Product Overview

The 3300/25-03-15-15-00-00-01-00 is a sophisticated dual-channel accelerometer monitor developed by Bently Nevada for the 3300 series machinery protection system. This module is engineered to process signals from two independent accelerometers, converting vibration data into actionable engineering units. Its primary purpose is to provide early detection of high-frequency vibration issues, such as those associated with rolling element bearings and gear mesh excitement. By integrating this module into a standard 3300 rack, industrial operators can ensure continuous surveillance of critical rotating assets, utilizing its internal logic to trigger alarms or emergency shutdowns when vibration thresholds are exceeded.

Hardware Architecture and Physical Specifications

• Channel Count: Two independent accelerometer signal processing channels

• Transducer Compatibility: Supports standard 100 mV/g accelerometers

• Relay Configuration: Single-Pole, Double-Throw (SPDT) for standard alarm output

• Maximum Switched Voltage: 250 Vac or 125 Vdc

• Contact Current Capacity: Up to 5 A (resistive load)

• Power Consumption: Approximately 5.8 Watts under typical load

• Operational Temperature Range: -30°C to +65°C (-22°F to +150°F)

• Relative Humidity Tolerance: 95% non-condensing

• Module Weight: 0.95 kg (2.1 lbs)

• Physical Dimensions: 241 mm x 50 mm x 103 mm (9.5 in x 2.0 in x 4.0 in)

Primary Engineering Deployments

This accelerometer monitor is a staple in heavy industrial environments where high-frequency vibration monitoring is non-negotiable. Its precision makes it ideal for the following applications:

• Reciprocating Machinery: Detecting impact-related vibrations in piston-driven compressors and engines.

• Gearbox Monitoring: Identifying gear tooth wear and mesh frequencies in high-speed transmission units.

• Rolling Element Bearings: Specialized tracking of bearing degradation in motors and pumps before thermal failure occurs.

• Aero-derivative Gas Turbines: High-sensitivity vibration monitoring in high-temperature environments.

• Paper and Steel Mills: Continuous protection of large rolls and heavy-duty drivetrain components.

FAQ

Q: Does this module support Triple Modular Redundancy (TMR) configurations?

A: While the 3300/25 is a robust dual-channel monitor, TMR capabilities are typically reserved for the 3500 series (such as the 3500/34). This module utilizes SPDT relays for standard industrial reliability.

Q: What is the benefit of the -01-00 suffix in this specific model number?

A: These digits represent specific factory-set options regarding safety barriers and agency approvals. This configuration is optimized for standard rack installations with CSA/NRTL/C requirements.

Q: Can this monitor be used with proximity probes instead of accelerometers?

A: No, the 3300/25 is specifically designed to interface with accelerometers. For proximity probe applications, a 3300/15 or 3300/20 series monitor would be required.

Q: How does the monitor handle signal integration to velocity?

A: Depending on the specific option codes selected, the 3300/25 can be configured to provide outputs in either acceleration (g) or integrated velocity (mm/s or in/s) for broader diagnostic utility.

Q: Is this module hot-swappable within the 3300 rack?

A: While 3300 modules are built for durability, it is recommended to power down the specific slot or follow site-specific safety protocols before removal to prevent accidental alarm trips.