INSTALLATION
3-17
Hardware
and Installation User Manual
3.5 INSTALLING THE BATTERY
The TI525/TI535 PLCs are shipped with a lithium battery already installed.
This battery has a minimum storage lifetime of three years and a minimum
backup lifetime of six months (0to 60C). Follow the steps listed below to
replace
the battery
.
3.5.1
Model TI525 Battery Installation
The
TI525 is capable of preserving system memory for at least ten minutes after
the battery and power have been disconnected. Complete the battery
replacement
within this period if you wish to save information.
1. Disable all user
-supplied power to the base.
2. Remove
the PLC from the base. Do not touch the components on the
printed circuit board or short any etch lines or pins as this may
disrupt system memory
. Do not place the PLC on a conductive
surface.
3.
Check the battery backup switch (DIP 2, switch 1). If it is off and you
wish to retain system memory
, turn the switch on.
4.
Remove the battery from the clip and disconnect the leads.
5.
The new battery should be a 3.0 VDC UL Recognized lithium battery
(PPX:2587678–8005). Connect the red wire to the positive pole and
the black wire to the negative pole of the new battery
. Then insert
the new battery into the battery holder
.
6. Insert the PLC into the base, enable power, and verify that the BATT
GOOD
LED comes on.
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