DROK AC 110/220V to DC 0-24V 20A 480W Adjustable Switching Power Supply User Manual

1. Introduction

This manual provides detailed instructions for the safe and efficient operation of your DROK AC 110/220V to DC 0-24V 20A 480W Adjustable Switching Power Supply. Please read this manual thoroughly before use and retain it for future reference.

The DROK switching power supply is designed to convert AC input voltage (110V or 220V) to a stable and adjustable DC output voltage ranging from 0-24V, with a maximum current output of 20A and a total power of 480W. It features an LED display for real-time voltage and current monitoring, a cooling fan for temperature management, and built-in protection mechanisms.

2. Safety Precautions

WARNING: Improper use can lead to electric shock, fire, or damage to the device and connected equipment. Always follow these safety guidelines.

Ensure the input voltage switch (110V/220V) is set correctly according to your local power supply before connecting the unit to AC power. The default setting is 220V.
Do not exceed the maximum output current of 20A. Ensure connected devices require less than 20A.
This device is for indoor use only. Avoid exposure to moisture, high temperatures, or corrosive environments.
Ensure proper ventilation. Do not block the cooling fan or vents.
Disconnect power before making any connections or adjustments to the wiring.
Only qualified personnel should perform installation and maintenance.
The power supply is equipped with overload, overvoltage, and short-circuit protection. However, these are not substitutes for careful operation.

3. Product Specifications

Feature	Specification
Brand	DROK
Model	DC 0-24V 20A 480W
Input Voltage	AC 110V / 220V (Switchable)
Output Voltage Range	DC 0-24V (Adjustable)
Output Current	Max 20A (Load Dependent)
Output Power	Max 480W
Voltage Accuracy	0.1V
Display	LED for Voltage and Current
Cooling Method	Built-in Cooling Fan, Heatsink
Protection Features	Overload Protection, Overvoltage Protection, Short Circuit Protection
Dimensions	Approximately 215mm x 113mm x 50mm (8.46in x 4.45in x 1.97in)
Weight	Approximately 890g

4. Setup Instructions

Follow these steps to set up your DROK switching power supply:

4.1 Unpacking and Inspection

Carefully remove the power supply from its packaging. Inspect the unit for any signs of physical damage. If damage is found, do not proceed with installation and contact customer support.

4.2 Input Voltage Selection

Before connecting to AC power, verify the input voltage switch on the side of the unit. The switch allows selection between 110V and 220V. The default setting is 220V. Adjust this switch to match your local mains voltage to prevent damage to the power supply.

Input voltage selection switch set to 220V, with labels for 110V and 220V options.

Image: Input voltage selection switch. Ensure this is set correctly for your region.

4.3 Wiring Connections

The power supply features a terminal block for input and output connections. Refer to the diagram below for correct wiring. Ensure all connections are secure and properly insulated.

AC Input: Connect your AC mains power to the 'N' (Neutral) and 'L' (Live) terminals. The '⏚' (Ground) terminal should be connected to earth ground for safety.
DC Output: Connect your DC load to the '+V' (Positive) and '-V' (Negative) terminals.

Terminal block for wiring connections, showing input (N, L, Ground) and output (+V, -V) terminals, along with the digital display.

Image: Wiring terminal block and digital display. Connect AC input to N, L, and Ground. Connect DC output to +V and -V.

CAUTION: Incorrect wiring can cause severe damage to the power supply and connected devices, and poses a risk of electric shock.

5. Operating Instructions

Once the power supply is correctly wired and the input voltage is selected, you can begin operation.

5.1 Power On

Connect the AC power cord to the mains supply. The LED display will illuminate, showing the current output voltage and current.

Close-up of the LED display showing output voltage and current readings.

Image: LED display showing voltage and current. This display provides real-time output readings.

5.2 Adjusting Output Voltage

The output voltage can be adjusted using the potentiometer knob located on the front panel. Rotate the knob clockwise to increase the voltage and counter-clockwise to decrease it. The LED display will show the adjusted voltage in real-time.

Close-up of the potentiometer knob used for adjusting output voltage.

Image: Potentiometer knob for voltage adjustment. Turn to set desired output voltage.

NOTE: The output current is load-dependent and cannot be directly adjusted by a knob. The maximum output current is 20A. Ensure your load does not draw more than 20A.

5.3 Cooling Fan Operation

The built-in cooling fan operates automatically when the internal temperature reaches a certain threshold, ensuring the power supply remains within a safe operating temperature range. The fan is designed to operate quietly.

Top view of the power supply showing the cooling fan grill.

Image: Cooling fan grill on top of the unit. The fan activates automatically to maintain optimal temperature.

6. Maintenance

Regular maintenance ensures the longevity and reliable operation of your power supply.

Cleaning: Periodically clean the exterior of the unit with a soft, dry cloth. Ensure the ventilation openings and fan are free from dust and debris. Do not use liquid cleaners or solvents.
Ventilation: Ensure the power supply is always placed in a well-ventilated area. Do not obstruct the airflow around the unit.
Connections: Periodically check all wiring connections to ensure they are secure. Loose connections can lead to poor performance or safety hazards.
Storage: When not in use for extended periods, store the power supply in a cool, dry place, away from direct sunlight and moisture.

WARNING: Do not attempt to open the casing of the power supply. There are no user-serviceable parts inside, and doing so will void the warranty and expose you to dangerous voltages.

7. Troubleshooting

If you encounter issues with your DROK switching power supply, refer to the following table for common problems and solutions.

Problem	Possible Cause	Solution
No power / LED display off	No AC input power Input voltage switch incorrect Internal fuse blown	Check AC power cord and wall outlet. Verify the 110V/220V switch setting matches your local voltage. Contact customer support for assistance.
Output voltage unstable or incorrect	Loose output connections Overload condition Faulty potentiometer	Check and secure all DC output wiring. Reduce the load connected to the power supply. Ensure it's within 480W/20A. Contact customer support.
No output current / Low current reading	No load connected Short circuit in load Overload protection activated	Connect a suitable load. Check the connected device for short circuits. Reduce the load. The power supply will automatically recover once the overload is removed.
Cooling fan not operating	Unit is not under sufficient load/temperature Fan malfunction	The fan operates automatically when needed. This may not be a fault. If the unit is hot and the fan is not running, contact customer support.

If the problem persists after attempting these solutions, please contact DROK customer support.

8. Warranty & Support

This DROK power supply comes with a one-year warranty from the date of purchase. During this period, DROK will provide prompt support for any product issues or defects under normal use conditions.

The warranty does not cover damage caused by:

Improper installation or wiring.
Exceeding specified input/output parameters.
Unauthorized modifications or repairs.
Physical damage, misuse, or neglect.
Natural disasters or other external causes.

For warranty claims or technical support, please contact DROK customer service through the retailer where you purchased the product or visit the official DROK website for contact information.

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DROK DC 0-24V 20A 480W