MEAN WELL LRS-75-24 Automation Equipment Switching Power Supply 76.8W 24V 3.2A

The MEAN WELL LRS-75-24 is a robust 76.8W, 24V, 3.2A industrial switching power supply designed for demanding automation equipment applications. Its core advantages lie in its high reliability, compact design, and adherence to stringent safety standards, making it a preferred choice for engineers seeking stable and efficient power solutions. Key technical parameters include an input voltage range of 85-264VAC, a wide operating temperature range of -25 to +70°C, and built-in protections against short circuit, overload, over voltage, and over temperature.

Product Specifications

| Parameter                 | Value                                 |

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

| Manufacturer              | MEAN WELL                             |

| Series                    | LRS-75                                |

| Output Voltage            | 24V DC                                |

| Rated Current             | 3.2A                                  |

| Rated Power               | 76.8W                                 |

| Input Voltage Range       | 85-264VAC, 47-63Hz; 120-370VDC        |

| Efficiency (typical)      | 89%                                   |

| Operating Temperature     | -25°C to +70°C                        |

| Dimensions (L x W x H)    | 99mm x 82mm x 30mm                    |

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

| Isolation Voltage         | 3000VAC (I/P-O/P)                     |

| Compliance Standards      | UL60950-1, TUV BSMI, EN60950-1, EN55022 Class B, EN61000-3-2, -3-3, EN61000-4-2, -3, -4, -5, -6, -8, -11 |

Core Features & Market Positioning

The MEAN WELL LRS-75-24 stands out in the competitive industrial power supply market due to its exceptional cost-effectiveness without compromising on performance or reliability. Its fanless, convection-cooled design ensures quiet operation and minimizes potential points of failure, a significant advantage in environments where dust or vibration are concerns. The series is engineered for high efficiency, reducing energy consumption and heat generation, which translates to lower operating costs and extended product lifespan. MEAN WELL's reputation for producing durable and dependable power supplies further solidifies the LRS-75-24's market position as a trusted component for critical automation systems.

Key Application Scenarios

This switching power supply is ideally suited for a wide array of industrial automation applications. It powers control systems, sensors, actuators, and other essential components in manufacturing lines, such as conveyor belts, robotic arms, and automated assembly machines. Its versatility extends to building automation systems, powering lighting controls, access control systems, and HVAC equipment. Furthermore, the LRS-75-24 finds application in various industrial instrumentation, data acquisition systems, and communication equipment where a stable, regulated 24VDC is required. Its compact size and efficient heat dissipation make it suitable for integration into confined spaces within control cabinets and equipment enclosures.

Practical System Integration Guidance

Integrating the MEAN WELL LRS-75-24 into an automation system is straightforward. Ensure proper ventilation around the unit, as it relies on convection cooling. Connect the AC input terminals (L and N) to the mains supply, adhering to local electrical codes and safety regulations. The DC output terminals (+V and -V) should be connected to the load, paying close attention to polarity. For systems requiring redundancy or higher current capacity, multiple LRS-75-24 units can be paralleled, provided they have the same output voltage and are equipped with appropriate current-sharing capabilities. Always verify that the total load current does not exceed the power supply's rated capacity.

Operation and Risk Mitigation

Safe operation of the LRS-75-24 is paramount. Always disconnect mains power before making any wiring connections or disconnections. Ensure the unit is properly grounded via its grounding terminal to prevent electrical shock and EMI interference. Avoid operating the power supply in environments exceeding its specified temperature range or in areas with excessive humidity or corrosive atmospheres. In the event of an overload or short circuit, the unit's built-in protection mechanisms will activate, shutting down the output. Once the fault condition is rectified, the power supply will typically auto-recover, but it's crucial to investigate the root cause of the fault to prevent recurrence.

Scalability & Long-Term Value

The LRS-75-24 offers excellent long-term value through its inherent reliability and compatibility with evolving industrial standards. Its robust design minimizes the need for premature replacement, contributing to lower total cost of ownership. While not directly featuring IIoT connectivity, its stable 24VDC output can readily power sensors and devices that are part of modern smart factory ecosystems. Engineers can scale their systems by adding more LRS-75-24 units in parallel or by utilizing higher wattage models from the MEAN WELL LRS series to accommodate increased power demands as their automation infrastructure grows.

