1. Introduction
This manual provides essential information for the safe and effective operation of your DROK 48V Power Supply. This AC-DC switching power supply is designed to convert AC 110V/220V input to a variable DC 0-48V output with a maximum current of 10A and a rated power of 480W. It features a dual display for monitoring voltage and current, and includes built-in protection mechanisms.
2. Safety Information
- Input Voltage Selection: Before connecting the power supply, ensure the 110V/220V switch is set correctly according to your local voltage. Incorrect selection can cause severe damage to the unit. The default setting is typically 220V.
- Proper Wiring: Always follow the wiring diagram provided. Ensure all connections are secure and insulated to prevent short circuits.
- Load Compatibility: The maximum output current is 10A. Do not connect devices that require more than 10A, as this can damage the power supply. The actual current drawn will be determined by the connected load.
- Inductive Loads: When connecting inductive loads such as motors or fans, be aware of their maximum starting current. This parameter should not exceed the power supply's maximum current. If it does, a soft-starting protection circuit may be required for the load to absorb the impact current.
- Ventilation: Ensure adequate ventilation around the power supply to prevent overheating. The unit includes a smart cooling fan that activates automatically when needed.
- Protection Features: The unit is equipped with Over Load Protection, Over Voltage Protection, and Short Circuit Protection. However, these are safeguards and should not be relied upon to compensate for improper use.
3. Product Overview and Features
Figure 3.1: Overall view of the DROK 48V Power Supply, showcasing its compact design and integrated dual display.
Figure 3.2: High-accuracy LCD display showing output voltage and current, with the adjustable voltage knob on the left.
- Dual LED Display: Clearly shows real-time output voltage (V) and current (A).
- Adjustable Output Voltage: The output voltage can be precisely adjusted from 0V to 48V with 0.1V precision.
- Fixed Maximum Current: The maximum current is fixed at 10A and is unregulated. The actual current is determined by the load.
- Smart Cooling Fan: A built-in cooling fan automatically activates to maintain optimal operating temperature, especially during high power output.
- Robust Construction: Equipped with a heat sink for efficient thermal management.
4. Setup Guide
4.1 Input Voltage Selection
Before connecting the power supply to an AC source, locate the red switch on the side of the unit. This switch allows you to select between 110V and 220V input voltage. Ensure this switch is set to match your local mains voltage to prevent damage to the unit. The factory default setting is typically 220V.
4.2 Wiring Instructions
Connect your AC input and DC output wires to the terminal block as follows:
| Terminal Label | Description |
|---|---|
| ⌤ (Ground) | Ground connection for AC input. |
| N (Null wire) | Neutral wire for AC input. |
| L (Live wire) | Live wire for AC input. |
| V+ | Positive (+) DC output. |
| V- | Negative (-) DC output. |
Ensure all wire connections are firm and correctly polarized. Loose connections can lead to poor performance or safety hazards.
5. Operating Instructions
5.1 Powering On
After ensuring all wiring is correct and the input voltage switch is properly set, connect the power supply to your AC mains. The dual LED display will illuminate, showing the current output voltage and current.
5.2 Adjusting Output Voltage
To adjust the DC output voltage, rotate the potentiometer knob located on the side of the unit. Turn clockwise to increase voltage and counter-clockwise to decrease it. The voltage precision is 0.1V, allowing for fine adjustments. The display will update in real-time to show the set voltage.
5.3 Monitoring Output
The dual display provides continuous monitoring of the output voltage and the actual current being drawn by your connected load. Remember that the current is unregulated and will vary based on the load, up to a maximum of 10A.
6. Maintenance
The DROK power supply is designed for reliable operation with minimal maintenance. However, regular checks can prolong its lifespan:
- Cleaning: Keep the unit clean and free from dust, especially around the ventilation openings and the cooling fan. Use a soft, dry cloth for cleaning. Do not use liquid cleaners.
- Ventilation: Ensure the cooling fan and vents are not obstructed. The fan will automatically activate when the internal temperature rises.
- Connections: Periodically check all wiring connections to ensure they remain tight and secure.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/display off | No AC input; Incorrect input voltage selection; Internal fuse blown. | Check AC power source and cable. Verify 110V/220V switch setting. If still no power, contact support. |
| No DC output | Output short circuit; Overload protection activated; Loose output wiring. | Check load for short circuits. Reduce load if overloaded. Secure output wiring. |
| Incorrect voltage reading | Potentiometer not adjusted; Faulty display. | Adjust the voltage potentiometer. If display is still inaccurate, contact support. |
| Cooling fan not running | Normal operation (fan only runs when needed); Fan obstruction; Fan malfunction. | The fan is temperature-controlled; it may not run if the unit is cool. Check for obstructions. If unit is hot and fan is not running, contact support. |
8. Specifications
| Parameter | Value |
|---|---|
| Input Voltage | AC 110-220V ± 15% (selectable) |
| Output Voltage | DC 0-48V (adjustable) |
| Maximum Output Current | 10A (unregulated) |
| Rated Power | 480W |
| Voltage Precision | 0.1V |
| Product Dimensions (L*W*H) | 215mm * 115mm * 50mm (8.46" x 4.53" x 1.97") |
| Item Weight | 1.96 pounds |
| Protection Features | Over Load Protection, Over Voltage Protection, Short Circuit Protection |
9. Warranty and Support
DROK products are backed by a one-year warranty from the date of purchase. If you experience any quality issues with your item within this period, you are eligible for a brand new replacement.
For technical support, troubleshooting assistance, or warranty claims, please contact DROK customer service through the retailer where you purchased the product or visit the official DROK brand store online. You can find more information and contact details at the DROK Store on Amazon.
