F5 8900, Platform Manual

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9. Ensure that the power switch, located on the power supply next to the screw, is in the ON position.
About DC power supplies
The BIG-IP
®
platforms support DC power supplies. You can hot swap power supplies if there are two
installed in your system. The DC power supply does not have an on/off switch. You can control the power
from the rack switch or the DC power source.
The DC power supply includes a DC terminal block that connects the power supply to the DC power source.
The platform supports power redundancy, which ensures that the system is unaffected if a single power
supply fails in a system containing more than one power supply.
Figure 8: The 8900 platform DC power supply and terminal block
Figure 9: DC terminal block components
Caution: Before installing a DC power supply, be sure that the DC power source for the rack is powered
off.
Caution: Running without power supplies installed in all available bays in the platform can affect cooling
and electromagnetic interference (EMI). If you need to run the unit with fewer power supplies, you must
install a blank supply bracket into any empty power supply bays. The blank supply bracket is required to
maintain proper airflow in the system. If you do not have a blank supply bracket, leave all supplies installed
and unplug any unused power supplies.
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Platform Guide: 8900