Heat Dissipation - Huawei S2720 Series Hardware Description

S2720&S2750 Series Ethernet Switches
Hardware Description
Figure 2-10 PoE power supply by a single AC power module
Motherboard
L: Live wire N: Neutral wire PGND: Protective ground
Non-PoE Power Supply Configuration
The non-PoE models in the S2720&S2750 series use internal power modules and do not support
pluggable power modules.
Figure 2-11
module (PWR) receives power from an external power source and provides a 12 V output to the
chassis.
Figure 2-11 Power supply by a single AC power module on a non-PoE model
Motherboard
L: Live wire

2.3.6 Heat Dissipation

Table 2-10
Issue 08 (2015-02-12)
-53V RTN
12V
PWR
wire
shows the power supply connections on the non-PoE models. An internal AC power
12V
PWR
N: Neutral wire PGND: Protective ground wire
lists the heat dissipation methods of the S2720&S2750 series switches.
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GND
L N PGND
GND: 12 V reference
ground
GND
L N PGND
2 Chassis
RTN: -53 V reference
ground
GND: 12 V reference ground
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