7.If you are not reinstalling a board in the same slot, install a slot cover over the vacant slot. The tapered foot of the cover must fit into the mating slot in the expansion slot frame.

8.Replace the rear foam pad and the access panel (“Closing the System” on page 7).

9.Running the SSU is optional after you install or remove a PCI or ISA board.

Power Supplies

The system can be configured with two or three power supply modules. These configurations use a power share board that distributes the power supplied by two supply modules to various system components. Table 5 shows the power distribution using the power share board. Configurations using three power supply modules use the same power share board as those using two supply modules. The third module acts as a hot spare and allows hot swapping of failed power supply modules.

Table 5: Power Sharing
PowerOutput
Supply

 

B

System board 5V

 

 

A

System board 3.3V

ASystem board 12v-1

BSystem board 12V-2

APeripheral 5V

BPeripheral 12V

Warning!

Hazardous voltage, current, and energy levels are present inside the power supply. There are no user-serviceable parts inside it; servicing must be done by technically qualified personnel.

Installing Hardware 65