How to Use 24V PSU: Examples, Pinouts, and Specs

The 24V Power Supply Unit (PSU), manufactured by Conor Curley, is a reliable and efficient device designed to convert AC voltage from the mains into a stable 24V DC output. This PSU is ideal for powering a wide range of electronic devices and circuits that require a 24V DC input. Its robust design ensures consistent performance, making it suitable for both industrial and hobbyist applications.

• Powering industrial control systems and automation equipment
• Supplying power to LED lighting systems
• Driving DC motors and actuators
• Providing power for Arduino, Raspberry Pi, and other microcontroller-based projects
• Charging 24V battery systems
• Laboratory and prototyping environments

The following table outlines the key technical details of the 24V PSU:

The 24V PSU typically features screw terminals for input and output connections. The pin configuration is as follows:

1. Safety First: Ensure the PSU is disconnected from the mains before making any connections.
2. Connect the Input:
   • Attach the live (L) and neutral (N) wires from the mains to the corresponding input terminals.
   • Connect the ground (GND) terminal to the earth wire for safety.
3. Connect the Output:
   • Connect the +V terminal to the positive input of your circuit or device.
   • Connect the -V terminal to the ground of your circuit or device.
4. Power On:
   • After verifying all connections, plug the PSU into the mains and switch it on.
   • Use a multimeter to confirm the output voltage is 24V DC before connecting sensitive devices.

• Load Requirements: Ensure the total current draw of connected devices does not exceed the PSU's maximum output current (5A).
• Ventilation: Place the PSU in a well-ventilated area to prevent overheating.
• Polarity: Double-check the polarity of the output connections to avoid damaging your devices.
• Fusing: Consider adding an inline fuse on the output side for additional protection.
• Arduino Compatibility: When using the PSU with an Arduino UNO, use a voltage regulator or step-down module if the Arduino requires a lower voltage (e.g., 5V or 9V).

To power an Arduino UNO using the 24V PSU, you can use a DC-DC buck converter to step down the voltage to 5V. Below is an example Arduino code to blink an LED, assuming the Arduino is powered via the PSU:

// Blink an LED connected to pin 13 of the Arduino UNO
// Ensure the Arduino is powered via a 5V DC-DC converter from the 24V PSU

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 I use this PSU to charge a 24V battery?

   • Yes, but ensure the battery charging current does not exceed the PSU's maximum output current (5A). Use a proper charging circuit for safety.

2. Is the PSU suitable for outdoor use?

   • No, this PSU is designed for indoor use only. Use a weatherproof enclosure if outdoor operation is required.

3. What happens if I exceed the maximum output current?

   • The PSU's overload protection will activate, shutting down the output to prevent damage. Reduce the load and restart the PSU.

4. Can I connect multiple devices to the PSU?

   • Yes, as long as the total current draw of all devices does not exceed 5A.

5. Does the PSU require a heatsink?

   • No, the PSU has built-in thermal management. However, ensure adequate ventilation to prevent overheating.

This concludes the documentation for the 24V PSU by Conor Curley. For further assistance, refer to the manufacturer's support resources.