1. Introduction
This manual provides essential instructions for the safe and efficient installation, operation, and maintenance of your MEAN WELL LRS-50-24 Switching Power Supply. Please read this manual thoroughly before installation and retain it for future reference. The LRS-50-24 is a single-output, 24V, 2.2A, 52.8W power supply designed for various industrial and electronic applications.
2. Safety Instructions
Improper installation or use can lead to electric shock, fire, or damage to the unit. Observe the following safety precautions:
- Ensure all wiring is performed by qualified personnel in accordance with local electrical codes.
- Disconnect power before performing any installation, wiring, or maintenance.
- Do not operate the unit in environments with excessive moisture, dust, or extreme temperatures outside its specified range.
- Ensure proper grounding of the unit.
- Do not open the power supply casing; there are no user-serviceable parts inside.
- Verify input voltage selection switch (if present) is set correctly before applying power.
- Ensure adequate ventilation around the unit to prevent overheating.
3. Product Overview
3.1 Key Features
- AC input range selectable by a switch.
- Withstands 300Vac surge input for 5 seconds.
- No-load power consumption less than 0.5W.
- Miniature size and 1U low profile design.
- High operating temperature capability up to 70°C.
3.2 Technical Specifications
| Specification | Value |
|---|---|
| Model Number | LRS-50-24 |
| Output Voltage | 24V DC |
| Output Current | 2.2A |
| Output Power | 52.8W |
| Input Voltage Range | AC input range selectable by switch (e.g., 85-264VAC) |
| Power Source | AC/DC |
| Mounting Type | Chassis Mount |
| Product Dimensions (L x W x H) | 3.9" x 3.23" x 1.18" (99mm x 82mm x 30mm) |
| Operating Temperature | Up to 70°C |
3.3 Product Views
Figure 1: Top-down view of the LRS-50-24 power supply, highlighting the terminal block for connections and the protective metal casing with ventilation holes.
Figure 2: Angled view of the LRS-50-24 power supply, showing the side profile and the top ventilation grille, indicating its compact form factor.
Figure 3: Detailed top view of the LRS-50-24 power supply, clearly showing the product label with input/output specifications and regulatory markings.
4. Installation and Setup
Follow these steps for proper installation:
- Mounting: Securely mount the LRS-50-24 power supply to a chassis or suitable surface using appropriate screws. Ensure adequate clearance for ventilation, especially above and around the unit.
- Input Voltage Selection: Locate the AC input voltage selection switch on the unit. Set it to the correct voltage (e.g., 115V AC or 230V AC) corresponding to your local mains supply. ⌂ Failure to set this correctly can damage the unit.
- AC Input Wiring: Connect the AC mains input wires to the designated terminals (L for Live, N for Neutral, ⌂ for Ground). Use appropriate gauge wiring for the current rating. Ensure connections are tight and secure.
- DC Output Wiring: Connect your load to the DC output terminals (+V for positive, -V for negative). Observe correct polarity. Ensure the total current drawn by your load does not exceed 2.2A.
- Voltage Adjustment: The unit may feature a potentiometer for fine-tuning the output voltage. If adjustment is required, use a small screwdriver to carefully turn the potentiometer. Monitor the output voltage with a multimeter during adjustment. The voltage can typically be adjusted from 20.5V to 27.5V.
- Final Check: Before applying power, double-check all connections for correctness, polarity, and security. Ensure no loose wires are present.
5. Operating Instructions
Once installed and wired correctly:
- Apply AC power to the unit. The power supply will begin to deliver 24V DC output.
- Monitor the connected load to ensure it operates as expected.
- The unit is designed for continuous operation within its specified temperature and load limits.
- Avoid exceeding the maximum output current of 2.2A to prevent damage to the power supply.
6. Maintenance
The LRS-50-24 power supply requires minimal maintenance:
- Cleaning: Periodically inspect the unit for dust accumulation, especially on the ventilation grille. Disconnect power and use a soft, dry brush or compressed air to gently clean the surfaces. Do not use liquid cleaners.
- Inspection: Regularly check wiring connections for tightness and signs of wear or damage. Ensure the mounting remains secure.
- Ventilation: Ensure that the ventilation openings are not obstructed to maintain proper airflow and prevent overheating.
7. Troubleshooting
If you encounter issues, consider the following:
- No Output Power:
- Check if AC input power is present and connected correctly.
- Verify the input voltage selection switch is set to the correct voltage.
- Inspect input and output wiring for loose connections or breaks.
- Check for any tripped circuit breakers or blown fuses in the AC supply line.
- Incorrect Output Voltage:
- Measure the output voltage with a multimeter.
- Adjust the voltage trim potentiometer if the voltage is slightly off.
- Ensure the load is not drawing excessive current, which could cause voltage drop.
- Overheating:
- Ensure adequate ventilation and clearance around the unit.
- Verify the ambient temperature is within the specified operating range.
- Check if the load current exceeds the maximum rated output.
If problems persist after following these steps, contact technical support.
8. Warranty and Support
MEAN WELL products are manufactured to high-quality standards. For warranty information and technical support, please refer to the official MEAN WELL website or contact your authorized distributor. Keep your purchase receipt as proof of purchase.
