MEAN WELL LRS-75 Power Supply

LRS-75 Power Supply Overview

The LRS-75 Power Supply from MEAN WELL provides stable 24V DC power for industrial machinery, control systems, automation equipment and compatible low-voltage devices. The LRS-75-24 model delivers up to 3.2A rated current and 76.8W output power, making it suitable for applications that require compact and dependable DC power.

Moreover, the unit accepts a wide input range of 85–264V AC or 120–373V DC. Therefore, installers can use it across different electrical networks without manually selecting an input voltage.

Compact Low-Profile Design

The LRS-75-24 measures approximately 99 × 97 × 30mm. As a result, it fits easily inside control panels, machinery housings, equipment cabinets and other installations where space is limited.

In addition, the ventilated metal enclosure supports effective heat dissipation. The power supply uses free-air convection instead of a cooling fan. Consequently, it operates quietly and contains fewer moving parts that may require maintenance.

However, the enclosure is not waterproof. Installers should place the unit inside a suitable protected cabinet and keep it away from water, excessive dust and accidental contact.

Efficient 24V DC Output

The LRS-75 Power Supply provides a regulated 24V DC output with up to 90% typical efficiency. This efficient operation helps reduce energy loss and unnecessary heat during continuous use. Furthermore, its no-load power consumption remains below 0.3W.

The built-in voltage-adjustment control also allows installers to fine-tune the DC output between approximately 21.6V and 28.8V. Nevertheless, the selected voltage must remain within the approved operating range of the connected equipment.

Built-In Electrical Protection

MEAN WELL equips the LRS-75 series with protection against:

• Short circuits
• Overload conditions
• Overvoltage

The overload protection uses hiccup-mode operation and automatically restores the output after the fault condition disappears. These functions help protect both the power supply and the connected equipment during abnormal operating conditions.

Recommended Applications

The MEAN WELL LRS-75-24 supports several professional applications, including:

• Industrial automation equipment
• Electrical control systems
• Mechanical and electrical machinery
• Electronic instruments
• Security and access-control equipment
• Display and signage systems
• Monitoring equipment
• Compatible 24V LED systems
• Low-voltage commercial equipment

MEAN WELL specifically identifies industrial automation, industrial control, mechanical and electrical equipment, and electronic instruments as suitable application categories for the LRS-75 series.

Installation Guidelines

First, confirm that the connected equipment requires a 24V DC supply. Next, calculate the total current and wattage of the load. The connected equipment must remain within the rated 3.2A and 76.8W limits.

Then, connect the AC live, neutral and protective-earth terminals according to the markings. After that, connect the positive and negative DC outputs with the correct polarity.

Finally, secure the unit firmly and maintain sufficient open space around the ventilated enclosure. The LRS-75 series can operate from -30°C to +70°C, although load derating applies at higher temperatures and under certain input-voltage conditions.

Technical Specifications

The technical values above come from the official MEAN WELL LRS-75 specifications.