How to Use MEAN WELL DRS-480-48: Examples, Pinouts, and Specs

The MEAN WELL DRS-480-48 is a high-performance 480W, 48V DC-DC power supply designed for industrial applications. It offers high efficiency, a compact form factor, and robust reliability. This power supply is equipped with built-in protections against overvoltage, overcurrent, and short circuits, making it ideal for demanding environments. Its versatility and durability make it suitable for use in industrial automation, telecommunications, and renewable energy systems.

• Industrial automation systems
• Telecommunications equipment
• Renewable energy systems (e.g., solar or wind power setups)
• Battery charging systems
• LED lighting systems
• Test and measurement equipment

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

1. Input Connection: Connect the DC input voltage (33V to 60V) to the +V IN and -V IN terminals. Ensure the input voltage is within the specified range to avoid damage.
2. Output Connection: Connect the load to the +V OUT and -V OUT terminals. Verify that the load does not exceed the maximum output power of 480W.
3. Grounding: Connect the GND terminal to the system ground for safety and noise reduction.
4. Remote Control: Use the Remote ON/OFF pin to enable or disable the output remotely. This can be controlled using a switch or a microcontroller.

• Cooling: Ensure adequate ventilation around the power supply to maintain optimal operating temperatures.
• Wiring: Use appropriately rated wires for the input and output connections to handle the current safely.
• Polarity: Double-check the polarity of the input and output connections to prevent damage.
• Load Regulation: Avoid sudden changes in load that exceed the power supply's dynamic response capabilities.
• Mounting: Secure the power supply in a stable position to prevent vibration or movement during operation.

The DRS-480-48 can be used to power an Arduino UNO and other peripherals. Below is an example of how to connect it:

1. Connect the +V OUT terminal to the Arduino's VIN pin.
2. Connect the -V OUT terminal to the Arduino's GND pin.
3. Ensure the output voltage is set to 48V and use a step-down converter if the Arduino requires a lower voltage (e.g., 5V).

// This code demonstrates how to control the Remote ON/OFF pin of the
// MEAN WELL DRS-480-48 using an Arduino UNO. The pin is toggled every
// 5 seconds to enable and disable the power supply output.

const int remoteControlPin = 7; // Pin connected to Remote ON/OFF terminal

void setup() {
  pinMode(remoteControlPin, OUTPUT); // Set the pin as an output
  digitalWrite(remoteControlPin, LOW); // Start with the power supply OFF
}

void loop() {
  digitalWrite(remoteControlPin, HIGH); // Turn ON the power supply
  delay(5000); // Wait for 5 seconds
  digitalWrite(remoteControlPin, LOW); // Turn OFF the power supply
  delay(5000); // Wait for 5 seconds
}

1. No Output Voltage

   • Cause: Input voltage is out of range or improperly connected.
   • Solution: Verify the input voltage is within the 33V to 60V range and check the polarity.

2. Overload Protection Triggered

   • Cause: Load exceeds the maximum output power of 480W.
   • Solution: Reduce the load to within the power supply's capacity.

3. Overheating

   • Cause: Insufficient ventilation or operation in a high-temperature environment.
   • Solution: Improve airflow around the power supply or reduce the ambient temperature.

4. Remote ON/OFF Not Working

   • Cause: Incorrect wiring or control signal.
   • Solution: Verify the connection to the Remote ON/OFF pin and ensure the control signal is within the required voltage range.

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

Q: Is the output voltage adjustable?
A: No, the output voltage is fixed at 48V.

Q: What type of loads can the DRS-480-48 handle?
A: The power supply can handle resistive, inductive, and capacitive loads, provided they are within the specified power and current limits.

Q: Does the DRS-480-48 have built-in EMI filtering?
A: Yes, the power supply includes built-in EMI filtering to reduce electromagnetic interference.