Bently Nevada 3300/55-03-04-14-14-00-00-04-00

3300 Series Two-Channel Velocity Monitoring Module

The 3300/55-03-04-14-14-00-00-04-00 delivers continuous velocity measurement for two independent transducer inputs. This monitor operates within the 3300 Series platform and supports dual-channel seismic sensing. It processes each signal separately and compares them against configurable alarm thresholds. The device then activates the appropriate relays when any channel crosses its setpoint.

Key Technical Specifications

Parameter	Specification
Model	3300/55-03-04-14-14-00-00-04-00
Series	3300 Series
Input Channels	Two independent velocity transducer channels
Power Supply	Requires +24 Vdc at 200 mA nominal
Output Signals	Two buffered transducer outputs plus relay contacts
Alarm Configuration	Includes two alarm relays and one danger relay
Frequency Response	Spans from 1.0 kHz to 15.0 kHz
Input Impedance	Provides 100 kΩ impedance per channel
Time Delay	Adjustable from 0.1 to 10.0 seconds
Operating Temperature	Functions from -20°C to +65°C
Storage Temperature	Withstands -40°C to +85°C
Dimensions	Measures 241.3 mm x 25.4 mm x 152.4 mm
Weight	Weighs approximately 1.3 kg
Mounting	Fits standard 19-inch rack enclosures
Termination	Uses pluggable screw terminal blocks
LED Indicators	Displays OK, ALERT, and DANGER per channel

Signal Processing and Alarm Logic

The monitor continuously evaluates each velocity input against its respective threshold levels. It then triggers the alarm relay when a signal exceeds the first setpoint. Subsequently, the danger relay activates if the signal reaches the critical limit. Each channel maintains independent operation, so a fault on one does not compromise the other. The device also provides a buffered output for external diagnostic equipment.

Installation and Configuration

Mount the 3300/55-03-04-14-14-00-00-04-00 securely within the 19-inch rack first. Next, connect the transducer cables to the appropriate input terminals. After that, apply +24 Vdc power and verify the OK LED illuminates. You can then adjust the alarm setpoints using the front-panel potentiometers. Subsequently, configure the time delay to prevent nuisance tripping during startup.

Reliability and Routine Maintenance

This module stores all configuration parameters in non-volatile memory. Therefore, a power cycle will not erase your programmed settings. We recommend you perform periodic calibration checks on both input channels. You should also inspect the terminal connections for any signs of wear or corrosion.