334 9424200994 Rev N
Backup Battery for the Real-Time Clock
The backup battery for the real time clock is a standard feature of the BE1-11g. A battery is used to
maintain clock function during loss of power supply voltage. In mobile substation and generator
applications, the primary battery system that supplies the BE1-11g power supply may be disconnected for
extended periods (weeks, months) between uses. Without battery backup for the real time clock, clock
functions will cease if battery input power is removed.
The backup battery has a life expectancy of greater than five years depending on conditions. After this
time, you should contact Basler Electric to order a new battery, Basler Electric P/N 38526.
Replacement of the backup battery for the real-time clock should be
performed only by qualified personnel.
Do not short-circuit the battery, reverse battery polarity, or attempt to
recharge the battery. Observe polarity markings on the battery socket
when inserting a new battery. The battery polarity must be correct in
order to provide backup for the real-time clock.
Failure to replace the battery with Basler Electric P/N 38526 may void
the warranty.
Battery Replacement Procedure for J Style Case
Battery access is located behind the front cover of the BE1-11g on the front-panel circuit board. See
Figure 261.
Step 1: Remove the BE1-11g from service.
Step 2: Use a 7/64” hex tool to remove the front cover screws and remove the cover.
Step 3: Locate the battery holder attached to the rear of the cover. Remove the old battery. Consult
your local ordinance for proper battery disposal.
Step 4: Insert the new battery so that the polarity markings on the battery match the polarity markings
on the battery holder and circuit board.
Step 5: Reattach the front cover by pressing equally and firmly on both sides as shown in Figure 262.
Using a 7/64” hex tool, tighten the front cover screws to 10 in-lbs (1.12 N•m).
Step 6: Return the BE1-11g to service.
Timekeeping BE1-11g
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