Huawei OptiX OSN 8800 Hardware Description page 29

OptiX OSN 8800/6800/3800
Hardware Description
Figure 4-9 Functional block diagram of the fan tray assembly
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Appearance
Figure 4-10
Figure 4-10 Fan tray assembly
1. Air filter
Issue 01 (2016-03-10)
FAN: dissipates heat generated by normal operation of the subrack. FAN is the core of
the fan tray assembly.
Fan control board:
Controls the fan speed according to the fan speed regulating signals.
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Detects faults. After a fault is detected, the fan control board reports an alarm. In
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this case, the SCC board issues commands to instruct the other fans to run at the full
speed.
Monitors speed regulating signals, the fan status, and the online/offline state of the
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fan tray assembly.
Receives and carries out commands from the SCC board to shut down the fans on
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the fan tray assembly if necessary.
shows a fan tray assembly.
2. Operating status indicators
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4 OptiX OSN 8800 Subrack
3
2
1
3. Fans (three in total)
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