How to Use MEAN WELL HDR-30-24: Examples, Pinouts, and Specs

The MEAN WELL HDR-30-24 is a 30W, 24V DC power supply designed for industrial applications. It features a compact DIN rail-mountable design, high efficiency, and robust protection mechanisms, including short circuit, overload, and overvoltage protection. This power supply is ideal for powering industrial control systems, automation equipment, and other devices requiring a reliable 24V DC power source.

• Industrial automation and control systems
• Building automation
• Security and surveillance systems
• LED lighting systems
• Communication equipment

The following table outlines the key technical details of the MEAN WELL HDR-30-24:

The MEAN WELL HDR-30-24 has the following terminal connections:

1. Mounting: Secure the HDR-30-24 onto a DIN rail (TS-35/7.5 or TS-35/15) in your control panel or enclosure.
2. Input Connection:
   • Connect the AC Line wire to the L terminal.
   • Connect the AC Neutral wire to the N terminal.
   • Optionally, connect the Frame Ground (Earth) wire to the FG terminal for safety.
3. Output Connection:
   • Connect the positive load wire to the +V terminal.
   • Connect the negative load wire to the -V terminal.
4. Power On: Once all connections are secure, supply AC power to the input terminals. The power supply will convert the AC input to a stable 24V DC output.

• Input Voltage: Ensure the input voltage is within the specified range (85-264VAC). Operating outside this range may damage the power supply.
• Load Requirements: Do not exceed the maximum output current of 1.25A or the power rating of 30W.
• Ventilation: Install the power supply in a well-ventilated area to prevent overheating. Avoid obstructing the ventilation slots.
• Protection Features: The HDR-30-24 includes built-in short circuit, overload, and overvoltage protection. If the power supply shuts down due to a fault, disconnect the load, resolve the issue, and restart the power supply.

The HDR-30-24 can be used to power an Arduino UNO and other peripherals. Follow these steps:

1. Connect the +V terminal of the HDR-30-24 to the Arduino's VIN pin.
2. Connect the -V terminal of the HDR-30-24 to the Arduino's GND pin.
3. Ensure the total current draw of the Arduino and connected peripherals does not exceed 1.25A.

Here is an example Arduino sketch to blink an LED when powered by the HDR-30-24:

// This sketch blinks an LED connected to pin 13 of the Arduino UNO.
// Ensure the HDR-30-24 is properly connected to the Arduino's VIN and GND pins.

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. No Output Voltage:

   • Cause: Input voltage is not within the specified range.
   • Solution: Verify the AC input voltage and ensure it is between 85-264VAC.

2. Power Supply Shuts Down:

   • Cause: Overload or short circuit on the output.
   • Solution: Disconnect the load, check for short circuits, and ensure the load does not exceed 1.25A.

3. Overheating:

   • Cause: Poor ventilation or operation in a high-temperature environment.
   • Solution: Improve ventilation around the power supply and ensure the ambient temperature is within the -30°C to +70°C range.

4. Noise or Ripple on Output:

   • Cause: Improper grounding or excessive load.
   • Solution: Check the grounding connection and reduce the load if necessary.

Q1: Can the HDR-30-24 be used outdoors?
A1: No, the HDR-30-24 is not weatherproof. It should be installed in a dry, indoor environment or within a weatherproof enclosure.

Q2: What happens if the load exceeds 1.25A?
A2: The power supply's overload protection will activate, shutting down the output to prevent damage. Reduce the load and restart the power supply.

Q3: Can I use the HDR-30-24 to charge batteries?
A3: The HDR-30-24 is not designed for direct battery charging. Use a dedicated battery charger for this purpose.

Q4: Is the HDR-30-24 compatible with 3-phase power?
A4: No, the HDR-30-24 is designed for single-phase AC input only.