3Com LS8M1P12TEH Installation Manual page 20

Installation Manual
H3C S7500 Series Ethernet Switches
(1) Grounding screw
(3) Bail latch
(5) COM port (PSE monitoring port)
(7) NEG (-) terminal of the PoE power input
(9) Air filter
Figure 1-7 Rear view of the S7503 chassis (S7503-AC-XG-PoE chassis in the
example)
Caution:
The handle on the rear panel is used for removing or installing the rear panel of the
switch. It does not bear the weight of the whole switch. Thus, do not hold this handle
when handling or moving the switch. The same is true of the handles on the rear
panels of all the S7500 series.
A filler panel is installed in the power module slot marked with NULL in Figure 1-6
and no power module can be inserted into it.
Each area is hot-swappable.
In the board area, there are four horizontal slots. The topmost slot is for a required
SRPU and the other three are for optional LPUs.
The fan area is on the right of the chassis. The fan tray slot is vertical.
The power supply area is at the bottom of the chassis. The power modules work in
1+1 redundancy mode and they support dual AC or DC power supply. You can
select either AC power supply or DC power supply as required.
(2) Power switch of power distribution box
(4) Socket of AC power distribution box
(6) RTN (+) terminal of the PoE power input:
(8) Handle on the rear panel
1-14
Chapter 1 Product Overview