3Com H3C S7503E-S CHASSIS Installation Manual page 16

Figure 1-9 Front panel of the S7506E-V
(6)
(5)
(4)
(1) Fan tray
(3) Jack for ESD-preventive wrist strap
(5) Air filter
All the modules of the switch are hot swappable.
The S7506E-V switch has eight vertical slots. SRPUs are inserted in the left two slots (see callout 5
in Figure 1-9). SRPUs are required and support active-standby switchover. Different LPUs are
inserted in the other six slots (see callout 2 in Figure 1-9).
The fan tray is installed above the SRPUs and LPUs (see callout 1 in Figure 1-9) and the air flows
up from the bottom.
The two power modules, which sit in the lower part of the chassis (see callout 4 in Figure 1-9),
provide 1+1 redundancy backup and support dual power supply inputs. You can select either AC
power supply or DC power supply.
(2) LPUs (in slot 2 to slot 7)
(4) Power module
(6) SRPUs (in slot 0 and slot 1)
1-9
(1)
(2)
(3)
(4)