Revision 6 HC900 Process & Safety Controller User and Installation Manual 205
21 April 2017
Battery Replacement Procedures
Table 40 – Replacing a Backup Battery (CPU Powered))
If the battery is removed from the Controller Module when AC power is not applied,
the content of RAM will be lost.
Before beginning this procedure, upload and SAVE a copy of the configuration, or ensure that a
previously SAVEd copy of the current configuration is available.
Apply site AC power to the Power Supply that is associated with the controller Module.
Press the latch on the battery cover to release the
battery holder, and use the molded-in extension on
the battery holder to extract the holder.
Note the orientation of the battery-holder assembly
for re-insertion afterwards
The battery is retained in the holder by spring
tension of the plastic holder itself.
Extract the battery (single battery for older models,
two batteries for new models), from the holder by
using your thumb to apply pressure to the front end
of the battery, and rotating it to the left.
Insert the negative end of the new battery into the
back end of the holder, and press on the battery so
that it snaps into the holder.
To ensure that the battery is seated properly, rotate
it in the holder, using finger or thumb pressure
toward the positive (front) end of the battery.
While maintaining proper orientation (battery toward the left), slide the battery holder into the slot in the
Controller Module until it snaps into place.
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