APC AP7900 Computer Accessories User Manual


 
®
USER’S GUIDE
Switched Rack PDU
34
Purpose and benefits of outlet groups
By using groups of synchronized outlets on Switched Rack PDUs, you can
ensure that outlets turn on, turn off, and reboot in a synchronized manner.
Synchronizing control group actions through outlet groups provides the
following benefits.
Synchronized shutdown and startup of the power supplies of dual-
corded servers avoids erroneous reporting of power supply failures
during a planned system shutdown or reboot.
Synchronizing outlets by using outlet groups provides more precise
shutdown and restart timing than relying on the delay periods of
individual outlets.
A global outlet is visible to the user interfaces of the Switched Rack
PDUs to which it is linked.
Under normal conditions all outlets in outlet groups affected by a
control action will perform that action within a one-second interval.