EPS-120-48 - Charger Mean Well - Free user manual and instructions
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| Product type | AC/DC power supply and battery charger |
| Brand | Mean Well |
| Model | EPS-120-48 |
| Output voltage | 48V DC |
| Output current | 2.5A |
| Output power | 120W |
| Input voltage range | 90-264V AC |
| Input frequency | 47-63Hz |
| Efficiency | 88% typical |
| Power factor correction | Active PFC |
| Dimensions (L x W x H) | 199 x 99 x 42 mm |
| Weight | 0.65 kg |
| Cooling method | Free air convection |
| Operating temperature | -20 to +70°C with derating |
| Protections | Short circuit, overload, overvoltage |
| Safety standards | UL, CUL, CE, TUV approved |
| Main functions | Converts universal AC input to stable 48V DC output |
| Maintenance and cleaning | Use a dry cloth; ensure ventilation slots are unobstructed |
| Safety instructions | Disconnect power before servicing |
| Spare parts and repairability | Repairable; replacement parts available through service centers |
| General information | Suitable for industrial, LED lighting and telecommunication applications |
Frequently Asked Questions - EPS-120-48 Mean Well
What is the input voltage range for the EPS-120-48?
The EPS-120-48 accepts a universal input from 90 to 264V AC, making it suitable for use worldwide. Always check your local mains voltage before connecting.
What is the output voltage and current?
The unit provides a regulated 48V DC output with a maximum current of 2.5A, giving 120W of continuous power.
Can I use this power supply as a battery charger?
Although it is a power supply, it can be used to charge a 48V battery bank if you add a suitable charge controller to manage the charging profile. The output is constant voltage, so direct connection may overcharge.
What protections does the EPS-120-48 have?
It features short circuit, overload, and overvoltage protection. When a fault occurs, the unit automatically recovers after the condition is removed.
How do I adjust the output voltage?
The EPS-120-48 has a built-in trim potentiometer (VR) that allows you to adjust the output voltage slightly, typically from 41.5V to 55.2V. Turn the pot with a small screwdriver.
Is the unit cooled by a fan?
No, it uses free air convection cooling. Ensure adequate ventilation around the enclosure to maintain reliable operation.
What is the operating temperature range?
The unit can operate between -20°C and +70°C, with derating above 50°C. Refer to the manual for the exact derating curve.
How should I clean and maintain the power supply?
Disconnect the power and wipe the enclosure with a dry cloth. Do not use liquids or solvents. Check that ventilation slots are free from dust.
What is the warranty period?
Mean Well offers a standard 3-year warranty for the EPS-120 series. Check with your distributor for specific terms.
Can I use this unit in a parallel configuration to increase power?
Yes, two EPS-120-48 units can be connected in parallel to double the current, but you need to use a load sharing circuit. For high-reliability applications, a redundancy module is recommended.
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USER MANUAL EPS-120-48 Mean Well
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Product information
Brand : Mean Well
Model : EPS-120-48
Category : Charger