Installation Guide, Third Edition - Server Expansion Unit

Chapter 4

Cabling and Power Up

Connecting AC Input Power

The Server Expansion Unit has two line cord configurations:

• The preferred configuration is line cords B0 and A0 plugged into the Server Expansion Unit. This

configuration provides power supply redundancy when each power cord is plugged into a different power

source.

• The other configuration is line cord A0 plugged into the Server Expansion Unit. Use the A0 power cord

receptacle when only one power source is available to supply power to the Server Expansion Unit.

Figure 4-38 Power Cord Receptacle Configuration

Power cord receptacles are identified using a label at the rear side of the chassis indicating which receptacle

is B0 and which receptacle is A0.

The Server Expansion Unit follows the power configuration that is selected for the server. So, if grid A0 & B0

are selected for the server, the Server Expansion Unit needs to have both power cords connected. Otherwise,

power fault messages are logged. You cannot select one power configuration for the Server Expansion Unit

and another power configuration for the server.

NOTE If only one power cord receptacle is used, always plug the power cord into A0.

B0 A0