Bothgrids ina power redundant system should have the same number of power supplies. If your
systemis configured for grid redundancy, slots 1 and 2 are assigned to grid 1 and slots 3 and 4 are
assignedto grid 2. If there are only two power supplies in a redundant- mode chassis, they should
bein slots 1 and 3. This would be a very unusual configuration, with a single B200 blade server in
thechassis. A larger configuration would require two power supplies per grid. Slot and cord connection
numberingis shown below.
Note
Figure 37: Power Supply Bay and Connector Numbering (AC Version Shown)
PS1 PS2 PS3 PS 4
ServerSlot1 ServerSlot2
ServerSlot3
ServerSlot5
ServerSlot7
ServerSlot4
ServerSlot6
ServerSlot8
Front
Fan1 Fan2
I/OModuleSlot 1
I/OModuleSlot 2
Connector
PS4
Connector
PS3
Connector
PS2
Connector
PS1
Fan6
Fan5
Fan4
Fan3
Fan8
Fan7
Rear
279770
Removing a Power Supply
Ifyou are using the Cisco UCS 5108 server chassis with one power supply (this is only supported in earlier
versionsof the system software), removing the power supply will cause the servers and chassis to shut
down.If you are using more than two power supplies, and you remove one of them, the servers continue
tooperate as long as the other power supplies are sufficient to meet the power requirements of the number
ofservers in the chassis.
Caution
Procedure
Step 1 Loosenthe captive screw on the front of the power supply.
Step 2 Liftup thepower supply’shandle to unseatthe power supply.
Step 3 Usingthe lever, pull the power supply from its slot. Place your other hand under the power supply to support
itwhile you slide it out of thechassis.
Step 4 Installa blank power supply filler panel (N20-CBLKP) if the power supply bay is to remain empty.
Cisco UCS 5108 Server Chassis Installation Guide
OL-20035-05 61
Installing and Removing Components
Removing a Power Supply