Replacing the Batteries
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AXB-TPI/3 Touch Panel Interface 3
Replacing the Batteries
There are two lithium batteries (FIG. 20) on the main TPI/3 circuit card, with a life of
approximately 2.5 years. They protect stored commands and pages against a power outage. The
batteries are not used when DC power is supplied to the TPI/3. Write down the replacement date on
a label by adding 2.5 years to the date of installation, and attach it to the panel for future reference.
Before replacing the lithium batteries, make sure you have a current copy of the pages stored in the
touch panel. This will avoid any inadvertent loss of data or service outage. To replace the lithium
batteries, you will need a Phillips screwdriver and a non-conducting flat-blade tool to slip under
each battery to pry it up and out of the socket.
To replace the lithium batteries in the TPI/3:
1. Discharge the static electricity from your body by touching a grounded metal object.
2. Disconnect all the connectors from the rear of the TPI/3.
3. Remove the three input modules from their slots on the rear panel by removing the two black
thumbscrews for each of the three slots and sliding the modules out of the enclosure, as shown
in FIG. 21.
4. Remove the Phillips screws from the enclosure, as indicated in FIG. 22.
5. Slide the cover off of the enclosure to expose the batteries.
FIG. 20 Lithium battery and socket
Static electricity can damage electronic circuitry. Before removing the touch panel
circuit card from the enclosure, discharge any accumulated static electricity from your
body and flat-blade tool by touching a grounded metal object.
FIG. 21 Remove the input modules from the three slots on the rear panel
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