Bently Nevada 3300/55-03-04-16-00-00-05-02 Vibration Monitoring

This 3300/55-03-04-16-00-00-05-02 vibration monitoring module provides continuous surveillance of rotating machinery health. It processes signals from proximity probes and accelerometers for early fault detection. The unit integrates seamlessly into the Bently Nevada 3300 monitoring system.

Technical Specifications

Parameter	Specification
Model Number	3300/55-03-04-16-00-00-05-02
Product Type	Vibration Monitoring Module
Supply Voltage	24 V DC ±10%
Power Consumption	12 W (maximum)
Input Channels	4 x dual-configurable (proximity/accelerometer)
Input Type	–3 V to –24 V (proximity) / ±10 V (accelerometer)
Frequency Response	0.3 Hz to 15 kHz (±3 dB)
Resolution	14-bit (including sign)
Outputs	4 x 4–20 mA (isolated, configurable)
Alarm Relays	4 x Form C (SPDT, 2 A at 30 V DC)
Communication	1 x RS-485 (Modbus RTU)
Transducer Power	–24 V DC (proximity) / 4 mA (accelerometer)
Status Indicators	8 x LED (Power, 4 x OK, 4 x Alarm)
Mounting	Backplane rack
Dimensions (W x H x D)	26 mm x 223 mm x 175 mm
Weight	0.48 kg

Mechanical Design and Form Factor

This monitoring module follows the standard 3300 rack form factor for system integration. Its 26 mm width occupies a single slot in the chassis. The unit weighs 0.48 kilograms and features a robust multilayer PCB. The front panel includes all connectors and status indicators for easy access.

Power Supply and Electrical Characteristics

The device operates from a 24 V DC supply with a ±10 percent tolerance. It consumes a maximum of 12 watts during full operation. The module provides regulated –24 V DC for proximity probe excitation. It also supplies a constant 4 mA current for accelerometer sensors.

Sensor Input and Signal Conditioning

Four configurable input channels accept either proximity probes or accelerometers. Proximity inputs accept a –3 V to –24 V DC signal range. Accelerometer inputs handle a ±10 V peak signal swing. The frequency response spans 0.3 Hz to 15 kHz for comprehensive vibration analysis. This flexibility suits various machine types and monitoring requirements.

Measurement Performance and Processing

The 14-bit resolution delivers accurate vibration measurements across the dynamic range. The module processes each channel independently for simultaneous monitoring. It computes overall vibration amplitude and alert/alarm status. The device also supports band-pass filtering for specific frequency analysis.

Output and Alarm Functions

Four isolated 4–20 mA outputs transmit vibration data to control systems. Users can configure each output for displacement, velocity, or acceleration scaling. Four Form C relays provide alarm and danger outputs for each channel. These relays handle up to 2 amperes at 30 V DC.

Communication and System Integration

An RS-485 port supports Modbus RTU for remote data access and configuration. This interface allows integration with plant-wide monitoring networks. Users can read vibration values and alarm status remotely. The module also accepts configuration commands via the serial link.

Diagnostic Features and Status Monitoring

Eight front-panel LEDs provide comprehensive module status visibility. Two LEDs indicate power and overall module health. Four channel OK LEDs confirm normal sensor operation. Four alarm LEDs illuminate when vibration exceeds preset thresholds. These diagnostics simplify maintenance and troubleshooting.

Application Suitability

This vibration monitoring module serves critical rotating equipment across many industries. It works effectively with steam turbines, gas turbines, and compressors. The device also monitors pumps, motors, and paper machine rolls. Its operating temperature ranges from -20°C to +65°C.