Installation Manual
H3C S7500E Series Ethernet Switches
Chapter 3 Hardware Installation
3-11
Note:
z
When you use PSR1400-D modules to provide PoE supply to attached devices and
there are more than three PoE-capable LPUs in the switch, you are recommended
to use 0AWG cables with a cross section area of 50 mm
2
to ensure the steady and
safe operation of the switch.
z
If customer-supplied PoE power cables are used as PoE power input cables for the
S7502E and the S7503E-S, you should ensure that the cables can bear a current of
50 A and have a minimum cross section area of 8.4 mm
2
.
An external PoE power supply can be connected to the PoE input terminals on the rear
panel of the S7502E and the S7503E-S with the delivered cables.
Figure 3-12 shows the rear panel of the S7502E and the S7503E-S.
(1) COM port for monitoring PoE (RS485)
(2) COM port for monitoring PoE (RS232)
(3) Air filter (optional)
(4) Grounding screw
(5) RTN (+) terminal for external PoE power module
(6) NEG (-) terminal (–46 V to –55 V) for external PoE power module
Figure 3-12
Rear panel of the S7502E
Figure 3-13 shows the rear panel of an external PoE power supply.
Figure 3-13
Rear panel of an external PoE power supply (PSE2500-A3)
Follow these steps to connect the PoE power cables:
