1.8 Power
1.8.1 NE40E-X3 Power Supply System
1.8.1.1 Architecture of the Power Supply System
The NE40E-X3 supports either DC or AC power supply.
Power modules convert the input voltage into -48 V DC voltage to supply power for the entire
system. The power supply system has the following features:
The power supply system consists of two AC power modules or two DC power modules
working in 1+1 backup mode.
Both AC power modules and DC power modules support alarm functions. DC power
modules support I
2
C communications and AC power modules support RS485
communications.
Two AC power modules or two DC power modules work in 1+1 backup mode to improve the
reliability of power supply. Figure 1-30 shows the power supply system.
Figure 1-30 Diagram of the DC power supply system
1.8.1.2 PEM
The PEM is a 48V DC power entry module.
Overview
Table 1-14 Power attributes
48V DC Power Entry Module
Table 1-15 Mapping products and versions
Earliest Software Version
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