MEAN WELL LRS-350-24 AC/DC Switching Power Supply User Manual

1. Produk Lebihview

The MEAN WELL LRS-350-24 is an AC/DC switching power supply designed to convert alternating current (AC) into stable direct current (DC) for various electronic applications. This unit provides a regulated 24V DC output with a maximum power of 350.4W and can deliver up to 14.6A. It features a wide operating temperature range of -30°C to 70°C, making it suitable for diverse environments. Key features include selectable AC input voltage, comprehensive protection mechanisms, and an intelligent cooling fan control system.

2. Maklumat Keselamatan

Please read all safety instructions carefully before installation and operation. Failure to follow these instructions may result in electric shock, fire, or damage to the unit.

• Ensure the power supply is disconnected from the main AC power source before any installation, wiring, or maintenance.
• Hanya kakitangan yang berkelayakan harus melakukan pemasangan dan pendawaian.
• Sahkan input voltage selection switch is set correctly for your region's AC supply (115VAC or 230VAC) before connecting power. Incorrect setting can cause severe damage.
• Do not operate the unit in environments exceeding its specified temperature and humidity limits.
• Pastikan pengudaraan yang betul di sekitar unit untuk mengelakkan terlalu panas. Jangan halang bukaan pengudaraan.
• Unit ini mengandungi vol tinggitage components. Do not open the casing unless specifically instructed by a qualified technician.
• Tanahkan unit dengan betul untuk mengelakkan kejutan elektrik.

3. Persediaan dan Pemasangan

3.1 Pemasangan

The LRS-350-24 power supply is designed for chassis mounting. Ensure adequate space for airflow, especially around the cooling fan and ventilation slots. Mount the unit securely using appropriate screws.

3.2 Sambungan Pendawaian

Refer to the terminal block diagram for correct wiring. Ensure all connections are secure and use appropriate wire gauges for the current ratings.

Rajah 1: Atas view of the LRS-350-24 power supply, illustrating the cooling fan, AC input voltage warning label, and the clearly labeled terminal block for input and output connections.

Rajah 2: bersudut view highlighting the terminal block for AC input (N, L, Ground) and DC output (+V, -V), along with the voltage adjustment potentiometer (V.ADJ).

• Input AC: Connect the Live (L) and Neutral (N) wires from your AC mains to the corresponding terminals. Connect the Earth Ground wire to the ground terminal (⏚).
• Output DC: Connect your load to the +V (positive) and -V (negative) terminals. The unit provides multiple output terminals for convenience.

4. Arahan Operasi

4.1 Input Voltage Pemilihan

The LRS-350-24 features a switch to select the AC input voltage range. This switch is typically located on the side of the unit.

Rajah 3: sebelah view of the power supply, clearly showing the red switch for selecting between 115V and 230V AC input. Ensure this is set correctly before powering on.

• Tetapkan suis kepada 115VAC for regions with 100-120VAC mains supply (e.g., North America).
• Tetapkan suis kepada 230VAC for regions with 200-240VAC mains supply (e.g., Europe, Asia).
• AMARAN: Input salah voltage selection will damage the unit. Always verify the setting before applying power.

4.2 Keluaran Voltage Pelarasan

Keluaran voltage can be finely adjusted within a range of 21.6V to 28.8V DC using the "V.ADJ" potentiometer located near the output terminals. Use a small screwdriver to carefully turn the potentiometer clockwise to increase voltage atau lawan jam untuk mengurangkan voltage. Pantau keluaran voltage dengan multimeter semasa pelarasan.

4.3 Sistem Penyejukan

The LRS-350-24 incorporates a built-in cooling fan with intelligent ON-OFF control. The fan activates when the internal temperature (RTH3) reaches approximately 50°C and turns off when the temperature drops below 40°C. This design optimizes fan life and reduces noise during lighter loads. Ensure the fan's intake and exhaust are not obstructed.

Rajah 4: Satu jarak dekat view showing the internal components through the ventilation slots, with an annotation pointing to where the LRS-350 PCB version can be identified. This area is crucial for internal cooling.

5. Penyelenggaraan

5.1 Penjagaan Am

• Keep the unit clean and free from dust and debris. Dust accumulation can hinder cooling and affect performance.
• Periodically inspect all wiring connections to ensure they are tight and free from corrosion.
• Pastikan persekitaran operasi kekal dalam julat suhu dan kelembapan yang ditetapkan.
• Do not expose the unit to moisture or corrosive substances.

6. Penyelesaian masalah

If the power supply is not functioning as expected, consider the following common issues:

• Tiada Keluaran Voltage:
  • Semak sama ada input AC voltage switch is set correctly (115VAC/230VAC).
  • Verify AC input power is present and connected securely.
  • Check for blown fuses in the AC input line (if applicable to your setup).
  • Ensure the load is not short-circuited.
• Keluaran Voltage Too Low/High:
  • Adjust the "V.ADJ" potentiometer to the desired voltage.
  • Ensure the load current does not exceed the maximum rated output current (14.6A). Overload protection may be active.
• Unit Terlalu Panas:
  • Ensure adequate ventilation around the power supply. Clear any obstructions from the fan and ventilation slots.
  • Verify the ambient temperature is within the specified operating range.
  • Reduce the load if it is consistently near or above the maximum rated power.
• Kipas Tidak Berjalan:
  • The fan is temperature-controlled. It will only activate when the internal temperature reaches approximately 50°C. If the unit is cool, the fan will remain off.
  • If the unit is hot and the fan is not running, check for obstructions or contact support.

For issues not resolved by these steps, please contact qualified technical support.

7. Spesifikasi

8. Waranti dan Sokongan

8.1 Maklumat Waranti

Specific warranty details for the MEAN WELL LRS-350-24 power supply are typically provided by the retailer or manufacturer at the time of purchase. Please refer to your purchase documentation or the official MEAN WELL weblaman web ini untuk terma dan syarat jaminan yang paling tepat dan terkini.

8.2 Sokongan Pelanggan

For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact your point of purchase or visit the official MEAN WELL webtapak untuk sumber sokongan dan maklumat hubungan.

Official MEAN WELL Webtapak: www.meanwell.com