Ac Poe Power Supply Units; Function Overview; Panel - Huawei S5700 Series Hardware Description

S5700&S5710 Series Ethernet Switches
Hardware Description
Item
Rated input voltage range
Maximum input voltage
range
Maximum input current
Maximum output current
Rated output voltage
Maximum output power

2.7 AC PoE Power Supply Units

This section describes the functions, appearance, switch, indicators, and technical specifications
of the S5700 AC PoE power supply unit.

2.7.1 Function Overview

Power over Ethernet (PoE) refers to power supply over a 10Base-T, 100Base-TX, or 1000Base-
T twisted pair cable.
PoE provides power for terminals such as IP phones, access points (APs), portable device
chargers, point-of-sale (POS) machines, cameras, and data collectors. These terminals are
powered when they access the network, so the indoor power supply systems are not required.
Complying with IEEE 802.3af and IEEE 802.3at, the PoE S5700 is able to remotely provide
power for the devices of different vendors. IEEE 802.3af supports a maximum of 15.4 W power
and IEEE 802.3at supports a maximum of 30 W power.
The PoE function transmits power together with data to terminals over cables or transmits power
without data over idle lines. The S5700 can transmit power together with data at a rate of up to
1000 Mbit/s.

2.7.2 Panel

Two swappable PoE power supply unit types are 250 W PoE power supply units shown in
Figure
250 W PoE power supply unit is different from that of 500 W PoE power supply unit. The distinct
difference is the fan.
Issue 01 (2012-03-15)
2-10, and 500 W PoE power supply units shown in
NOTE
A 500 W AC PoE power supply unit is built in S5700-28P-PWR-LI-AC and S5700-52P-PWR-LI-AC.
They do not support swappable PoE power supply units.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
S5700-28C-HI
100 V AC to 240 V AC, 50/60 Hz
90 V AC to 264 V AC, 47 Hz to 63 Hz
2.5 A
14.2 A
12 V
170 W
2 Power Supply Unit
S5700-28C-HI-24S
Figure 2-11. The appearance of a
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