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This DC power supply module converts AC mains voltage into regulated DC power for 3300 racks. It provides clean and stable energy to all installed monitoring cards. The unit ensures reliable system operation under varying load conditions.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | 3300/14-02-20-00 |
| Product Type | DC Power Supply Module |
| Input Voltage | 100–240 V AC ±10% (47–63 Hz) |
| Output Voltage | 24 V DC ±2% |
| Output Current | 2.0 A (continuous) |
| Output Power | 48 W (maximum) |
| Efficiency | 85% (typical at full load) |
| Ripple & Noise | ≤30 mV peak-to-peak |
| Hold-up Time | 25 ms (at 115 V AC input) |
| Protections | Overvoltage, overcurrent, short-circuit, overtemperature |
| Status Indicators | 2 x LED (Power, Fault) |
| Cooling | Natural convection (fanless) |
| Terminals | Screw-type (input and output) |
| Mounting | Backplane rack (dedicated slot) |
| Dimensions (W x H x D) | 52 mm x 223 mm x 175 mm |
| Weight | 0.85 kg |
Mechanical Design and Rack Integration
This power supply module follows the 3300 series rack form factor with a wider 52 mm footprint. It occupies a dedicated slot near the system monitor module. The unit weighs 0.85 kilograms and features a robust metal housing. All input and output connections are front-accessible for convenient wiring.
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 2.0 amperes. The output ripple stays below 30 mV peak-to-peak for clean power delivery. The conversion efficiency reaches 85 percent at full load.
Protection Mechanisms and System Safety
The unit integrates comprehensive protective features for reliable operation. Overvoltage protection clamps the output during regulator failure events. Overcurrent protection limits the supply during short-circuit conditions. An overtemperature shutdown turns off the module if internal temperatures exceed safe limits. These safeguards protect both the power supply and connected cards.
Energy Storage and Ride-through Capability
Internal electrolytic capacitors provide a 25-millisecond hold-up time. This reserve sustains the output during brief mains interruptions. The hold-up feature prevents unexpected resets of monitoring cards. This capability ensures system continuity during grid fluctuations.
Diagnostic Features and Status Monitoring
Two front-panel LEDs provide clear operational feedback. The green Power LED confirms the output voltage is present and stable. The red Fault LED signals any overcurrent or overtemperature condition. These visual aids simplify troubleshooting during system commissioning.
Cooling and Thermal Design
The fanless design relies on natural convection for heat dissipation. This passive cooling approach eliminates mechanical wear and noise. The housing includes ventilation slots for optimal airflow. The unit operates reliably across temperatures from -20°C to +65°C.
Application Suitability
This power supply module serves 3300 monitoring systems across many industries. It works effectively in power plants, refineries, and chemical facilities. The device also supports paper mills, steel plants, and offshore installations. Its robust construction ensures long-term dependable performance.