MEAN WELL NDR-75-48 Industrial Switching Power Supply 76.8W 48V 1.6A

The MEAN WELL NDR-75-48 stands as a robust industrial switching power supply, delivering 76.8W of power with a stable 48V output and a 1.6A current rating. This unit is engineered for reliability in demanding environments, offering key advantages such as high efficiency, compact design, and comprehensive protection features. Its core technical specifications include a wide AC input range (100-240V AC), low ripple and noise, and compliance with international safety and EMC standards, making the NDR-75-48 a versatile solution for a broad spectrum of industrial automation and control applications.

Product Specifications

| Parameter              | Value                     |

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

| Model              | NDR-75-48                 |

| Rated Power        | 76.8W                     |

| Output Voltage     | 48V DC                    |

| Output Current     | 1.6A                      |

| Input Voltage Range| 100-240V AC               |

| Efficiency         | Up to 89%                 |

| Dimensions (LxWxH) | 125.5 x 78 x 35 mm        |

| Operating Temp.    | -20°C to +70°C            |

| Certifications     | UL, TUV, CB, CE, EAC      |

Core Features & Market Positioning

The MEAN WELL NDR-75-48 differentiates itself through its robust construction and adherence to stringent industrial standards, positioning it as a reliable workhorse for critical systems. Its high efficiency rating (up to 89%) contributes to reduced energy consumption and heat generation, essential for extended operational life in enclosed industrial cabinets. The slim profile, measuring only 125.5 x 78 x 35 mm, facilitates space-saving integration into densely populated control panels. Furthermore, comprehensive built-in protections, including short circuit, overload, over-voltage, and over-temperature safeguards, underscore its suitability for mission-critical applications where downtime is unacceptable. Market reviews consistently highlight MEAN WELL's reputation for quality and durability, with the NDR series embodying these principles.

Key Application Scenarios

This 48V industrial power supply is ideally suited for a variety of applications within the industrial automation landscape. Its stable voltage output makes it a prime candidate for powering control systems, Programmable Logic Controllers (PLCs), and human-machine interfaces (HMIs) in manufacturing environments. Sectors such as building automation, machine automation, and intelligent transportation systems frequently leverage power supplies like the NDR-75-48 for reliable operation of sensors, actuators, and communication modules. Its ability to operate across a wide temperature range (-20°C to +70°C) also makes it suitable for challenging environments found in outdoor or semi-outdoor installations.

Practical System Integration Guidance

Integrating the MEAN WELL NDR-75-48 into an industrial system is straightforward, thanks to its universal AC input and straightforward DC output terminals. Installation typically involves mounting the unit on a standard 35mm DIN rail, ensuring adequate ventilation around the power supply to maintain optimal operating temperatures. Proper wiring is crucial; connect the L and N terminals to the AC mains supply and the +V and -V terminals to the DC load. Grounding the FG terminal to the system ground is essential for safety and electromagnetic compatibility (EMC). For systems requiring redundant power, two NDR-75-48 units can be paralleled, though this requires appropriate external circuitry to ensure balanced load sharing.

Operation and Risk Mitigation

Operating the MEAN WELL NDR-75-48 requires adherence to safety guidelines, primarily ensuring the unit is properly grounded and connected to the correct voltage. The power supply incorporates internal protection mechanisms to mitigate common risks. In case of a short circuit or overload, the unit will typically shut down temporarily to prevent damage; power can be restored once the fault condition is cleared. Over-voltage protection will activate if the output voltage exceeds safe limits, and over-temperature protection will trigger if the internal temperature becomes excessive, usually due to inadequate ventilation or exceeding its rated load. Always consult the full datasheet for specific fault codes or behavior.

