How to Use Mean Well SDR-480-48: Examples, Pinouts, and Specs

The Mean Well SDR-480-48 is a high-performance, 480W, 48V single-output switching power supply designed for industrial applications. It is known for its high efficiency (up to 94%), compact size, and robust design, making it ideal for demanding environments. The SDR-480-48 is equipped with built-in protections against overvoltage, overcurrent, and short circuit, ensuring reliable operation and safety.

• Industrial automation systems
• Factory equipment and machinery
• LED lighting systems
• Communication systems
• Renewable energy systems
• Control panels and instrumentation

The following table outlines the key technical specifications of the Mean Well SDR-480-48:

The SDR-480-48 features screw terminal connections for input and output. The pin configuration is as follows:

1. Mounting: Secure the SDR-480-48 to a DIN rail or a flat surface using the provided mounting brackets. Ensure adequate ventilation around the unit for proper cooling.
2. Input Connection:
   • 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. Output Connection:
   • Connect the load to the +V (Positive) and -V (Negative) terminals.
   • Ensure the load does not exceed the maximum output current of 10A.
4. Power On:
   • After verifying all connections, apply AC power to the input terminals.
   • The green LED indicator on the unit will light up, indicating normal operation.

• Input Voltage: Ensure the input voltage is within the specified range (90-264VAC). Operating outside this range may damage the unit.
• Load Regulation: Maintain the load within the rated output current (10A) to prevent overloading.
• Ventilation: Install the unit in a well-ventilated area to prevent overheating. Avoid obstructing the ventilation holes.
• Wiring: Use appropriately rated wires for both input and output connections to handle the current safely.
• Protection: The SDR-480-48 includes built-in protections, but external fuses or circuit breakers are recommended for additional safety.

The SDR-480-48 can be used to power an Arduino UNO and other peripherals. Below is an example wiring setup:

1. Connect the +V terminal of the SDR-480-48 to the VIN pin of the Arduino UNO.
2. Connect the -V terminal of the SDR-480-48 to the GND pin of the Arduino UNO.
3. Ensure the output voltage is set to 48V (default) and use a DC-DC step-down converter to reduce the voltage to 7-12V for the Arduino UNO.

// Example code to blink an LED connected to pin 13 of the Arduino UNO
// Ensure the SDR-480-48 is properly connected to the Arduino's 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:

   • Cause: Input power is not connected or is outside the specified range.
   • Solution: Verify the input voltage and connections to the L and N terminals.

2. Overload Protection Triggered:

   • Cause: The connected load exceeds the maximum output current (10A).
   • Solution: Reduce the load to within the rated output current.

3. Overheating:

   • Cause: Insufficient ventilation or operation in a high-temperature environment.
   • Solution: Ensure proper airflow around the unit and operate within the specified temperature range.

4. LED Indicator Off:

   • Cause: No input power or internal fault.
   • Solution: Check the input power and connections. If the issue persists, contact Mean Well support.

Q1: Can the SDR-480-48 be used in parallel with other power supplies?
A1: Yes, the SDR-480-48 supports parallel operation for increased power output. Follow the manufacturer's guidelines for proper configuration.

Q2: Is the output voltage adjustable?
A2: Yes, the output voltage can be adjusted within a range of 48-55V using the built-in potentiometer.

Q3: Can the SDR-480-48 be used in outdoor environments?
A3: The SDR-480-48 is designed for indoor use. For outdoor applications, ensure it is housed in a weatherproof enclosure.

Q4: What type of fuse should be used for input protection?
A4: Use a fuse rated for 10A at 250VAC for input protection.

By following this documentation, users can effectively integrate the Mean Well SDR-480-48 into their projects and ensure reliable operation.