Figure 11: Vertical Fan Tray - Juniper PTX5000 Hardware Manual

PTX5000 Packet Transport Router Hardware Guide
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Figure 11: Vertical Fan Tray

FAN TRA
Y
PTX
VER TIC
AL
Cooling zone 1—The upper
of which contain six fans, cool the components installed in the front card cage (FPCs
and PICs), and the CCGs. Both horizontal fan trays are interchangeable with each other.
Cooling zone 1 has two sections:
Cooling zone 1 section 1 cools FPCs 0 through 4.
Cooling zone 1 section 2 cools FPCs 3 through 7.
NOTE: FPCs 3 and 4 can be cooled by either cooling zone 1 section.
When FPCs are installed in a section, the software sets the fan speeds according to
the temperature. When no FPCs are installed in cooling zone 1 section 1, the left fans
in the horizontal fan trays in cooling zone 1 are set to 34% of maximum speed. When
no FPCs are installed in cooling zone 1 section 2, the right fans in the horizontal fan
trays in cooling zone 1 are set to 34% of maximum speed.
and lower
Fan Tray 1 Fan Tray 2
horizontal fan trays, each
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