AC Input Line Connection:

The pin of AC line (L), ac neutral (N), and the third wire safety ground (FG) should be retained from the AC power outlet to the power supply input terminals without accidental interchange. (Figure 1.1)
 (Figure 1.1)

The FG pin should be connected to the equipment where power supply is placed as thicker and shorter to protect electric shock or noise interference. (Figure 1.2)
(Figure 1.2)

Fuse:

To add a fuse at the input terminals of the power supply to provide safety and protection. We suggest using a 1.5A slow blow fuse for our AC-DC Converters including AHC, APC, ATC, ANC and ASC series. (Figure 2.1)
 (Figure 2.1)

Series and parallel operation:

I. Series operation Most power converters can be operated in series if they have overload limitation by either constant current or constant power circuits. To protect each output from the reverse voltage applied by the other unit in the event of load short circuits, reverse biased diodes are used as shown in Figure 3.1
(Figure 3.1)

II. Parallel operation This is only recommended with power converters specifically designed for parallel connection. In the parallel redundant scheme illustrated in Figure 3.2 one of the power converters could be replaced by a battery followed by a DC-DC converter to provide a no-break power system in the event of main supply failure.
 (Figure 3.2)

Reduce the output ripple and noise:

Using a LC filter or a Capacitor reduces the output ripple and noise. (Figure 4.1)
 (Figure 4.1)