Mean Well LRS-100-24 24V 4.5A 108W Switching Power Supply

A. Product Overview

The Mean Well LRS-100-24 24V 4.5A 108W SMPS Power Supply belongs to Mean Well's LRS-100 series of single output enclosed switching power supplies.

The LRS-100 series uses a compact 30 mm low profile metal enclosure and supports a universal 85 to 264V AC input. The LRS-100-24 version provides 24V DC output, 4.5A rated current and 108W rated power.

The unit provides approximately 90 percent typical efficiency, operates using free air convection without a cooling fan and supports an operating temperature range from minus 30°C to 70°C, subject to derating conditions.

It also includes protection against short circuit, overload and overvoltage, an LED power indicator and low no load power consumption below 0.3W.

B. Working Principle

The Mean Well LRS-100-24 works as an AC to DC switch mode power supply.

According to the block diagram on page 3 of the supplied datasheet, AC input first passes through an EMI filter. The signal is then rectified and filtered before entering the high frequency power switching stage.

The switching circuit operates at approximately 65 kHz and transfers power through an isolation transformer. On the output side, the power is rectified and filtered again to produce a stable DC output.

A detection circuit continuously monitors the output and sends feedback to the control section. The power supply also includes overload protection and overvoltage protection circuits to protect the unit and connected equipment during abnormal conditions.

C. Why It Is Used

The Mean Well LRS-100-24 is used when industrial or electronic equipment requires a stable 24V DC power supply from an AC mains source.

Its 24V DC output is commonly suitable for equipment such as PLC systems, sensors, transmitters, relays, controllers, HMI systems, electronic instruments and other control devices, provided that the total connected load remains within the 4.5A and 108W rating.

Mean Well specifically lists the following application areas for the LRS-100 series:

Industrial automation machinery
Industrial control systems
Mechanical and electrical equipment
Electronic instruments and equipment
Household appliances

The compact enclosure and free air convection cooling also make it suitable for installation inside electrical panels, machinery and control cabinets.

D. Suitable Buyers

The Mean Well LRS-100-24 is suitable for:

Industrial automation companies
Control panel manufacturers
Machine manufacturers
PLC system integrators
OEM equipment manufacturers
Electrical panel builders
Factory maintenance departments
Electronic equipment manufacturers
Industrial system integrators
Electrical contractors
Automation distributors
Industrial spare parts suppliers

It is particularly suitable for buyers looking for a 24V DC, 4.5A enclosed SMPS power supply for automation and industrial equipment.

Frequently Asked Questions

1. What is the output voltage of Mean Well LRS-100-24?
The LRS-100-24 provides a nominal output voltage of 24V DC.

2. What is the output current of LRS-100-24?
The rated output current is 4.5A.

3. What is the rated power of Mean Well LRS-100-24?
The rated output power is 108W.

4. What is the input voltage range?
The LRS-100-24 supports 85 to 264V AC input and 120 to 373V DC input.

5. Can the output voltage be adjusted?
Yes. The 24V model can be adjusted from approximately 21.6V to 28.8V DC.

6. What is the efficiency of LRS-100-24?
The LRS-100-24 has a typical efficiency of approximately 90 percent.

7. Does LRS-100-24 have short circuit protection?
Yes. It includes protection against short circuit, overload and overvoltage.

8. Does the Mean Well LRS-100-24 require a cooling fan?
No. It uses free air convection cooling and does not require an internal fan.

9. What is the operating temperature range?
The specified operating temperature range is minus 30°C to 70°C, subject to the derating curve and installation conditions.

10. What are the dimensions of Mean Well LRS-100-24?
The dimensions are approximately 129 mm x 97 mm x 30 mm.

11. Is LRS-100-24 suitable for industrial automation?
Yes. Mean Well specifically lists industrial automation machinery and industrial control systems as applications for the LRS-100 series.

12. Can LRS-100-24 be used for PLC panels?
Yes. Its regulated 24V DC output makes it suitable for many PLC and automation panel applications when the connected equipment operates within the 24V, 4.5A and 108W electrical rating.

13. Does the LRS-100-24 have an output power indicator?
Yes. It includes an LED indicator for power on status.

14. What protection is provided against overload?
The overload protection operates at approximately 110 to 150 percent of rated output power and uses hiccup mode, automatically recovering after the fault condition is removed.

15. Can the LRS-100-24 withstand temporary high AC input?
According to the datasheet, the series can withstand a 300V AC surge input for 5 seconds without damage.

16. What are the terminal connections?
According to the mechanical specification on page 4, the unit provides AC line, AC neutral, frame ground, negative DC output and positive DC output terminals.