MEAN WELL NDR-480-24 High Power Fanless Switching Power Supply 480W 24V 20A

The MEAN WELL NDR-480-24 is a high-power, fanless, 480W, 24V, 20A industrial switching power supply engineered for demanding applications. Its robust design boasts high reliability, excellent efficiency, and comprehensive protection features, making it a superior choice for various industrial automation, control, and monitoring systems. Key advantages include its fanless operation for silent, dust-free environments, a wide operating temperature range, and adherence to stringent safety and EMC standards.

Product Specifications

| Parameter              | Specification                               |

| :--------------------- | :------------------------------------------ |

| Model              | NDR-480-24                                  |

| Output Voltage     | 24V DC                                      |

| Rated Current      | 20A                                         |

| Rated Power        | 480W                                        |

| Input Voltage Range| 90-264VAC (47-63Hz), 127-370VDC             |

| Efficiency         | 93%                                         |

| Operating Temp.    | -30°C to +70°C                              |

| Dimensions (L x W x H)| 215 x 115 x 51 mm                           |

| Certifications     | UL, CUL, TUV, CB, CE                        |

| Protection         | Short circuit, Overload, Over voltage, Overtemp |

Core Features & Market Positioning

The MEAN WELL NDR-480-24 distinguishes itself through its advanced thermal design, enabling fanless operation even at full load across a broad temperature range of -30°C to +70°C. This makes it ideal for environments where dust accumulation or fan failure is a concern, such as in food processing, pharmaceutical, or heavily industrialized settings. Its high efficiency of up to 93% translates to reduced energy consumption and heat generation, contributing to a longer lifespan and lower operational costs. Positioned as a premium industrial power solution, the NDR-480-24 offers exceptional reliability and robust protection against common electrical disturbances, ensuring stable power delivery for critical equipment.

Key Application Scenarios

This industrial power supply is a prime candidate for applications requiring stable and high-current 24V DC power. Common use cases include powering industrial automation machinery, programmable logic controllers (PLCs), motor drives, LED signage, and various control systems within manufacturing plants. Its fanless design is particularly advantageous for cleanroom environments or where noise is a factor, such as in broadcasting equipment or advanced laboratory instrumentation. The 20A output current capacity makes it suitable for systems with significant power demands, ensuring consistent performance for demanding operational cycles.

Practical System Integration Guidance

Integrating the MEAN WELL NDR-480-24 is straightforward due to its standard form factor and accessible terminal blocks. Ensure proper wiring by connecting the AC input terminals (L, N) and the DC output terminals (+V, -V) according to the product's labeling and safety guidelines. For optimal heat dissipation, maintain adequate clearance around the unit, especially in enclosed panels, by adhering to the recommended minimum space requirements outlined in the datasheet. Proper grounding of the chassis to the system's earth ground is critical for safety and electromagnetic compatibility (EMC).

Operation and Risk Mitigation

The NDR-480-24 incorporates comprehensive protection circuits to safeguard both the power supply and connected loads. Overload protection (OLP) limits the output current to prevent damage during unexpected surges, while over-voltage protection (OVP) and over-temperature protection (OTP) ensure safe shutdown in critical scenarios. In the unlikely event of a fault, consult the user manual for specific error codes or behaviors. Always ensure the unit is properly ventilated, even though it's fanless, and avoid operating it outside the specified input voltage or ambient temperature ranges to mitigate risks and ensure longevity.

Scalability & Long-Term Value

The MEAN WELL NDR-480-24 offers significant long-term value through its robust build quality and Mean Well's reputation for product longevity. Its standard dimensions and output voltage simplify integration into existing systems and facilitate future upgrades or expansions. While not directly IIoT-enabled, its stable and reliable power output is foundational for any connected industrial system, ensuring the uninterrupted operation of sensors, controllers, and communication modules. The absence of a cooling fan also reduces maintenance requirements over the product's lifespan, contributing to lower total cost of ownership.

Frequently Asked Questions

What is the maximum ambient temperature for the MEAN WELL NDR-480-24?

The MEAN WELL NDR-480-24 operates reliably in ambient temperatures ranging from -30°C to +70°C. This wide operational window ensures consistent performance in diverse industrial environments, from cold storage facilities to hot manufacturing floors.

This extensive temperature range is achieved through its fanless convection cooling design. The power supply's internal components are selected for their thermal resilience and efficiency.

The unit's robust construction and thermal management system mitigate the risk of overheating, even under sustained full load conditions within this specified range.

How do I connect the AC input to the NDR-480-24 power supply?

Connect the live (L) and neutral (N) wires of your AC mains supply to the corresponding L and N terminals on the NDR-480-24. Ensure these connections are secure and use appropriate gauge wiring rated for the expected current draw.

Always confirm that the AC input voltage is within the specified range of 90-264VAC before applying power. Proper wiring prevents potential short circuits and ensures safe operation.

Refer to the terminal markings on the power supply and consult the product datasheet for precise terminal identification and recommended wiring practices.

What protection features are built into the MEAN WELL NDR-480-24?

The NDR-480-24 is equipped with short circuit, overload, over-voltage, and over-temperature protection. These features safeguard both the power supply unit and the connected loads from electrical anomalies.

Overload protection (OLP) limits the output current, preventing damage if the connected equipment draws more power than designed. Over-voltage protection (OVP) cuts power if the output voltage exceeds safe limits.

Over-temperature protection (OTP) triggers a shutdown if the internal temperature of the power supply rises too high, typically due to extreme ambient conditions or prolonged overload, ensuring system integrity.