Installation Manual
H3C S7500E Series Ethernet Switches
Chapter 1 Product Overview
1-3
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The two power modules, which sit in the upper part of the chassis provide 1+1
redundancy backup. See callout (1) in Figure 1-1. You can select either AC power
supply or DC power supply.
Figure 1-2 shows the rear panel of the S7502E.
(1) COM port for monitoring PoE (RS485)
(2) COM port for monitoring PoE (RS232)
(3) Grounding screws
(4) RTN terminal (+) of external PoE power
supply
(5) Negative terminal (–) of external PoE
power supply (–46 V to –55 V)
Figure 1-2
Rear panel of the S7502E
There are two DC power input (PoE power supply input) terminals and two COM ports
(monitor ports) on the rear panel of the chassis.
Note:
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The S7500E series are Power over Ethernet (PoE) capable, that is, they can supply
power to devices such as IP phones, wireless access points, and network cameras
connected to their Ethernet ports through twisted pair cables.
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For the S7502E and S7503E-S, the external PoE power supply is connected to the
PoE power supply input terminals on the rear panel, while for the other models of
the S7500E series, the external PoE power supply is connected to a power module.
For details, refer to section 1.2.3 VI. “PSR1400-D” on page 1-15 and section 1.2.3
VII. “PSR2800-ACV” on page 1-16.
II. S7503E-S
Figure 1-3 shows the front panel of the S7503E-S.