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電源供應器，香港俗稱為火牛。電源供應器是一種向電力負載提供電力的電器設備。電源供應器的主要功能是將電流從源頭轉換成正確的電壓、電流和頻率，為負載供電。因此，電源有時被稱為電力轉換器。從電源插座接收電源，並將電流從AC（交流）轉換為DC（直流），這就是電腦所需要的。將負載的電流限制在安全水平，在發生電氣故障時關閉電流，進行電源調節以防止輸入端的電子噪聲或電壓浪湧到達負載，進行功率因素校正，以及儲存能量以便在源電力暫時中斷的情況下繼續為負載供電（不間斷電源）。
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Regulated Output:DC13.8V/3A w/4 Output Port & Battery Charger, Input:AC200~240V, Size:210(W)x212(H)x..
Regulated Output:DC13.8V/5A w/4 Output Port & Battery Charger, Input:AC200~240V, Size:210(W)x212(H)x..
Switching Mode, Regulated Output:DC13.8V/10A, W/Battery Charger & Fault Output Relay, Input:AC100~24..
Input:AC230V, Output:AC12 or AC24V..
Output 1: Regulated DC12V 0.5A, Output 2: DC 12V 1A/2A, Timer 0～20sec, 100(W)x68(H)x160(D)mm, AC220V..
Output 1: Regulated DC12V 0.5A. Output 2: DC10 or 12V 1A/3A. Timer 0～20sec. 106(W)x70(H)x145(D)mm AC..
O/P 1: Regulated DC12V 0.5A, O/P 2: Regulated DC 8/10/13V 2A, Timer 0～30sec, With Battery Charger, 1..
Switching Mode. Regulated Output:DC13.8V 2.5A x 2. For Access Control & E.Lock Control(Timer 0~30sec..
AC Input:AC100~240V, Output 1:DC12V/1.0A For Keypad, Output 2:DC12V/1.5A For E.Lock, Timer 0～20sec.,..
Output:DC13.8V 5.0A For Access Control & E.Lock Control(Timer 0~30sec), W/Battery Charger, Input:AC1..
Regulated Output:DC13.8V/5A, W/Battery Charger, Input:AC100~240V, Size:210(W)x280(H)x80(D)mm &n..
6 Push Button Input, 6 Door Open Output & 6 LED Output For Door Open, 6 Sensor Input, Bypass Functio..
12Watts Switching Mode, Input: AC90~264V, Plastic Housing ..
12Watts Switching Mode, Input: AC90~264V, Plastic Housing ..
12Watts Switching Mode, Input: AC90~264V, Plastic Housing ..
Terminal Type, Output: 5V/3A, Input: AC100~240V, Plastic Housing ..
Terminal Type, Output: 12V/1.5A, Input: AC100~240V, Plastic Housing ..
Wire Type, Output: 12V/1.5A, Input: AC100~240V, Plastic Housing(Meets IP54) ..
Terminal Type, Output: 24V/0.75A, Input: AC100~240V, Plastic Housing ..
Wire Type, Output: 24V/0.75A, Input: AC100~240V, Plastic Housing(Meets IP54) ..
