How to Use Mean Well UHP-350-24 Power Supply: Examples, Pinouts, and Specs

The Mean Well UHP-350-24 is a high-efficiency, compact, and fanless power supply designed for industrial and commercial applications. It delivers a stable 24V DC output with a maximum power of 350W. This power supply is known for its slim design, high reliability, and robust protection features, including short circuit, overload, and overvoltage protection. Its fanless design ensures silent operation and reduces maintenance requirements, making it ideal for noise-sensitive environments.

• Industrial automation equipment
• LED lighting systems
• Test and measurement instruments
• Communication systems
• Factory automation and control systems
• Applications requiring a reliable 24V DC power source

The UHP-350-24 features screw terminal connections for input and output. Below is the pin configuration:

1. Mounting: Secure the power supply in a well-ventilated area to ensure proper heat dissipation. Avoid enclosing it in a sealed box unless adequate ventilation is provided.
2. Input Connection:
   • Connect the AC mains supply to the L (Live) and N (Neutral) terminals.
   • Connect the FG terminal to the earth ground for safety.
3. Output Connection:
   • Connect the load to the V+ (positive) and V- (negative) terminals.
   • Ensure the load does not exceed the maximum output current of 14.6A.
4. Voltage Adjustment:
   • If necessary, use the V ADJ potentiometer to fine-tune the output voltage within the ±10% range (21.6V to 26.4V).
5. Power On:
   • After verifying all connections, power on the AC mains supply. The power supply will begin delivering a stable 24V DC output.

• Input Voltage: Ensure the input voltage is within the specified range (90-264VAC or 127-370VDC).
• Load Requirements: Do not exceed the maximum power output of 350W or the maximum current of 14.6A.
• Cooling: Although the UHP-350-24 is fanless, ensure adequate airflow around the unit to prevent overheating.
• Safety: Always connect the FG terminal to earth ground to minimize electrical hazards.
• Voltage Adjustment: Use the V ADJ potentiometer carefully to avoid overvoltage, which could damage connected devices.

The UHP-350-24 can be used to power an Arduino UNO and other peripherals. Below is an example of how to connect it:

1. Connect the V+ terminal of the power supply to the Arduino's VIN pin.
2. Connect the V- terminal of the power supply to the Arduino's GND pin.
3. Ensure the output voltage is set to 24V (or adjust it to 12V if using a voltage regulator for the Arduino).

// Example code to blink an LED connected to pin 13 of the Arduino UNO
// Ensure the Arduino is powered by the UHP-350-24 power supply

void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for 1 second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for 1 second
}

1. Can the UHP-350-24 be used outdoors?

   • No, the UHP-350-24 is not waterproof or weatherproof. It must be used in a dry, indoor environment.

2. What happens if the load exceeds 350W?

   • The power supply will activate overload protection and shut down the output to prevent damage. Reduce the load and restart the power supply.

3. Can I use the UHP-350-24 to charge batteries?

   • Yes, but ensure the output voltage is properly adjusted to match the battery's charging requirements. Use a charge controller for optimal performance and safety.

4. Is the power supply compatible with 3-phase AC input?

   • No, the UHP-350-24 is designed for single-phase AC input only.

This concludes the documentation for the Mean Well UHP-350-24 power supply. For further assistance, refer to the manufacturer's datasheet or contact Mean Well support.