How to Use Power Supply: Examples, Pinouts, and Specs

The MEAN WELL HDR-150-24 is a highly efficient, compact DIN rail power supply designed to provide reliable electrical energy to circuits. It converts AC mains voltage into a stable 24V DC output, suitable for powering a wide range of electronic devices and systems. With its slim design and high efficiency, the HDR-150-24 is ideal for industrial automation, building automation, and general-purpose applications requiring a dependable power source.

• Industrial automation systems
• Building automation and control
• LED lighting systems
• Security and surveillance equipment
• Laboratory and testing equipment
• General-purpose DC power supply for electronic circuits

The following table outlines the key technical details of the MEAN WELL HDR-150-24 power supply:

The HDR-150-24 features screw terminal connections for input and output. The pin configuration is as follows:

1. Mounting: Secure the HDR-150-24 onto a DIN rail (TS-35/7.5 or TS-35/15) in your enclosure or control panel.
2. Input Connection:
   • Connect the AC mains supply to the L (Line) and N (Neutral) terminals.
   • Connect the FG (Frame Ground) terminal to the earth ground for safety.
3. Output Connection:
   • Connect the +V terminal to the positive input of your load or circuit.
   • Connect the -V terminal to the negative input of your load or circuit.
4. Adjust Output Voltage (Optional):
   • Use the built-in potentiometer to fine-tune the output voltage within the range of 21.6V to 26.4V DC.
5. Power On:
   • Ensure all connections are secure, then power on the AC mains supply. The LED indicator on the power supply will light up to indicate proper operation.

• Input Voltage: Ensure the input voltage is within the specified range (85-264 VAC or 120-370 VDC).
• Load Requirements: Do not exceed the maximum output current of 6.5A or the total output power of 156W.
• Ventilation: Install the power supply in a well-ventilated area to prevent overheating.
• Safety: Always disconnect the power supply from the mains before making any wiring changes.
• Protection Features: The HDR-150-24 includes overload, overvoltage, and short-circuit protection. If the power supply shuts down due to a fault, disconnect the load, resolve the issue, and restart the power supply.

The HDR-150-24 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 HDR-150-24 to the Arduino's VIN pin.
2. Connect the -V terminal of the HDR-150-24 to the Arduino's GND pin.
3. Ensure the output voltage is set to 24V DC.

Here is a simple Arduino sketch to blink an LED when powered by the HDR-150-24:

// Simple LED Blink Example
// This code blinks an LED connected to pin 13 of the Arduino UNO.
// Ensure the Arduino is powered by the HDR-150-24 via the VIN and GND pins.

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. No Output Voltage:

   • Check the AC input connections (L and N) and ensure the mains power is on.
   • Verify that the FG terminal is properly grounded.
   • Inspect the load connections (+V and -V) for loose or incorrect wiring.
   • Ensure the load does not exceed the maximum output current or power rating.

2. Power Supply Shuts Down:

   • This may be due to overload, overvoltage, or a short circuit. Disconnect the load, resolve the issue, and restart the power supply.

3. Overheating:

   • Ensure the power supply is installed in a well-ventilated area.
   • Check for obstructions around the power supply that may block airflow.

4. LED Indicator Not Lit:

   • Verify that the input voltage is within the specified range.
   • Check for blown fuses or tripped circuit breakers in the AC mains supply.

Q: Can the HDR-150-24 be used with a battery as the input source?
A: Yes, the HDR-150-24 supports DC input voltage in the range of 120-370 VDC. Ensure the battery voltage is within this range.

Q: Is the output voltage adjustable?
A: Yes, the output voltage can be adjusted between 21.6V and 26.4V DC using the built-in potentiometer.

Q: Can I use this power supply to charge batteries?
A: The HDR-150-24 is not specifically designed for battery charging. Use a dedicated battery charger for optimal performance and safety.

Q: What type of DIN rail is compatible with this power supply?
A: The HDR-150-24 is compatible with TS-35/7.5 or TS-35/15 DIN rails.

Q: Does the power supply include a fan?
A: No, the HDR-150-24 is fanless and relies on natural air convection for cooling.