Bofan PT502 User Manual page 6

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After you connect relay according to above picture correctly, you can send following SMS commands to
stop car or restore the circuit:
Stop Car : 000000OPC1,1
Restore circuit : 000000OPC1,0
Note: 000000 is the tracker defaulted password, if you already changed your tracker password, please
use your new password.
Please don't use this feature while car/vehicle with high-speed driving, and we
suggest connect relay with fuel control line in your car, Bofan is not liable for any
traffic accidents.
For Analog Input
Connect fuel sensor or temperature sensor refer to above picture.
Our tracker only supports the fuel sensor which can send out 0-24V signal.
When fuel sensor sends out 0V signal, it means the tank is empty.
When fuel sensor sends out 24V signal, it means the tank with full fuel.
When fuel sensor sends any digital signal to tracker, the related fuel level will be displayed on our
software when reporting data to server by GPRS
Third, push the button from OFF to ON side to turn on the tracker as below:
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