Heat Dissipation - Huawei S6700 Series Hardware Description

S6700 Series Ethernet Switches
Hardware Description
S6720-EI Power Supply Configuration
An S6720-EI switch can have one or two power modules installed.
When a switch has two power modules installed, the two power modules work in 1+1 redundancy
mode. AC and DC power modules can be used together in the same switch.
Figure 2-11
is transmitted to the PWR module, the PWR module provides 12 V output voltage, and the
motherboard provides power for the entire device.
Figure 2-11 Power supply connections of dual DC power modules
Motherboard
PWR2
NEG: Negative cable
Figure 2-12
AC power is transmitted to the PWR module, the PWR module provides 12 V output voltage,
and the motherboard provides power for the entire device.
Figure 2-12 Power supply connections of dual non-PoE AC power modules
Motherboard
PWR2
L: Live wire

2.5.6 Heat Dissipation

Table 2-21
Issue 12 (2015-07-31)
shows the power supply connections of dual DC power modules. After DC power
12V GND
PWR1
NEG RTN NEG RTN
RTN: Positive cable
shows the power supply connections of dual non-PoE AC power modules. After
12V GND
PWR1
L N PGND
N: Neutral wire PGND: Protective ground wire
lists the heat dissipation method of the S6720-EI series switches.
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GND: 12 V reference ground
L N PGND
2 Chassis
GND: 12 V reference ground
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