MEAN WELL NDR-120-24 Industrial Grade Switching Power Supply 120W 24V 5A

The MEAN WELL NDR-120-24 is a robust 120W industrial-grade switching power supply designed for demanding applications, delivering a stable 24VDC output at 5A. Engineered for reliability and efficiency, this power supply boasts a wide operating temperature range, active PFC, and comprehensive protection features, making it an ideal choice for automation, control systems, and industrial equipment. Its compact design and DIN-rail mountability facilitate easy integration into various control cabinets and systems.

Product Specifications

| Feature              | Specification                               |

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

| Output Voltage       | 24VDC                                       |

| Rated Output Power   | 120W                                        |

| Output Current       | 5A                                          |

| Input Voltage Range  | 90-264VAC (wide range)                      |

| Efficiency           | Up to 89%                                   |

| Power Factor         | PF > 0.95 at 115VAC, PF > 0.90 at 230VAC      |

| Operating Temperature| -20°C to +70°C                              |

| Dimensions (L x W x H)| 125.5mm x 40mm x 115mm                       |

| Mounting             | TS-35/7.5 or 15 DIN rail mountable          |

| Protections          | Short circuit, Overload, Over voltage, Over temp |

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

| Isolation Class      | Class I, (GND)                              |

Core Features & Market Positioning

The MEAN WELL NDR-120-24 distinguishes itself through its industrial-grade construction and adherence to stringent safety and performance standards. Its wide AC input range (90-264VAC) ensures global compatibility and stable operation even with fluctuating power grids. The built-in active Power Factor Correction (PFC) circuitry enhances energy efficiency, reducing harmonic distortion and complying with international regulations. Furthermore, the high efficiency rating of up to 89% minimizes heat generation, contributing to a longer operational lifespan and reduced cooling requirements in enclosed systems. The unit's robust design and extensive protection mechanisms—short circuit, overload, over-voltage, and over-temperature—position it as a dependable power solution for critical industrial environments where downtime is unacceptable. Its compliance with major international safety certifications (UL, CUL, TUV, CB, CE) further solidifies its market standing as a trusted component for system integrators and engineers.

Key Application Scenarios

This 120W, 24V industrial power supply is exceptionally suited for a diverse range of demanding applications. It is a prime candidate for powering automation equipment, including Programmable Logic Controllers (PLCs), robotic systems, and motor drives, where consistent and reliable power is paramount. In the process control sector, the NDR-120-24 can reliably supply energy to sensors, actuators, and control instrumentation in harsh factory environments. Its broad operating temperature range makes it suitable for use in climate-controlled industrial settings as well as applications with less stable ambient conditions. Additionally, it finds utility in building automation systems, powering distributed control units and network devices, and in the manufacturing of specialized machinery where compact, DIN-rail mountable power solutions are required. The 5A output current is particularly useful for applications requiring moderate power delivery without compromising on size or efficiency.

Practical System Integration Guidance

Integrating the MEAN WELL NDR-120-24 into existing or new systems is straightforward due to its standard TS-35/7.5 or 15 DIN rail mounting capability. For installation, ensure the power supply is mounted vertically to allow for optimal convection cooling, especially when operating at higher loads or elevated ambient temperatures. Secure the unit firmly to the DIN rail using its integrated mounting clip. Wiring connections should be made using appropriately sized conductors for the input (AC) and output (DC) terminals. It is crucial to observe correct polarity for the DC output to prevent damage to connected loads. Before applying power, double-check all connections to prevent short circuits. Ensure adequate clearance around the unit for ventilation, following the manufacturer's recommendations to maintain performance and prevent overheating. The output voltage is internally fixed at 24VDC and is not adjustable on this model.

Operation and Risk Mitigation

Operating the MEAN WELL NDR-120-24 requires adherence to basic electrical safety principles. Users should always ensure the power supply is properly grounded via its designated ground terminal to prevent electrical shock and protect connected equipment. Avoid operating the unit beyond its rated 120W output to prevent overload conditions, which are protected but can still lead to premature component stress. The wide input voltage range means that it can be safely connected to standard industrial power sources globally. In case of an overload or short circuit, the power supply will typically shut down to protect itself and the connected load. Once the fault condition is removed, the unit can usually be reset by cycling the AC input power. Over-temperature protection will also trigger a shutdown if the internal temperature exceeds safe limits; ensuring adequate ventilation is key to preventing this. Refer to the official MEAN WELL documentation for detailed troubleshooting and specific fault code interpretations if any arise.

Scalability & Long-Term Value

The MEAN WELL NDR-120-24 offers excellent long-term value through its robust design and MEAN WELL's reputation for product reliability and longevity. While this specific model is a fixed 120W unit, scalability in systems utilizing it often involves deploying multiple NDR-120-24 units in parallel (if the system requires more current and the units support parallel operation, consult datasheets for specific models) or selecting higher wattage models from the same NDR series for future expansions. Its broad compatibility with standard industrial control components and protocols ensures smooth integration into existing or evolving automation architectures. The trend towards Industry 4.0 and IIoT (Industrial Internet of Things) means that reliable, efficient power is foundational. While the NDR-120-24 itself may not have direct digital communication capabilities, its stable power output is essential for the reliable operation of connected smart devices and sensors, contributing to the overall data integrity and performance of digitized industrial processes.

FAQs

What is the maximum ambient temperature for the MEAN WELL NDR-120-24?

The power supply can operate reliably in ambient temperatures ranging from -20°C to +70°C. This wide range ensures performance in diverse industrial environments. Proper ventilation is still critical, especially at the higher end of this spectrum.

What are the key protection features of this power supply?

It includes overload, short circuit, over-voltage, and over-temperature protections. These features safeguard both the power supply and the connected equipment from damage. They ensure operational safety and extend product lifespan.

How do I mount the MEAN WELL NDR-120-24?

This unit is designed for TS-35/7.5 or 15 DIN rail mounting. It clips securely onto standard industrial rails. Ensure vertical mounting for optimal heat dissipation via convection.

Can I adjust the output voltage of the NDR-120-24?

No, the output voltage is fixed at 24VDC. This model does not feature user-adjustable voltage settings. It is designed for applications requiring a stable, unadjustable 24V supply.

What is the efficiency rating of this power supply?

The MEAN WELL NDR-120-24 boasts an efficiency of up to 89%. This high efficiency minimizes energy waste and heat generation. It contributes to lower operating costs and a greener footprint.

What certifications does the NDR-120-24 hold?

It is certified with UL, CUL, TUV, CB, and CE. These certifications confirm compliance with international safety and performance standards. They are crucial for global market access.

What is the significance of active PFC in this unit?

Active PFC (Power Factor Correction) improves power efficiency. It also reduces harmonic distortion fed back into the power grid. This compliance is vital for many industrial regulations.

What are the dimensions of the NDR-120-24?

The dimensions are 125.5mm in length, 40mm in width, and 115mm in height. Its compact profile is ideal for space-constrained control cabinets. The narrow width is particularly beneficial for high-density installations.

What applications is this power supply best suited for?

It is ideal for industrial automation, PLCs, motor drives, and control systems. Its reliability and protective features make it suitable for demanding environments. Applications requiring stable 24V, 5A power are prime candidates.

How does the overload protection work?

In an overload scenario, the power supply will typically shut down automatically. This protects the unit and connected devices from damage. Power can usually be restored by cycling the AC input after the overload is removed.