Figure 3-11 Power supply by a built-in AC PoE power module
Motherboard
GND
12V
PWR
L N PGND
-53V RTN
L: live wire N: neutral wire PGND: protection
ground
GND: 12 V reference
ground
RTN: -53 V reference
ground
Heat Dissipation
The S5700-28P-PWR-LI-AC has built-in fans for forced air cooling. The airflow direction is
left-to-right.
1
2
3
4
MODE
STCK
SPED
STAT
SYS
RPS
PWR
Cold air
Hot air
NOTE
This figure only shows the airflow direction and does not depict the actual device.
Technical Specifications
Table 3-29 lists specifications of the S5700-28P-PWR-LI-AC.
Table 3-29 Technical specifications
Item
Description
Memory (RAM) 256 MB
Flash
l V200R001: 64 MB
l V200R002 and later versions: 200 MB
Mean time between
failures (MTBF)
44.24 years
Mean time to repair
(MTTR)
2 hours
S5700 Series Ethernet Switches
Hardware Description
3 Chassis
Issue 24 (2016-08-12) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
98
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