How to Use MW LRS-350-24: Examples, Pinouts, and Specs

The MW LRS-350-24 is a 350W single-output switching power supply designed for a wide range of electronic applications. It delivers a stable 24V DC output voltage and is equipped with essential protection features such as short circuit, overload, and overvoltage protection. This power supply is compact, efficient, and reliable, making it ideal for powering LED strips, industrial equipment, automation systems, and other electronic devices requiring a 24V power source.

Below are the key technical details and pin configuration for the MW LRS-350-24:

The MW LRS-350-24 has a terminal block for input and output connections. Below is the pin configuration:

1. Input Connection:

   • Connect the AC input terminals (L and N) to the mains power supply.
   • Ensure the input voltage is within the specified range (85-264VAC).
   • Connect the FG terminal to the earth ground for safety.

2. Output Connection:

   • Connect the +V and -V terminals to the load (e.g., LED strips, motors, or other devices).
   • Ensure the load does not exceed the maximum output current of 14.6A.

3. Voltage Adjustment:

   • Use the V ADJ potentiometer to fine-tune the output voltage within the range of 22.8V to 26.4V if needed.

4. Cooling:

   • Ensure proper ventilation around the power supply to allow for natural convection cooling.
   • Avoid enclosing the power supply in a sealed box without airflow.

• Overload Protection: The power supply will enter protection mode if the load exceeds its rated capacity. Reduce the load to restore normal operation.
• Wiring: Use appropriately rated wires for both input and output connections to handle the current safely.
• Mounting: Secure the power supply on a non-conductive surface to prevent short circuits.
• Safety: Always disconnect the power supply from the mains before making any connections or adjustments.

The MW LRS-350-24 can be used to power an Arduino UNO and other peripherals. Below is an example setup:

1. Connect the +V terminal to the Arduino's VIN pin.
2. Connect the -V terminal to the Arduino's GND pin.
3. Ensure the output voltage is set to 24V using the V ADJ potentiometer.

Here is a simple Arduino code example to blink an LED when powered by the MW LRS-350-24:

// This code blinks an LED connected to pin 13 of the Arduino UNO.
// Ensure the MW LRS-350-24 is properly connected to the Arduino.

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

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 I use the MW LRS-350-24 with a 12V device?

   • No, the output voltage is fixed at 24V. Using it with a 12V device may damage the device. Consider using a step-down converter.

2. What happens if the load exceeds 14.6A?

   • The power supply will enter overload protection mode. Reduce the load to restore normal operation.

3. Can I mount the power supply vertically?

   • Yes, but ensure proper ventilation to maintain cooling efficiency.

4. Is the MW LRS-350-24 suitable for outdoor use?

   • No, it is not waterproof. Use it in a dry, indoor environment or within a weatherproof enclosure.

By following this documentation, you can safely and effectively use the MW LRS-350-24 in your projects.