sealed relays (Option 01) provide standard protection against dust and moisture for general industrial use, whereas hermetically-sealed relays offer an airtight seal for more corrosive or volatile atmospheres.