Basler Electric BE1-11t - Manual (Page 286)

274 9424200995 Rev H
Backup Battery for the Real-Time Clock
The backup battery for the real time clock is a standard feature of the BE1-11t. A battery is used to
maintain clock function during loss of power supply voltage. In mobile substation and line-powered
applications, the voltage that supplies the BE1-11t 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.
Caution
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.
Note
Failure to replace the battery with Basler Electric P/N 38526 may void
the warranty.
Battery Replacement Procedure
Battery access is located behind the front cover of the BE1-11t on the front-panel circuit board. See
Figure 223.
Step 1: Remove the BE1-11t 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 224.
Using a 7/64” hex tool, tighten the front cover screws to 10 in-lbs (1.12 N
•m).
Step 6: Return the BE1-11t to service.
Timekeeping BE1-11t