content_image/1004234.jpg
## 3.3 Planning for power 

This section describes necessary information for planning to attach both power supplies to the main power supply lines. 

Plan to connect the power cords on the right side of the rack (when viewed from the rear) to power sources that provide power in the 100 - 127 V / 200 - 240 V AC range at 10.0/50A 50/60 Hz. 

Each power supply can provide a maximum output power of 1300 W if a high line voltage (200-240V AC at 6.9A, 50/60 Hz) power source is used (this configuration is the recommended power configuration). Power supplies also can provide a maximum output power of 900 W if a low line voltage (100-165V AC at 10.0A, 50/60 Hz) power source is used. 

Note:  High line power is strongly advised for systems using the large or extra large modules. When using low line voltage, a system populated with large or extra large flash modules will throttle I/O if running on a single power supply, such as the case if a a PSU fails. 

Using two power sources provides power redundancy. 

Note:  We suggest that you place the two power supplies on different circuits. 

Both power connections are shown in Figure 3-1. 

<img src='content_image/1004234.jpg'>

The power cables are specific to the power requirements of your country or region. 

Important:  The power cord is the main power disconnect. Ensure that the socket outlets are near the equipment and easily accessible. 

## 3.4 Configuration planning 

You must plan for the management address and service addresses before the system is installed. A management address must be assigned to the system. The management address provides access to system configuration and administration functions, such as the management GUI and CLI. 

