The NE40E-X8 uses the technology of switched-mode power supply. The backplane has two areas, each of which has two power inputs, implementing backup. See Figure 1.
Figure 1 Power supply of the NE40E-X8
Generally, the NE40E-X8 has four AC power inputs, as shown in Figure 2.
Figure 2 AC power inputs of the NE40E-X8
Four DC outputs of the AC PDB are connected to the PEM to supply power to the left and right areas of the NE40E-X8.See Figure 3.
Figure 3 Connection between the AC PDB and the PEM on the NE40E-X8
Although the NE40E-X8 can work normally even when two AC power inputs are converted into two DC power inputs, there is no backup power supply in the left and right areas. Once one of the AC power supplies is faulty, no power supply is available in the corresponding area, causing services to be interrupted.