Power Supply Unit Working Mode; Working Mode Of Dc Power Supply Units; Working Mode Of Non-Poe Ac Power Supply Units - Huawei S5700 Series Hardware Description

S5700&S5710 Series Ethernet Switches
Hardware Description
When two power supply units are used, they work in 1:1 backup mode to provide power for the
device.

2.2 Power Supply Unit Working Mode

This section describes the working mode of S5700 power supply units.

2.2.1 Working Mode of DC Power Supply Units

The working mode of the S5700 DC power supply units is shown in
Figure 2-1 Working mode of DC power supply units
Motherboard
PWR1
NEG: Power cable
After the DC power is transmitted to the PWR module, the PWR module outputs 12 V voltage,
and then the motherboard provides power for the entire device.

2.2.2 Working Mode of Non-PoE AC Power Supply Units

The working mode of the S5700 Non-PoE AC power supply units is shown in
Figure
Issue 01 (2012-03-15)
NOTE
l The power supply units of S5700-6TP-LI-AC, S5700-24TP-SI-AC, S5700-24TP-SI-DC, S5700-48TP-
SI-AC, S5700-48TP-SI-DC, S5700-52P-LI-AC, S5700-52P-LI-DC, S5700S-52P-LI-AC, S5700-28P-
LI-AC, S5700-28P-LI-DC, S5700S-28P-LI-AC, S5700-28P-PWR-LI-AC and S5700-52P-PWR-LI-
AC are not hot swappable.
l The S5700-24TP-SI-AC, S5700-24TP-SI-DC, S5700-48TP-SI-AC, S5700-48TP-SI-DC, S5700-52P-
LI-AC, S5700-52P-LI-DC, S5700S-52P-LI-AC, S5700-28P-LI-AC, S5700-28P-LI-DC, S5700S-28P-
LI-AC, S5700-28P-PWR-LI-AC and S5700-52P-PWR-LI-AC support redundancy power supply
(RPS).
l The AC power supply and the DC power supply can be configured on an S5700-28C-HI or S5700-28C-
HI-24S.
12V
PWR2
NEG RTN
2-3.
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GND
NEG RTN
RTN: Ground cable
2 Power Supply Unit
Figure 2-1.
GND: Grounding
Figure 2-2 and
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