明緯 LRS-350-24 AC/DC 開關電源使用手冊

1. 產品結束view

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. 安全訊息

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.
• 只有合格人員才能進行安裝和佈線工作。
• 驗證輸入量tage selection switch is set correctly for your region's AC supply (115VAC or 230VAC) before connecting power. Incorrect setting can cause severe damage.
• 請勿在超出其規定溫度和濕度限制的環境中操作本機。
• 確保設備周圍通風良好，防止過熱。請勿堵塞通風口。
• 該單元包含高音量tage components. Do not open the casing unless specifically instructed by a qualified technician.
• 將本機正確接地以防止觸電。

3. 設定與安裝

3.1 安裝

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 接線連接

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

圖1： 頂部 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.

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

• 交流輸入： 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 (⏚).
• 直流輸出： Connect your load to the +V (positive) and -V (negative) terminals. The unit provides multiple output terminals for convenience.

4. 操作說明

4.1 輸入音量tag電子選擇

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.

圖3： 邊 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.

• 將開關設置為 115VAC for regions with 100-120VAC mains supply (e.g., North America).
• 將開關設置為 230VAC for regions with 200-240VAC mains supply (e.g., Europe, Asia).
• 警告： 輸入音量不正確tage selection will damage the unit. Always verify the setting before applying power.

4.2 輸出音量tag調整

輸出音量tage 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 或逆時針可減少音量tage. 監控輸出音量tag調整過程中使用萬用電表進行測量。

4.3冷卻系統

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.

圖4： 特寫 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、維護保養

5.1一般護理

• Keep the unit clean and free from dust and debris. Dust accumulation can hinder cooling and affect performance.
• 定期檢查所有線路連接，確保連接牢固且無腐蝕。
• 確保操作環境保持在規定的溫度和濕度範圍內。
• Do not expose the unit to moisture or corrosive substances.

6。 故障排除

如果電源無法正常運作，請考慮以下常見問題：

• 無輸出音量tage:
  • 檢查交流輸入電壓是否tage 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.
• 輸出量tage 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.
• 機組過熱：
  • Ensure adequate ventilation around the power supply. Clear any obstructions from the fan and ventilation slots.
  • 確認環境溫度在規定的工作範圍內。
  • Reduce the load if it is consistently near or above the maximum rated power.
• 風扇不運轉：
  • 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. 規格

8. 保固和支持

8.1 保固信息

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 website for the most accurate and up-to-date warranty terms and conditions.

8.2 客戶支持

For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact your point of purchase or visit the official MEAN WELL web提供支援資源和聯絡資訊的網站。

Official MEAN WELL Web地點： www.meanwell.com