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. Both DC
power modules and AC power modules support IIC communications.
Two AC power modules or two DC power modules work in 1+1 backup mode to improve the
reliability of power supply. Figure 1-32 shows the diagram of the power supply system.
Figure 1-32 Diagram of the power supply system
1.8.2.2 PEM
The PEM is a 48V DC power entry module.
Overview
Table 1-20 Power attributes
48V DC Power Entry Module
Table 1-21 Mapping products and versions
Earliest Software Version
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