Rockwell Automation 1748 DataSite Configured Panel Installation Instructions - Manual (Page 48)

Publication 1748-IN001B-EN-P - May 2009
48 DataSite Configured Panel Battery
Deep-cycling
Deep-cycling is referred to as the discharging of a battery more than 80% of its
expected capacity. This form of discharging should be avoided as it will cause a
decrease in the battery’s life expectancy. The DataSite configured panel has
been designed and rated to a depth of discharge at 80% of its rated capacity at
20 °C (68 °F).
The table, DataSite Configured Panel Battery Derating , shows the rated values
for multiple temperatures along the suggested operating temperature. If the
DataSite configured panel uses more than the rated number of hours backup
energy, battery life will be reduced due to deep cycling. When necessary to
deep cycle the DataSite configured panel batteries on a normal basis, a larger
size battery should be considered or a battery specific for the application
should be used to help ensure reliability of the DataSite configured panel.
Energy Storage
Over the lifetime of the battery, the actual capacity of stored energy will
decrease. The number of cycles, depth of discharge and ambient temperature
will affect how much energy can be stored within the battery throughout its
life cycle.
Batteries should be replaced as part of a regular maintenance schedule. See the
table,
Recommended Battery Replacement Schedule on page 31 , for
recommended battery replacement schedules. If the DataSite configured panel
batteries are not replaced at suggested intervals, the battery capacities may fall
below 60% of their rated capacity having a negative effect on the number of
hours backup power.
More information regarding the charge and discharge characteristics of the
batteries used in the DataSite configured panel can be found at
http://www.Power-sonic.com .