Power Supply Unit Working Mode; Working Mode Of Dc Power Supply Units; Figure 2-1 Working Mode Of Dc Power Supply Units - Huawei Quidway S3300 Series Hardware Description

Quidway S3300 Series Ethernet Switches
Hardware Description

2.2 Power Supply Unit Working Mode

This section describes the working mode of S3300 power supply units.

2.2.1 Working Mode of DC Power Supply Units

2.2.2 Working Mode of Non-PoE AC Power Supply Units
2.2.3 Working Mode of PoE AC Power Supply Units
2.2.1 Working Mode of DC Power Supply Units

Figure 2-1 Working mode of DC power supply units

Motherboard
NEG: Power cable
Issue 01 (2011-01-30)
Power Supply Unit
250 W current -
sharing power
supply
500 W current -
sharing power
supply
250 W current 250 W current
sharing power sharing power
supply supply
500 W current 500 W current
sharing power sharing power
supply supply
NOTE
Current sharing indicates that the power of two power supply units can be accumulated for powered devices
(PDs). The power for the device cannot be accumulated.
When two power supply units are used, they work in redundancy backup mode to provide power for the
device and in load balancing mode to provide power for PDs.
PWR1
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
PoE Power
123.2 W
369.6 W
246.4 W
739.2 W
12V GND
NEG RTN
RTN: Ground cable
2 Power Supply Unit
Maximum Number of
Interfaces
l 802.3af: 8
l 802.3at: 4
l 802.3af: 24
l 802.3at: 12
l 802.3af: 16
l 802.3at: 8
l 802.3af: 48
l 802.3at: 24
GND: Grounding
2-3