Specifications

62 IBM Flex System p260 and p460 Planning and Implementation Guide

3.5.2 Switch and Chassis Management Module cooling

There are two additional cooling zones for the I/O switch bays. These zones,

zones 3 and 4, are on the right and left side of the bays, as viewed from the rear

of the chassis. Cooling zones 3 and 4 are serviced by 40 mm fan modules that

are included in the base configuration and cool the four available I/O switch bays.

Upon hot-swap removal of a 40 mm fan module, an opening is exposed to the

80 mm fan modules located below, and a back flow damper in the fan bay

closes. The backflow damper prevents hot air from entering the system from the

rear of the chassis. During the time when the fan module is being replaced, the

80 mm fan modules cool the switch modules and the Chassis Management

Module. Figure 3-8 shows cooling zones 3 and 4 that service the I/O switch

modules.

Figure 3-8 Enterprise Chassis switch module and Chassis Management Module cooling

zones 3 and 4

3.5.3 Power supply cooling

The power supply modules have two integrated 40 mm fans. Installation or

replacement of a power supply and fans is done as a single unit.

The integral power supply fans are not dependent upon the power supply being

functional. Rather, they are powered independently from the midplane.

Cooling zone 4 Cooling zone 3