Rockwell Automation 1758-RTU202 DataSite Hardware User Manual - Manual (Page 54)

Publication 1758-UM001D-EN-P - June 2011
54 Operating the Controller
Lithium Battery
The DataSite controller uses a lithium battery that allows the real-time-clock
(RTC) to maintain the correct time setting through periods when line power
has been removed from the unit. Current drain on the battery during these
periods is approximately 1 microamp.
The battery should provide approximately 5 years of operation for the RTC.
The battery is also rated to maintain the real-time clock and RAM data for two
years continuously without any external power.
Battery Status Check
The DS Settings utility provides a display of the battery voltage.
If an application program uses the Sleep function of the controller, the battery
should be greater than 2.0V. Otherwise, the controller may not recover from
the Sleep mode. For details, refer to the DataSite Software User Manual,
publication
1758-UM002 .
ATTENTION
Accidental shorting or extreme temperatures may damage the
battery.