Samsung PVU-2424 Industrial Power Supply

The Samsung PVU-2424 is a compact DIN rail mount power supply delivering 24V DC at 1A (24W). Designed for industrial automation systems, this unit converts 100-240V AC input to a regulated, isolated 24V DC output for powering PLCs, sensors, relays, and other control devices. It features high efficiency, low ripple, and comprehensive protection circuits, making it suitable for 24/7 operation in factory environments.

Technical Specifications

Input: 100-240V AC (85-264V AC acceptable), 50/60 Hz, efficiency ≥ 85% at full load. Inrush current ≤ 30A (cold start). Output: 24V DC ±2% adjustable via potentiometer (±10% range). Rated current: 1A continuous, 1.5A peak for 10 seconds. Ripple and noise ≤ 120 mVp-p. Hold-up time: ≥ 20 ms at 230V AC full load. Protection: Overload (105-150% of rated output, hiccup mode auto-recovery), short-circuit (latching, reset by power cycle or removal of fault), over-voltage (29-33V, latching). Operating temperature: -25°C to +70°C (derate output linearly above 50°C to 0.5A at 70°C). Storage: -40°C to +85°C. Cooling: natural convection.

Key Features

• DIN rail mounting (TS35/7.5 or 15)

• Universal AC input (100-240V AC)

• 24V DC nominal output, adjustable

• 1A continuous, 1.5A peak

• Overload, short-circuit, over-voltage protections

• LED indicator for DC OK

• Screw-type terminals (input and output)

• Dimensions: 90mm (H) x 54mm (W) x 58mm (D)

• Weight approx. 0.25 kg

• Complies with UL 508, IEC 60950-1, CE

Installation and Wiring

The PVU-2424 mounts on 35mm DIN rail (EN 60715). Allow 15mm clearance above and below for ventilation. Input terminals: L (live), N (neutral), and ground (earth) are required. Output terminals: +V (positive), -V (negative). The output common is isolated from input and ground, but can be grounded if needed. Use copper wire only, 0.5 to 2.5 mm² (AWG 20-14). Torque terminals to 0.5 Nm. The DC OK LED lights green when output voltage is within specification (>21.6V).

Applications

This power supply is intended for control cabinets supplying 24V DC to PLCs (e.g., Samsung, Siemens, Mitsubishi), HMI panels, sensors (proximity, photoelectric), small relays, and solenoid valves. The 1A capacity is suitable for small to medium control systems with moderate power demands. Multiple units can be used for separate voltage domains (e.g., PLC logic, I/O, field devices).

Protection Features

Overload protection: When output current exceeds 105-150% of rated, the supply reduces output voltage in hiccup mode; when the overload is removed, output recovers automatically. Short-circuit protection: Immediately limits output current and latches; remove fault and recycle input power to reset. Over-voltage protection: If output voltage exceeds approx. 32V due to internal failure, the supply shuts down (latching). Recycle input to reset. Input fuse is internal (non-replaceable).

Derating Curve

At ambient temperatures from -25°C to +50°C, full output 1A is available. From 50°C to 70°C, derate linearly to 0.5A. For temperatures below 0°C, ensure no condensation. The enclosure provides natural convection cooling; do not block ventilation slots. Installation orientation: horizontal with terminals facing up/down is preferred for optimal cooling.

Standards and Safety

The PVU-2424 complies with EN 61000-6-2 (industrial immunity), EN 61000-6-3 (emissions), EN 60950-1 (safety of information technology equipment), and UL 508 (industrial control equipment). It is CE and RoHS marked. The unit is designed for pollution degree 2 environments and overvoltage category II. Input-to-output isolation is 3 kV AC, 1 minute. Output-to-ground isolation is 500V DC.

Maintenance and Life Expectancy

Mean Time Between Failures (MTBF) exceeds 500,000 hours at 25°C (MIL-HDBK-217F). No routine maintenance is required. If the DC OK LED is off, check input power, fuses, and output load for short circuits. Replace the unit if internal damage is suspected; the power supply is not user-serviceable.

Conclusion

The Samsung PVU-2424 provides a reliable, compact power source for 24V DC industrial control systems. Its protection features, wide input range, and DIN rail mounting make it a practical choice for automation cabinets requiring up to 24W of clean DC power.