A. Product Overview

The Mean Well NDR-240-24 is a 240W single output industrial DIN rail power supply designed for installation on TS-35/7.5 or TS-35/15 DIN rails. Its slim 63 mm wide metal housing helps save space inside electrical and automation cabinets.

The NDR-240-24 provides a regulated 24V DC output at 10A, with a rated power of 240W. The output voltage can be adjusted from 24V to 28V. Typical efficiency for the 24V model is 88.5 percent.

The power supply accepts a wide input range of 90 to 264V AC or 127 to 370V DC and operates at 47 to 63 Hz. It also includes built-in active PFC for improved power factor performance.

Key features include short circuit protection, overload protection, over voltage protection, over temperature protection, free air convection cooling, industrial immunity compliance and a 100 percent full load burn-in test.

B. Working Principle

The Mean Well NDR-240-24 works using switch mode power supply technology.

According to the block diagram on page 3 of the datasheet, the incoming power first passes through an EMI filter and rectifier stage. It then passes through the PFC circuit, followed by high frequency power switching. The converted energy is transferred through the transformer, rectified again and filtered before being supplied as regulated DC output.

The process can be described as:

AC or DC Input → EMI Filtering and Rectification → PFC Circuit → High Frequency Switching → Transformer → Rectification and Filtering → Regulated 24V DC Output

The internal control circuit continuously monitors the output and protection conditions. The design includes overload, over temperature, over voltage and over current related control functions shown in the manufacturer's block diagram.

For overload conditions, the unit uses constant current limiting and automatically recovers after the fault condition is removed.

C. Why It Is Used

The Mean Well NDR-240-24 is used when industrial equipment requires a reliable and regulated 24V DC power supply with up to 10A output current.

It is especially useful in automation panels where several 24V DC devices need to operate from one centralized power supply.

Typical applications include:

1. Industrial control systems
2. Factory automation systems
3. PLC control panels
4. HMI systems
5. Industrial sensors
6. Transmitters
7. Relays and contactors
8. Process controllers
9. Electromechanical equipment
10. Semiconductor manufacturing equipment
11. Machine control systems
12. Industrial instrumentation

Mean Well specifically lists industrial control systems, semiconductor fabrication equipment, factory automation and electromechanical applications for the NDR-240 series.

D. Suitable Buyers

The Mean Well NDR-240-24 DIN Rail SMPS is suitable for:

1. Industrial automation companies
2. PLC panel manufacturers
3. Control panel builders
4. Machine manufacturers
5. System integrators
6. Factory automation companies
7. Process control companies
8. Electrical contractors
9. OEM equipment manufacturers
10. Maintenance departments
11. Instrumentation companies
12. Semiconductor equipment manufacturers
13. Industrial electrical distributors
14. Automation engineers
15. Plant maintenance engineers

It is particularly suitable for applications requiring a compact DIN rail mounted 24V DC, 10A, 240W industrial power supply.

Frequently Asked Questions

What is Mean Well NDR-240-24?

The Mean Well NDR-240-24 is a 240W single output industrial DIN rail switching power supply designed to provide regulated 24V DC power for automation, control and industrial equipment.

What is the output of NDR-240-24?

The NDR-240-24 provides 24V DC output at up to 10A, with a total rated output power of 240W.

What is the input voltage range of Mean Well NDR-240-24?

The unit accepts 90 to 264V AC or 127 to 370V DC input.

Can the output voltage be adjusted?

Yes. The NDR-240-24 output voltage can be adjusted from approximately 24V to 28V.

What is the efficiency of NDR-240-24?

The typical efficiency of the 24V model is 88.5 percent.

Does NDR-240-24 have active PFC?

Yes. The NDR-240 series includes a built-in active PFC function. The datasheet specifies a typical power factor greater than 0.98 at 115V AC and greater than 0.95 at 230V AC under full load.

Is Mean Well NDR-240-24 suitable for PLC panels?

Yes. Its 24V DC output, DIN rail mounting and industrial design make it suitable for many PLC and automation control panels, provided the total connected load remains within the 10A and 240W ratings.

What DIN rail is compatible with NDR-240-24?

The NDR-240 series can be installed on TS-35/7.5 or TS-35/15 DIN rails.

Does the NDR-240-24 require a cooling fan?

No. The unit uses free air convection cooling and does not require an internal cooling fan under normal specified operating conditions.

What protections are available in NDR-240-24?

The power supply includes protection against short circuit, overload, over voltage and over temperature.

What happens during overload?

The NDR-240-24 uses constant current limiting during overload and automatically recovers when the fault condition is removed.

What is the operating temperature range?

The specified working temperature range is minus 20°C to 70°C, subject to derating conditions shown in the datasheet.

What are the dimensions of NDR-240-24?

The power supply measures approximately 63 x 125.2 x 113.5 mm, with width, height and depth respectively.

Where is Mean Well NDR-240-24 commonly used?

It is commonly used in industrial control systems, factory automation, semiconductor fabrication equipment and electromechanical applications.

Is Mean Well NDR-240-24 suitable for continuous industrial operation?

The NDR-240 series is designed for industrial applications and undergoes a 100 percent full load burn-in test according to the manufacturer.