How to Use Mean Well NDR Switch Mode DIN Rail Power Supply 90 → 264V ac Input, 24V dc Output, 10A 240W: Examples, Pinouts, and Specs

The Mean Well NDR Series DIN Rail Power Supply is a compact and efficient power supply designed for industrial applications. It converts a wide range of AC input voltages (90 to 264V AC) into a stable 24V DC output with a maximum current of 10A, delivering up to 240W of power. Its slim design and DIN rail mounting capability make it ideal for use in control panels, automation systems, and other industrial environments where space and reliability are critical.

• Industrial automation and control systems
• Building management systems
• Factory equipment and machinery
• LED lighting systems
• Security and surveillance systems

The Mean Well NDR power supply has screw terminal connections for input and output. Below is the pin configuration:

1. Mounting the Power Supply:

   • Secure the power supply onto a DIN rail (TS-35/7.5 or TS-35/15) in your control panel or enclosure.
   • Ensure proper ventilation around the unit to prevent overheating.

2. Connecting the Input:

   • Connect the AC input wires to the L (Live) and N (Neutral) terminals.
   • Connect the ground wire to the FG (Frame Ground) terminal for safety.

3. Connecting the Output:

   • Connect the load to the +V (Positive) and -V (Negative) terminals.
   • Ensure the load does not exceed the maximum output current of 10A.

4. Powering On:

   • After verifying all connections, supply AC power to the unit.
   • The power supply will automatically regulate the output to 24V DC.

• Input Voltage Range: Ensure the input voltage is within the specified range (90 – 264V AC). Operating outside this range may damage the unit.
• Load Requirements: Do not exceed the maximum output current of 10A to avoid triggering the overload protection.
• Ventilation: Maintain adequate airflow around the power supply to ensure proper cooling, especially in high-temperature environments.
• Wiring: Use appropriately rated wires for both input and output connections to handle the current safely.
• Grounding: Always connect the FG terminal to earth ground to minimize electrical noise and ensure safety.

The Mean Well NDR power supply 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 DC (default setting).

Here is a simple Arduino sketch to blink an LED when powered by the Mean Well NDR power supply:

// Blink an LED connected to pin 13
// Ensure the Arduino is powered via the Mean Well NDR 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 this power supply be used outdoors?
   No, the Mean Well NDR series is not weatherproof. It must be installed in a dry, indoor environment or within a weatherproof enclosure.

2. What happens if the load exceeds 10A?
   The power supply's overload protection will activate, shutting down the output to protect the unit. Reduce the load and restart the power supply.

3. Can I adjust the output voltage?
   Yes, the output voltage can be fine-tuned using the built-in potentiometer. However, it is recommended to keep the voltage close to 24V for optimal performance.

4. Is the power supply compatible with sensitive electronics?
   Yes, the Mean Well NDR series provides a stable and regulated output, making it suitable for sensitive electronics like microcontrollers and sensors.

By following this documentation, users can effectively integrate the Mean Well NDR power supply into their projects and troubleshoot common issues with ease.