Manuals+

LEDMO S-120-12

LEDMO 12V 10A 120W AC/DC Switching Power Supply User Manual

Model: S-120-12

1. Introduction

This manual provides essential instructions for the safe and efficient use of your LEDMO 12V 10A 120W AC/DC Switching Power Supply. Please read this manual thoroughly before installation and operation, and retain it for future reference.

2. Safety Information

WARNING: Risk of Electric Shock. This unit contains high voltage. Installation should only be performed by qualified personnel.

  • Ensure the input voltage switch (110V/220V) is set correctly for your region before connecting power. Incorrect setting can damage the unit.
  • Do not open the casing. There are no user-serviceable parts inside.
  • Protect the unit from moisture, dust, and extreme temperatures.
  • Ensure proper ventilation around the power supply to prevent overheating.
  • Disconnect power before making any connections or adjustments.
  • This device is designed for indoor use only.

3. Product Overview

The LEDMO S-120-12 is a robust AC/DC switching power supply designed to convert alternating current (AC) from your wall outlet to stable direct current (DC) for various applications, such as LED strip lights, industrial automation, and LED displays. It features built-in protection mechanisms for short-circuit, overload, over-voltage, and over-temperature conditions.

Product Features:

  • Dual Input Voltage: Selectable AC 110V/220V input.
  • Output: Stable DC 12V, 10A, 120W.
  • Protection: Short-circuit, Overload, Over Voltage, Over Temperature Protection.
  • EMI Filter: Built-in EMI filter for low output ripple and noise.
  • Durability: Rugged heavy-duty aluminum enclosure, 100% full load burn-in tested.
  • Cooling: Efficient cooling by free air convection.

Component Identification:

Top-down view of the LEDMO S-120-12 power supply showing input and output terminals.
Figure 1: Top-down view of the LEDMO S-120-12 power supply, highlighting the AC input terminals (L, N, Ground) and DC output terminals (-V, +V). Also visible is the voltage selection switch and the voltage adjustment potentiometer.
Internal components of the power supply, showing AC switch, DC switch, transformer, filter, and adjustable voltage button.
Figure 2: Internal view of the power supply circuit board, illustrating key components such as the AC switch, DC switch, transformer, filter-interference preventer, and the adjustable voltage button (potentiometer).

4. Setup & Installation

Follow these steps carefully to install your power supply.

4.1. Pre-Installation Check:

  1. Verify Input Voltage: Locate the red switch on the side of the unit. Ensure it is set to the correct voltage for your region (110V or 220V). Failure to do so will damage the unit.
  2. Power Off: Ensure all power sources are disconnected before making any connections.
  3. Mounting: Mount the power supply in a well-ventilated area, away from heat sources and moisture. The aluminum casing acts as a heatsink, so ensure adequate airflow.
LEDMO S-120-12 power supply with its perforated metal casing, showing the input/output terminals and voltage selection switch.
Figure 3: The LEDMO S-120-12 power supply, illustrating its compact design and perforated casing for heat dissipation.

4.2. Wiring Connections:

Refer to Figure 1 for terminal identification.

  • AC Input (L, N, ☉):
    • Connect your live AC wire to the 'L' terminal.
    • Connect your neutral AC wire to the 'N' terminal.
    • Connect the ground wire to the ground symbol (☉) terminal.
  • DC Output (-V, +V):
    • Connect the negative (-) wire of your LED strip or device to the '-V' terminals.
    • Connect the positive (+) wire of your LED strip or device to the '+V' terminals.
    • Multiple '-V' and '+V' terminals are provided for convenience when connecting multiple loads.

CAUTION: Ensure all connections are secure and properly insulated to prevent short circuits and electrical hazards.

