NOTE
When an S5700-52P-PWR-LI-AC switch of V200R001 connects to an RPS1800, the RPS1800 only
provides PoE power backup and does not increase the switch's PoE power.
Figure 3-17 shows the power supply mode of a built-in AC PoE power module (PWR). The
PWR module receives AC power from an external power source and provides two outputs: 12
V and -53 V. The 12 V output is provided for the chassis, and the -53 V output is provided for
PDs.
Figure 3-17 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 S5700-52P-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 3-45 lists technical specifications of the S5700-52P-PWR-LI-AC.
Table 3-45 Technical specifications
Item
Description
Memory (RAM) 256 MB
S5700 Series Ethernet Switches
Hardware Description
3 Chassis
Issue 24 (2016-08-12) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
113
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