1. Introduction
This manual provides essential information for the safe and efficient use of your Lansan 48V 20A 1000W Switching Power Supply. Please read these instructions carefully before installation and operation. Keep this manual for future reference.
2. Safety Information
WARNING: This device operates with high voltage. Improper installation or use can result in electric shock, injury, or death. Only qualified personnel should perform installation and maintenance.
- Ensure the input voltage switch (110V/220V) is set correctly before connecting to power. Incorrect setting can damage the unit.
- Do not open the power supply casing. There are no user-serviceable parts inside.
- Ensure proper grounding to prevent electric shock.
- Install the unit in a well-ventilated area to prevent overheating.
- Avoid exposing the unit to moisture, dust, or corrosive environments.
- Disconnect power before making any connections or adjustments.
3. Product Overview
The Lansan 48V 20A 1000W Switching Power Supply converts AC input voltage to a stable DC 48V output. It features automatic protection mechanisms for short circuit, over voltage, over current, and high temperature.
This image shows the overall view of the power supply, highlighting the input (L, N, Ground) and output (COM, +V) terminal blocks, along with the voltage adjustment potentiometer (+V ADJ).
This image displays the side of the power supply, featuring the integrated cooling fan designed to dissipate heat and maintain optimal operating temperature.
This image illustrates the physical dimensions of the power supply, showing its length (240mm / 9.5 inches), width (123mm / 4.8 inches), and height (65mm / 2.6 inches).
This image provides a view of the internal circuitry of the power supply, including capacitors, transformers, heat sinks, and the cooling fan, demonstrating its robust construction.
3.1. Terminal Descriptions
| Terminal | Description |
|---|---|
| L | AC Live Input |
| N | AC Neutral Input |
| Ground Connection | |
| COM | DC Negative Output (-) |
| +V | DC Positive Output (+) |
| +V ADJ | Output Voltage Adjustment Potentiometer |
4. Setup
4.1. Input Voltage Selection
Before connecting the power supply to an AC source, ensure the input voltage switch is set to the correct voltage for your region (110V or 220V). This switch is typically located on the side of the unit. Incorrect setting will cause damage.
4.2. Wiring Instructions
Follow these steps for safe and correct wiring:
- Disconnect Power: Ensure the AC power source is disconnected before making any connections.
- Input Wiring (AC): Connect the AC Live wire to the 'L' terminal, the AC Neutral wire to the 'N' terminal, and the Ground wire to the '⏚' (Ground) terminal. Use appropriate gauge wires for the expected current.
- Output Wiring (DC): Connect the negative lead of your load to the 'COM' terminal and the positive lead to the '+V' terminal. Multiple '+V' and 'COM' terminals are provided for convenience.
- Secure Connections: Ensure all screw terminals are tightened securely to prevent loose connections, which can cause arcing or overheating.
5. Operating Instructions
5.1. Powering On
After all connections are securely made and verified, connect the power supply to the AC mains. The unit will power on, and the output voltage will be available at the '+V' and 'COM' terminals.
5.2. Voltage Adjustment
The output voltage can be finely adjusted using the '+V ADJ' potentiometer. Use a small screwdriver to carefully turn the potentiometer clockwise to increase the voltage or counter-clockwise to decrease it. Monitor the output voltage with a multimeter during adjustment to ensure it meets your requirements.
Note: Do not exceed the maximum rated voltage of your connected devices.
6. Maintenance
6.1. Cleaning
Periodically clean the exterior of the power supply with a soft, dry cloth. Ensure the cooling fan and ventilation openings are free from dust and debris to maintain proper airflow. Disconnect power before cleaning.
6.2. Ventilation
Ensure the power supply is installed in an environment with adequate airflow. Do not block the ventilation holes or the cooling fan. Proper ventilation is crucial for preventing overheating and ensuring the longevity of the unit.
7. Troubleshooting
If you encounter issues with your power supply, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No output voltage | No AC input power Incorrect input voltage switch setting Internal fuse blown Overload/Short circuit protection activated | Check AC power source and connections Verify 110V/220V switch setting Contact support (do not attempt to replace fuse) Disconnect load, check for shorts, then re-power |
| Output voltage too high/low | '+V ADJ' potentiometer misadjusted | Adjust '+V ADJ' potentiometer with a multimeter |
| Unit overheats | Poor ventilation Excessive load | Ensure adequate airflow, clear obstructions Reduce load to within specified limits |
| Intermittent operation | Loose connections Overload protection cycling | Check and tighten all wiring connections Reduce load, ensure it's within specifications |
If the problem persists after attempting these solutions, please contact customer support.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | 48V-20A-1000W |
| Power Type | Constant Voltage |
| Input Voltage | AC 110V / 220V (Switchable) |
| Output Voltage | DC 48V (Adjustable) |
| Output Current | 20A |
| Output Power | 1000W |
| Protection Features | Shortage Protection, Overload Protection, Over-voltage Protection |
| Dimensions (L x W x H) | 10 x 5 x 3 inches (240 x 123 x 65 mm) |
| Item Weight | 3.08 pounds (1.4 kg) |
| Material | Metal |
| Certification | CE |
| Connector Type | Screw Terminals |
9. Warranty and Support
9.1. Warranty Information
This Lansan power supply comes with a one-year warranty from the date of purchase. The warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by improper installation, misuse, accidents, unauthorized repairs, or modifications.
9.2. Customer Support
For technical assistance, warranty claims, or any questions regarding your product, please contact Lansan customer support through your retailer or the official Lansan website. Please have your model number and purchase date available when contacting support.