Scalability & Long-Term Value

The NDR-75-48 offers a degree of scalability through its ability to be paralleled with other compatible units, enabling increased current capacity for growing system demands. Its adherence to industry-standard form factors and voltage outputs ensures compatibility with a wide range of existing industrial components and platforms. For organizations embracing Industry 4.0 initiatives, integrating this power supply into networked systems allows for remote monitoring of voltage and current, contributing to predictive maintenance strategies and overall operational efficiency. This inherent compatibility and support for advanced industrial networking contribute to the long-term value and adaptability of the NDR-75-48 in evolving industrial environments.

Frequently Asked Questions

1. What is the primary application for the MEAN WELL NDR-75-48?

The MEAN WELL NDR-75-48 is designed for demanding industrial environments, offering stable 48V power. It is commonly used for PLCs, HMIs, and general automation tasks. Its robust design ensures reliability in manufacturing and control systems.

2. Can this power supply be used in extreme temperatures?

Yes, the NDR-75-48 operates reliably within a wide temperature range of -20°C to +70°C. This makes it suitable for various industrial settings, including those with fluctuating or challenging ambient conditions. Proper ventilation is still recommended.

3. What safety features are built into the NDR-75-48?

This unit includes comprehensive protection circuits. These safeguard against short circuits, overloads, and over-voltage conditions. It also features over-temperature protection for enhanced operational safety.

1. How is the MEAN WELL NDR-75-48 installed in an industrial panel?

Installation is typically done via a 35mm DIN rail. Ensure sufficient clearance around the unit for airflow. Connect AC input to L/N and DC output to the load terminals. Ground the FG terminal for safety.

2. What is the efficiency rating of this power supply?

The NDR-75-48 boasts a high efficiency rating, reaching up to 89%. This efficiency contributes to lower energy consumption and reduced heat generation within the system. It minimizes wasted power.

3. Are there any special wiring considerations for this 48V power supply?

Standard wiring practices for industrial power supplies apply. Ensure correct polarity for DC output to avoid damage to connected equipment. Use appropriate gauge wiring for the 1.6A current output.

1. What does the 76.8W rating signify for the NDR-75-48?

The 76.8W rating indicates the maximum continuous power output the supply can deliver. This is calculated by multiplying the output voltage (48V) by the output current (1.6A). It ensures it meets the power needs of connected devices.

2. Can I connect multiple NDR-75-48 units together?

Yes, these units can be paralleled to increase current capacity. This is useful for systems with higher power demands than a single unit can provide. Consult the manual for proper paralleling procedures.

3. What kind of AC input voltage does the NDR-75-48 accept?

The power supply features a universal AC input range from 100 to 240V AC. This wide input compatibility allows it to be used globally without the need for manual voltage selection. It offers great flexibility.

1. What is the significance of the 48V DC output?

A 48V DC output is common in industrial settings for powering various control devices and automation equipment. It provides a stable voltage level suitable for many electronic components. This voltage is considered safe.

2. How does the 1.6A current rating affect its usage?

The 1.6A rating specifies the maximum continuous current the supply can safely provide at its 48V output. Ensure your connected devices do not exceed this total current draw to prevent overload. It dictates load capacity.

3. What are the physical dimensions of this industrial power supply?

The MEAN WELL NDR-75-48 has compact dimensions of 125.5mm in length, 78mm in width, and 35mm in height. This slim profile is beneficial for installation in confined spaces within control cabinets. Space saving is a key advantage.

1. What certifications does the NDR-75-48 hold?

This power supply is certified by major international bodies, including UL, TUV, CB, CE, and EAC. These certifications attest to its safety, quality, and compliance with global standards for industrial electrical equipment. They ensure market access.

2. How can I troubleshoot common issues with the NDR-75-48?

Check for correct input voltage and output load. Ensure proper grounding and ventilation. If the unit shuts down, remove the load and reset power after clearing any fault condition. Refer to the manual for detailed error codes.

3. Is this power supply suitable for IIoT applications?

While the base unit doesn't have direct IIoT communication, its reliable performance and standard voltage output make it a foundational component. It can be integrated into larger IIoT systems managed by other devices. It serves critical infrastructure needs.

