Poe Features Supported By S7500; External Pse2500-A1 Power System - H3C S7500 Series Operation Manual

Operation Manual – PoE
H3C S7500 Series Ethernet Switches

1.1.2 PoE Features Supported by S7500

S7500 series Ethernet switches (hereinafter referred to as S7500 series) support PoE.
Equipped with external power supply and PoE-enabled boards, S7500 series can
provide –48 VDC power to remote PDs through twisted pairs.
The S7500 series support IEEE802.3af standard. They can also supply power to
PDs noncompliant with the standard.
The power supply of the S7500 series is administered by the main control board;
each PoE board on the switch can be viewed as a PSE and administers the power
supply of all the ports on it independently.
The S7500 series can deliver data and current simultaneously through data wires
(1, 3, 2, and 6) of category-3/5 twisted pairs.
The S7500 series supply power through the Ethernet electrical ports on the
service boards. Each service board can supply power to up to 48 remote devices
at the maximum distance of 100 m (328 feet).
Each Ethernet port can supply at most a power of 15.4 W to remote PDs.
When the S7500 series supply power to remote devices, the maximum total power
that it can provide is 2,400 W. The switch determines whether to supply power to
the next remote PD it discovers depending on the total power it currently supplies.
Note:
When the PoE-enabled S7500 series supply power to remote PDs, the PDs need
not have any external power supply.
If a remote PD has an external power supply, the PoE-enabled S7500 series and
the external power supply will be redundant with each other for the PD.

1.1.3 External PSE2500-A1 Power System

If PSE2500-A1 power system is taken as the external power supply, the power is
distributed as follows:
1) Input voltage: 100 VAC to 140 VAC
One power supply unit (PSU) of the PSE2500-A1 power system can supply 1,250
W of power, and two PSUs can supply up to 2,400 W of power.
If the PSUs of PSE2500-A1 power system need to work in redundancy mode,
three PSUs are required and they work together to supply 2,400 W of power.
2) Input voltage: 200 VAC to 240 VAC
One PSU of the PSE2500-A1 power system can supply 2,500 W of power.
If the PSUs of PSE2500-A1 power system need to work in redundancy mode, two
PSUs are required.
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Chapter 1 PoE Configuration