Bently Nevada 3300/03-01-03 System Monitor Module

This system monitor module provides the main power supply and communication interface for 3300 racks. It distributes regulated DC power to all installed monitoring cards. The unit also manages serial communication for the entire rack system.

Technical Specifications

Parameter	Specification
Model Number	3300/03-01-03
Product Type	System Monitor Module / Power Supply and Communication
Input Voltage	100–240 V AC ±10% (47–63 Hz)
Output Power	30 W (maximum)
Rack Supply	24 V DC (regulated, up to 1.2 A)
Output Ripple	≤50 mV peak-to-peak
Communication	1 x RS-232 (configuration), 1 x RS-485 (Modbus RTU)
Rack Interface	Backplane connectors (power and data)
Fault Memory	100 event logs (non-volatile)
Status Indicators	4 x LED (Power, OK, Comm, Fault)
Battery	3.6 V lithium (for real-time clock backup)
Mounting	Backplane rack (leftmost slot)
Dimensions (W x H x D)	26 mm x 223 mm x 175 mm
Weight	0.50 kg

Mechanical Design and Rack Positioning

This system monitor module follows the standard 3300 series rack form factor. Its 26 mm width occupies the dedicated leftmost slot in the chassis. The unit weighs 0.50 kilograms and includes a sturdy metal front panel. A keyed connector prevents incorrect insertion into the backplane.

Power Supply and Electrical Characteristics

The device accepts a universal AC input from 100 to 240 volts. It operates at line frequencies ranging from 47 to 63 hertz. The module delivers a regulated 24 V DC output at up to 1.2 amperes. The output ripple stays below 50 mV peak-to-peak for clean power delivery. This power supply serves all other cards in the rack.

Communication and System Interface

An RS-232 port provides local configuration access for setup and diagnostics. An RS-485 port supports Modbus RTU for remote monitoring and control. The module also communicates with all rack cards through the backplane. This backplane interface carries both power and data signals.

Diagnostic Features and Status Monitoring

Four front-panel LEDs provide immediate system status visibility. The Power LED confirms the AC input voltage is present. The OK LED indicates proper DC output and module health. The Comm LED shows activity on the communication ports. The Fault LED signals any internal or rack-wide error conditions.

Data Logging and Event Storage

The module stores up to 100 event logs in non-volatile memory. These logs retain time-stamped records of alarms and system events. The built-in battery maintains the real-time clock during power loss. This clock ensures accurate time-stamping for all logged events. The battery has a typical service life of five years.

Energy Storage and Ride-through Capability

Internal capacitors provide a 20-millisecond hold-up time for the DC output. This reserve maintains power during brief AC interruptions. The hold-up feature prevents unexpected resets of rack cards. This capability ensures system continuity during grid fluctuations.

Application Suitability

This system monitor module serves as the backbone of 3300 monitoring systems. It works effectively in power plants, refineries, and petrochemical facilities. The device also supports paper mills, steel plants, and offshore installations. Its operating temperature ranges from -20°C to +65°C.