1. What is the warranty period for the MEAN WELL NDR-75-48?

MEAN WELL typically offers a substantial warranty period for its industrial power supplies, often around three years. This reflects their confidence in the product's durability and performance in industrial applications. Longer warranties are common for industrial grades.

2. How does the NDR-75-48 compare to other 48V industrial power supplies?

Compared to many competitors, the NDR-75-48 offers a strong balance of performance, reliability, and compact size. Its wide operating temperature range and robust protection features are key differentiators. MEAN WELL's brand reputation is also a factor.

3. Can this power supply be used in medical equipment?

While MEAN WELL produces medical-grade power supplies, the NDR-75-48 is primarily designed for industrial automation. For medical applications, it's crucial to select power supplies with specific medical certifications (e.g., IEC 60601). Always verify specifications for specific uses.

1. What is the ripple and noise level on the output of the NDR-75-48?

The NDR-75-48 typically features low ripple and noise, essential for sensitive electronic equipment. Specific values are usually detailed in the product datasheet, often expressed in mVp-p or mVrms. Low noise is critical for control systems.

2. Does the NDR-75-48 support active power factor correction (PFC)?

Yes, industrial power supplies in this class, including the NDR-75-48, usually incorporate active PFC circuitry. This helps to improve the power factor, reduce harmonic distortion, and ensure compliance with EMC regulations. It leads to better energy efficiency.

3. What is the expected lifespan of the NDR-75-48 power supply?

The lifespan is heavily dependent on operating conditions, particularly ambient temperature and load. MEAN WELL products are known for their longevity. With proper installation and operation within specifications, it can provide many years of service.

1. What are the recommended wiring terminals for the NDR-75-48?

The unit utilizes screw-type terminals for both AC input (L, N, FG) and DC output (+V, -V). These are robust and secure, suitable for industrial environments. Ensure screw connections are tightened properly for reliable contact.

2. Is there a specific sequence for powering up a system with the NDR-75-48?

Typically, you would apply AC power to the NDR-75-48 first, verifying stable DC output before powering on the connected loads. This sequence helps prevent potential inrush current issues or voltage transients affecting sensitive downstream electronics. Always follow system design guidelines.

3. What is the function of the FG terminal on the power supply?

The FG terminal stands for Frame Ground. It is crucial for safety and electromagnetic interference (EMI) reduction. This terminal must be connected to the chassis ground or earth ground of the system to ensure proper grounding.

1. What is the MEAN WELL NDR-75-48's role in automation?

It provides a stable and reliable 48V DC power source essential for operating automation components like PLCs, sensors, and actuators. Its robust design ensures consistent performance in demanding industrial settings. It's a foundational element.

2. How does the compact size benefit industrial installations?

The slim 35mm width allows for significant space savings in control cabinets. This is crucial where space is limited, enabling denser equipment configurations. It simplifies panel design and reduces overall footprint.

3. What are the implications of its high efficiency (up to 89%)?

Higher efficiency means less energy is wasted as heat. This leads to lower operating costs, reduced cooling requirements for the enclosure, and a longer lifespan for the power supply itself. It's an environmentally conscious choice.

1. Can the NDR-75-48 handle sudden load changes effectively?

Yes, MEAN WELL power supplies are designed with good transient response. They can generally handle fluctuations in load current without significant voltage deviation. This stability is vital for sensitive equipment.

2. What is the correct way to connect the DC output to a load?

Connect the positive DC output terminal (+V) to the positive terminal of your load and the negative DC output terminal (-V) to the negative terminal of your load. Always ensure correct polarity to prevent damage. Double-check connections.

3. Does the NDR-75-48 require external filtering for noisy environments?

While the unit has built-in filtering for EMC compliance, extremely noisy environments might benefit from additional output filtering. Consult the application notes or a system engineer if there are concerns about conducted or radiated emissions. External filters can enhance performance.