5. Operation

Once all connections are made and verified:

  1. Apply Power: Connect the AC input to your power source. The power supply should turn on, indicated by a small LED (if present).
  2. Voltage Adjustment (Optional): A small potentiometer (labeled 'ADJ' or similar) is typically present near the DC output terminals. This allows for minor adjustments to the output voltage (e.g., from 11.5V to 12.5V). Use a small screwdriver to turn it clockwise to increase voltage or counter-clockwise to decrease it. Do not adjust beyond the recommended range.
  3. Load Connection: Your connected devices (e.g., LED strip lights) should now receive power.
Various application scenarios for the LEDMO power supply, including living room, kitchen, bar counter, and study room lighting.
Figure 4: Examples of common application scenarios where the LEDMO power supply can be used, such as ambient lighting in living rooms, kitchens, bar counters, and study areas.

6. Maintenance

The LEDMO S-120-12 power supply is designed for long-term stability and requires minimal maintenance.

  • Cleaning: Periodically clean the exterior of the unit with a dry, soft cloth to remove dust. Ensure the unit is unplugged before cleaning. Do not use liquid cleaners.
  • Ventilation: Ensure that the ventilation holes are not obstructed. Good airflow is crucial for optimal performance and longevity.
  • Connection Check: Occasionally check all wiring connections to ensure they remain tight and secure.
Image showing arrows indicating airflow for cooling over the perforated casing of the power supply.
Figure 5: Illustration of free air convection cooling, emphasizing the importance of unobstructed airflow for the power supply.

7. Troubleshooting

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

ProblemPossible CauseSolution
No output voltage / Unit not powering on1. Incorrect input voltage switch setting.
2. No AC input power.
3. Loose wiring connections.
4. Overload protection activated.		1. Verify the 110V/220V switch is set correctly.
2. Check AC power source and cable.
3. Re-check all input and output wiring.
4. Disconnect load, then reconnect power. Reduce load if necessary.
Output voltage is too low/high1. Voltage adjustment potentiometer misset.
2. Excessive load.		1. Use a small screwdriver to adjust the 'ADJ' potentiometer to the desired voltage.
2. Ensure total wattage of connected devices does not exceed 120W.
Unit gets excessively hot1. Insufficient ventilation.
2. Overload.		1. Ensure adequate airflow around the unit. Clear any obstructions.
2. Reduce the connected load to stay within the 120W limit.
Flickering or unstable output1. Loose connections.
2. Faulty load device.
3. Interference.		1. Check and secure all wiring connections.
2. Test with a different load device.
3. Ensure proper grounding and keep away from strong electromagnetic fields.

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

8. Specifications

FeatureDetail
ModelS-120-12
Input VoltageAC 100V/240V (selectable via switch)
Output VoltageDC 12V
Output Current10A
Output Power120W
MaterialAluminum
Product Dimensions15 x 11 x 5 cm (approx. 5.9 x 4.3 x 2 inches)
Item Weight240 Grams (approx. 0.53 lbs)
Protection FeaturesShort-circuit, Overload, Over Voltage, Over Temperature
CoolingFree air convection
CertificationsCCC, CE, FCC
Dimensions of the LEDMO S-120-12 power supply, showing length, width, and height measurements.
Figure 6: Dimensional drawing of the power supply, indicating its physical size for installation planning.

9. Warranty & Support

LEDMO products are manufactured with quality and reliability in mind. This product comes with a 5-year warranty covering maintenance or replacement for manufacturing defects.

Customer Support:

If you have any questions, require technical assistance, or need to claim warranty service, please contact LEDMO customer support. Our team is available to provide quick replies within 24 hours.

  • Online Support: Visit the official LEDMO store on Amazon for contact options.
  • Email: Refer to your product packaging or the LEDMO store for the most current email address.
An image of a customer service representative with a headset, symbolizing quick support.
Figure 7: LEDMO customer support is available to assist with inquiries and issues.
An image of a technician with a wrench, representing product maintenance and replacement services.
Figure 8: Our commitment includes providing maintenance or replacement services for eligible products.

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