How to Use SDR-480P-48 48V DIN Power Supply: Examples, Pinouts, and Specs

The SDR-480P-48 is a high-performance, compact DIN rail power supply manufactured by Mean Well. It delivers a stable 48V DC output with a maximum power of 480W, making it ideal for industrial automation, control systems, and other demanding applications. Its high efficiency (up to 94%) and wide input voltage range ensure reliable operation in diverse environments. The SDR-480P-48 is designed to meet stringent industrial standards, offering robust protection features and long-term durability.

• Industrial automation and control systems
• Factory machinery and equipment
• Process control and monitoring
• Telecommunications and networking devices
• LED lighting systems
• Renewable energy systems

The SDR-480P-48 features screw terminal connections for input and output wiring. Below is the pin configuration:

1. Mounting: Securely mount the SDR-480P-48 on a DIN rail (TS-35/7.5 or TS-35/15).
2. Input Wiring:
   • Connect the AC live wire to the L terminal.
   • Connect the AC neutral wire to the N terminal.
   • Connect the earth wire to the FG terminal for proper grounding.
3. Output Wiring:
   • Connect the load's positive terminal to the +V terminal.
   • Connect the load's negative terminal to the -V terminal.
4. Voltage Adjustment (if needed):
   • Use the Trim potentiometer to fine-tune the output voltage within ±10% of 48V.
5. DC OK Signal:
   • Use the DC OK relay contact to monitor the output status. The relay is closed when the output is within the normal range.

• Ensure the input voltage is within the specified range (90-264V AC).
• Use appropriately rated wires for input and output connections to handle the current safely.
• Maintain adequate ventilation around the power supply to prevent overheating.
• Avoid exposing the unit to excessive moisture, dust, or corrosive environments.
• Use circuit breakers or fuses on the input side for added protection.
• Regularly inspect the connections to ensure they are secure and free from corrosion.

The SDR-480P-48 can power an Arduino UNO and other peripherals requiring 5V or 12V by using a DC-DC step-down converter. Below is an example setup:

1. Connect the +V and -V terminals of the SDR-480P-48 to the input of a DC-DC step-down converter.
2. Adjust the step-down converter to output 5V.
3. Connect the 5V output of the converter to the Arduino UNO's 5V and GND pins.

// Example Arduino code to blink an LED
// Connect an LED to pin 13 with a 220-ohm resistor

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 the SDR-480P-48 be used in outdoor environments?

   • No, the SDR-480P-48 is not weatherproof. Use it in a dry, indoor environment or within a suitable enclosure.

2. What is the purpose of the DC OK signal?

   • The DC OK signal provides a relay contact that indicates whether the output voltage is within the normal range. It can be used for monitoring or triggering alarms.

3. How do I reset the power supply after an overload?

   • Disconnect the load, power off the unit, and wait a few seconds. Then, reconnect the load and power it back on.

4. Can I connect multiple SDR-480P-48 units in parallel?

   • Yes, the SDR-480P-48 supports parallel operation for increased power output. Follow the manufacturer's guidelines for proper configuration.

By following this documentation, users can effectively integrate the SDR-480P-48 into their systems and troubleshoot common issues with ease.