Figure 3-28 Power supply by a single DC power module
Motherboard
GND12V
PWR
NEG RTN
NEG: negative cable RTN: positive cable GND: 12 V reference ground
Heat Dissipation
The S5700-28X-LI-DC 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 3-74 lists technical specifications of the S5700-28X-LI-DC.
Table 3-74 Technical specifications
Item
Description
Memory (RAM) 256 MB
Flash 200 MB
Mean time between
failures (MTBF)
68.95 years
Mean time to repair
(MTTR)
2 hours
Availability > 0.99999
Service port surge
protection
Common mode: ±6 kV
S5700 Series Ethernet Switches
Hardware Description
3 Chassis
Issue 24 (2016-08-12) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
146
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