FAQs

Q1: What is the primary application for the MEAN WELL LRS-75-24?

This power supply is designed for industrial automation equipment. It provides stable 24VDC power for control systems, sensors, and actuators.

It is also suitable for building automation, powering various control and monitoring devices within structures. Its reliability makes it a good choice for critical infrastructure.

Its compact, fanless design allows for integration into tight spaces within control cabinets or machinery. It is energy-efficient and cost-effective for widespread deployment.

Q2: What are the key advantages of the LRS-75-24?

Its primary advantage is its high reliability and cost-effectiveness. It offers robust performance for industrial use.

The unit features a fanless design, ensuring quiet operation and reducing maintenance needs. This also enhances its suitability for dusty environments.

Built-in protections against short circuit, overload, and over-voltage ensure system safety and longevity. It adheres to stringent international safety standards.

Q3: Can the LRS-75-24 be used in high-temperature environments?

The power supply operates within a temperature range of -25°C to +70°C. This allows for operation in many industrial settings.

However, performance may derate slightly at the upper end of this range. Ensure adequate ventilation for optimal heat dissipation.

For continuous operation at the highest temperatures, consider integrating it with active cooling or selecting a higher-rated power supply. Always refer to the datasheet for precise derating curves.

Q4: What input voltage range does the LRS-75-24 support?

It supports a wide AC input voltage range from 85V to 264V at 47-63Hz. This makes it suitable for global applications.

It can also accept a DC input voltage range of 120V to 370V. This flexibility enhances its usability in various power configurations.

Always ensure the input voltage is within the specified range to prevent damage to the power supply. Proper grounding is also essential.

Q5: How efficient is the MEAN WELL LRS-75-24?

The LRS-75-24 boasts a typical efficiency of 89%. This high efficiency leads to reduced energy consumption.

Higher efficiency also means less heat is generated by the power supply. This contributes to its reliability and longevity, especially in fanless designs.

Lower energy waste translates to cost savings over the operational lifetime of the equipment it powers. It's an eco-friendly choice.

Q6: What protections are built into the LRS-75-24?

It includes crucial protections against short circuit, overload, and over voltage conditions. These safeguard connected equipment.

An over-temperature protection mechanism is also integrated, shutting down the unit if it overheats. This prevents damage from thermal stress.

Upon removal of the fault condition, the power supply typically auto-recovers. However, investigating the cause of the fault is recommended.

Q7: What are the physical dimensions of the LRS-75-24?

The power supply measures 99mm in length, 82mm in width, and 30mm in height. Its compact form factor is advantageous.

These dimensions allow for easy integration into standard control cabinets and enclosures with limited space. It minimizes the footprint within systems.

The slim profile facilitates dense component mounting, enabling more functionality within a smaller overall system size. Its physical design is highly practical.

Q8: Does the LRS-75-24 require a cooling fan?

No, the LRS-75-24 is a fanless power supply. It relies on natural convection for cooling.

This fanless design contributes to its quiet operation and increases its reliability by eliminating a common mechanical failure point. It's ideal for noise-sensitive applications.

Adequate surrounding airflow is still necessary to ensure the unit operates within its specified temperature limits. Avoid enclosing it in completely sealed, unventilated compartments.

Q9: Can multiple LRS-75-24 units be used together?

Yes, multiple LRS-75-24 units can be paralleled for increased current capacity. This allows for system scalability.

Ensure that all paralleled units have the same output voltage rating. Proper current sharing techniques may be required for optimal performance.

This parallel configuration is useful when the total load exceeds the capacity of a single unit, providing a flexible power solution. Always consult MEAN WELL's application notes for best practices.

Q10: What safety and compliance standards does the LRS-75-24 meet?

It complies with major international safety standards like UL60950-1 and TUV BSMI. These ensure a high level of electrical safety.

The product also meets EMC standards such as EN55022 Class B and EN61000-3-2, -3-3. This signifies good electromagnetic compatibility.

It also passes various immunity tests (EN61000-4-2, -3, -4, -5, -6, -8, -11), demonstrating resilience to electrical disturbances. This robust compliance is critical for industrial settings.