AutoGRAPH-GSM • USER MANUAL
48
TechnoKom © 2015
Connection of Backup Battery
To avoid the AutoGRAPH-GSM+ controller turning off, if the main power supply shuts down,
the power supply driver supports connection of a rechargeable backup battery.
As a backup battery, the tracker uses a lead/acid rechargeable battery of 12 V and 1.2 to 2
Ah capacity.
The AutoGRAPH-GSM+ has a built-in charger to charge the backup battery. The charger
turns on automatically and limits the charging current to 75 mA.
If the backup battery voltage drops below 11 V, the tracker will send a low battery notification
to specified number by SMS.
Switching between the main power supply and the backup power supply is performed
automatically. If the main power supply turns off, the tracker switches to the backup power
supply. As soon as the main power supply is restored, the controller will switch back to the
main power supply.
Connection Diagram of backup battery
The manufacturer recommends using small package lead/acid DT12012 or BPL2-12 batteries
and another battery with capacity not more than 2Ah as a backup power supply. Example of
lead/acid battery is given on the figure.
BACKUP BATTERY
RED SHORT (5)
BLACK (2)