Dc Power Supply Units; Function Overview; Panel; Figure 2-3 Working Mode Of Poe Ac Power Supply Units - Huawei Quidway S5300 Series Hardware Description

Quidway S5300 Series Ethernet Switches
Hardware Description

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).

2.3 DC Power Supply Units

This section describes the functions, appearance, switch, indicators, and technical specifications
of the S5300 DC power supply unit.

2.3.1 Function Overview

2.3.2 Panel

2.3.3 Technical Specifications
2.3.1 Function Overview
The 150 W DC power supply unit provides +12 V DC power. It has the following functions:
l
l
2.3.2 Panel
Issue 01 (2011-01-30)
-53V RTN
12V
PWR2
L N PGND
N: Neutral wire
EMC filtering, surge protection, and short circuit protection.
Various alarms, for example, the alarm triggered when there is no power input, the alarm
for air breaker status, the alarm for invalid surge protection, and the alarm for undervoltage
input.
NOTE
Only S5328C-EI, S5328C-EI-24S, S5352C-EI, S5328C-SI, and S5352C-SI support the 150 W DC power
supply unit.
NOTE
The power supply units of S5324TP-SI and S5348TP-SI are integrated on the switch control unit (SCU).
They do not support power modules. The functions of the power supply unit switch are the same as the
functions of the power module switch. The power supply units of S5324TP-SI and S5348TP-SI do not
have the status indicators. For the status and meanings of power indicators, see the PWR indicator
description in section 6.1 Indicators on the Front
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GND
L N PGND
PGND: PGND cable
Panel.
2 Power Supply Unit
GND: Grounding RTN: Ground cable
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