How to Use 24v 300w 12.5A PSU: Examples, Pinouts, and Specs

The Reylax DT-NT24V-300W is a high-performance power supply unit (PSU) designed to convert AC mains power into a stable 24V DC output. With a maximum power output of 300 watts and a current capacity of 12.5 amps, this PSU is ideal for powering a wide range of electronic devices, including industrial equipment, LED lighting systems, 3D printers, and motor drivers.

• Industrial Automation: Powering sensors, actuators, and controllers.
• LED Lighting: Driving high-power LED strips and modules.
• 3D Printing: Supplying power to heated beds, stepper motors, and control boards.
• Robotics: Providing stable power for motors and control systems.
• DIY Electronics: Suitable for hobbyists working on high-power projects.

The following table outlines the key technical details of the Reylax DT-NT24V-300W:

The PSU features screw terminal connections for input and output. The pin configuration is as follows:

1. Mounting the PSU: Secure the PSU in a well-ventilated area to ensure proper cooling. Avoid placing it near heat sources or in enclosed spaces without airflow.
2. Connecting the Input:
   • Connect the L terminal to the live wire of the AC mains.
   • Connect the N terminal to the neutral wire of the AC mains.
   • Connect the GND terminal to the earth/ground wire for safety.
3. Connecting the Output:
   • Connect the +V terminal to the positive input of your load.
   • Connect the -V terminal to the negative input (ground) of your load.
4. Powering On: After verifying all connections, plug the PSU into the AC mains and switch it on. The built-in fan will activate, indicating the PSU is operational.

• Load Requirements: Ensure the total power consumption of your load does not exceed 300W or 12.5A.
• Ventilation: Maintain at least 10cm of clearance around the PSU for proper airflow.
• Wiring: Use appropriately rated wires for both input and output connections to handle the current safely.
• Polarity: Double-check the polarity of the output connections to avoid damaging your devices.
• Safety: Always disconnect the PSU from the mains before making any wiring changes.

The Reylax DT-NT24V-300W can be used to power devices connected to an Arduino UNO. For example, you can use it to drive a 24V DC motor controlled by the Arduino. Below is a sample wiring and code snippet:

1. Connect the +V terminal of the PSU to the positive terminal of the motor driver.
2. Connect the -V terminal of the PSU to the ground terminal of the motor driver.
3. Connect the motor driver to the Arduino UNO as per the motor driver's datasheet.

// Example code to control a 24V DC motor using an Arduino UNO
// and a motor driver powered by the Reylax DT-NT24V-300W PSU.

const int motorPin = 9; // PWM pin connected to the motor driver

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

void loop() {
  analogWrite(motorPin, 128); // Set motor speed to 50% (128 out of 255)
  delay(5000); // Run motor for 5 seconds

  analogWrite(motorPin, 0); // Stop the motor
  delay(2000); // Wait for 2 seconds before restarting
}

1. PSU Does Not Power On:

   • Check the AC mains connection and ensure the input voltage is within the specified range (100-240V AC).
   • Verify that the fuse inside the PSU is not blown.

2. No Output Voltage:

   • Ensure the load is connected properly to the output terminals.
   • Check for overload or short-circuit conditions that may have triggered the PSU's protection features.

3. Overheating:

   • Ensure the PSU is installed in a well-ventilated area.
   • Check if the load exceeds the PSU's maximum power rating.

4. Noise or Flickering in Connected Devices:

   • Verify that the PSU's output is properly filtered and stable.
   • Check for loose connections or insufficient wire gauge.

Q1: Can I use this PSU to charge batteries?
A1: This PSU is not designed for direct battery charging. Use a dedicated battery charger with appropriate charging profiles.

Q2: Is the PSU suitable for outdoor use?
A2: No, the PSU is not weatherproof. It should only be used in dry, indoor environments.

Q3: Can I adjust the output voltage?
A3: No, the output voltage is fixed at 24V DC and cannot be adjusted.

Q4: What happens if I exceed the maximum current rating?
A4: The PSU's overload protection will activate, shutting down the output to prevent damage. Reduce the load and restart the PSU.