5-19
Chapter 5: Chassis Setup and Maintenance
Four fans provide cooling for the chassis. These fans circulate air through the chas-
sis as a means of lowering the chassis internal temperature. The SC827 system fans
are easy to change modules. There is no need to uninstall any other parts inside
the system when replacing fans, and no tools are required for installation.
Optional Fan Congurations
The SC827H model chassis is designed so that the default conguration of the
system is for each motherboard to control two fans. Each motherboard node in
the chassis is connected to the backplane through the adapter card, mounted in
the motherboard node drawer. In the event that one of the motherboard drawers is
removed, then the remaining motherboard will operate both fans.
The SC827T model chassis has a default conguration with one fan wired directly
to each motherboard. In the event that one of the motherboard drawers is removed,
then the fan associated with that motherboard will not function until the drawer is
replaced. If multiple controls are desired in the SC827T, an optional cable must be
purchased separately to connect from the backplane to each motherboard node.
Fan Congurations Options
SC827T Default Conguration
Fan A wired directly to Node A
Fan B wired directly to Node B
Fan C wired directly to Node C
Fan D wired directly to Node D
SC827T Optional Hot-Swappable Conguration (Requires optional cable)
Fans A and B connected to backplane,
backplane cabled to Nodes A and B
Fans A and B connected to backplane,
backplane cabled to Nodes A and B
SC827H Hot-Swappable Default Conguration
Fans A and B connected to backplane,
backplane connected to Node A and B by adapter card
Fans C and D connected to backplane,
backplane connected to Nodes A and B by adapter card
5-9 System Fans
