1.8.5 NE40E-X16 Power Supply System
1.8.5.1 Architecture of the Power Supply System
The NE40E-X16 supports either DC or AC power supply.
DC power supply
In the case of a DC power supply system, eight 70 A Power Entry Modules (PEMs) are
inserted at the rear of the chassis, working in 4+4 backup mode. Figure 1-54 shows details of
the DC power supply system.
In Figure 1-54, each DC power input contains one -48 V power input and one RTN input. Two separated
RTN inputs are joined on the board.
PEM A1 and PEM B1 work in 1+1 backup mode, PEM A2 and PEM B2 work in 1+1 backup mode,
PEM A3 and PEM B3 work in 1+1 backup mode, PEM A4 and PEM B4 work in 1+1 backup mode.
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