Working Mode Of Poe Ac Power Supply Units - Huawei S5700 Series Hardware Description

S5700&S5710 Series Ethernet Switches
Hardware Description
Figure 2-2 Working mode of Non-PoE AC power supply units
Motherboard
PWR1
L: Live line
After the AC power is transmitted to the PWR module except S5700-6TP-LI-AC, S5700-24TP-
SI-AC, S5700-48TP-SI-AC, S5700-52P-LI-AC, S5700S-52P-LI-AC, S5700-28P-LI-AC and
S5700S-28P-LI-AC, the PWR module outputs 12 V voltage, and then the motherboard provides
power for the entire device.
Figure 2-3 Working mode of a non-PoE AC power supply unit that functions alone
Motherboard
L: Live line
on the S5700-6TP-LI-AC, S5700-24TP-SI-AC, S5700-48TP-SI-AC, S5700-52P-LI-AC,
S5700S-52P-LI-AC, S5700-28P-LI-AC and S5700S-28P-LI-AC, after the AC power is
transmitted to the PWR module, the PWR module outputs 12 V voltage, and provides power for
the entire device.

2.2.3 Working Mode of PoE AC Power Supply Units

The working mode of S5700 PoE AC power supply units is shown in
2-5.
Issue 01 (2012-03-15)
12V GND
PWR2
L N PGND L N PGND
N: Neutral wire
12V
PWR1
L N PGND
N: Neutral wire
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Copyright © Huawei Technologies Co., Ltd.
PGND: PGND cable
GND
PGND: PGND cable
2 Power Supply Unit
GND: Grounding
GND: Grounding
Figure 2-4 and Figure
27