Bently Nevada 3300/55-03-14-14-14-00-00-07-00 Dual Velocity

Product Overview

The 3300/55-03-14-14-14-00-00-07-00 delivers dual-channel velocity monitoring for rotating machinery protection. This module accepts inputs from standard velocity transducers and provides proportional 4–20 mA outputs. Plant operators depend on this monitor for reliable casing vibration surveillance in motors and pumps. The unit includes independent alarm setpoints and relay outputs for each channel.

Key Specifications

Parameter	Specification
Model	3300/55-03-14-14-14-00-00-07-00
Number of Channels	2 (independent)
Sensor Type	Velocity transducer (geophone)
Input Sensitivity	100 mV/in/s
Frequency Response	2 Hz – 1 kHz
Measurement Range	0–1 in/s peak
Output Signal	4–20 mA per channel
Alarm Setpoints	4 total (Alert/Danger per channel)
Alarm Relays	4 SPDT (2 per channel)
Power Supply	+24 V DC from backplane
Current Consumption	95 mA (typical)
Operating Temperature	0°C to +50°C
Storage Temperature	-20°C to +70°C
Humidity Range	5% to 95% RH (non-condensing)
Dimensions	165 mm × 25 mm × 102 mm
Weight	0.28 kg
Front Panel Indicators	Channel OK, Alert, Danger
Diagnostic Features	Sensor fault detection

Dual-Channel Monitoring Capability

This monitor processes signals from two independent velocity transducers simultaneously. Each channel measures absolute casing vibration for comprehensive machine condition assessment. The frequency response spans from 2 Hz to 1 kHz, covering most industrial rotating equipment. Operators can configure each channel independently for specific measurement requirements. The module’s velocity measurement suits applications where casing vibration provides the most meaningful health data.

Sensor Input and Configuration

The 3300/55-03-14-14-14-00-00-07-00 accepts standard velocity transducers with 100 mV/in/s sensitivity. This configuration matches the most common velocity sensor type in industrial applications. The module also provides built-in sensor fault detection for open or shorted circuits. This diagnostic capability alerts maintenance personnel to sensor issues before they affect protection functions. Users can set measurement ranges and units using internal configuration switches.

Alarm and Relay Functionality

Four adjustable alarm setpoints (Alert and Danger per channel) protect monitored machinery effectively. Users can set these thresholds via front-panel potentiometers based on specific equipment requirements. Each channel provides two SPDT relay outputs for external alarm annunciation and shutdown functions. The relays activate when vibration levels exceed their configured setpoints. A bypass mode enables maintenance access without generating nuisance alarms.

Analog Outputs for System Integration

The module generates 4–20 mA analog outputs proportional to measured vibration velocity for each channel. These outputs interface directly with DCS, PLC, and data acquisition systems. The standard 4–20 mA signal range simplifies integration with existing plant infrastructure. Control room operators can use these outputs for continuous monitoring and trending. The module’s output scaling matches typical vibration monitoring requirements across industries.

Mechanical Design and Installation

This plug-in module measures 165 mm × 25 mm × 102 mm and weighs only 0.28 kg. It occupies a single slot in the standard 3300 series chassis. Front-panel LEDs provide visual status for power, channel health, Alert, and Danger conditions. A locking handle secures the module firmly within the chassis backplane. The compact design allows high-density configurations in monitoring racks.

Power Characteristics and Diagnostics

The monitor draws 95 mA from the +24 V DC backplane supply. This low current consumption minimizes heat generation and enhances long-term reliability. Built-in sensor fault detection identifies wiring issues or transducer failures promptly. Front-panel indicators display channel OK status for immediate fault recognition. These diagnostic features reduce troubleshooting time and improve system availability significantly.

Application and Operational Suitability

The 3300/55-03-14-14-14-00-00-07-00 suits motors, fans, blowers, and medium-speed pumps effectively. This monitor excels where casing velocity provides reliable failure indicators. The unit also serves applications in chemical processing, power generation, and manufacturing facilities. Its dual-channel design enables monitoring of two machine locations simultaneously. The module integrates seamlessly with Bently Nevada 3300 monitoring system racks.

Installation and Setup Guidance

Insert the module into an available slot in the 3300 chassis. Connect velocity transducer cables to the appropriate front-panel terminals. Adjust Alert and Danger setpoints using the front-panel potentiometers. Verify the 4–20 mA output corresponds to the applied vibration levels. Monitor front-panel LEDs to confirm normal channel operation and alarm status regularly.