Working Mode Of Non-Poe Ac Power Supply Units; Working Mode Of Poe Ac Power Supply Units; Figure 2-2 Working Mode Of Non-Poe Ac Power Supply Units; Figure 2-3 Working Mode Of Poe Ac Power Supply Units - Huawei Quidway S3300 Series Hardware Description

2 Power Supply Unit
On a switch, after the DC power is transmitted to the PWR module, the PWR module outputs
12 V voltage, and provides power for the entire device.

2.2.2 Working Mode of Non-PoE AC Power Supply Units

The working mode of the S3300 non-PoE AC power supply units is shown in

Figure 2-2 Working mode of non-PoE AC power supply units

Motherboard
L: Live line
On a switch, after the AC power is transmitted to the PWR module, the PWR module outputs
12 V voltage, and provides power for the entire device.

2.2.3 Working Mode of PoE AC Power Supply Units

The working mode of S3300 PoE AC power supply units is shown in

Figure 2-3 Working mode of PoE AC power supply units

Motherboard
PWR1
L: Live line
After the PoE power is transmitted to the PWR module, the PWR module outputs 12 V and -53
V voltage, and then the motherboard provides 12 V voltage for the entire device and -53 V
voltage for the powered devices (PDs).
2-4
12V
PWR1
L N PGND
N: Neutral wire
-53V RTN
12V GND
PWR2
L N PGND L N PGND
N: Neutral wire PGND: PGND cable
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Quidway S3300 Series Ethernet Switches
GND
PGND: PGND cable
GND: Grounding
Hardware Description
Figure 2-2.
GND: Grounding
Figure 2-3.
RTN: Ground cable
Issue 01 (2011-01-30)