Tiso Tiso-19, Hardware Manual, Page: 6 / 9

2.1.2 “X” Relay
This is controlled via SMS or GPRS messages
:W,X,1 Selects NO
:W,X,0 Selects NC (by default the relay is in this state)
(Max load on relay contacts = 1AMP resistive)
It is possible to use this relay to disable a vehicle.
To interrupt the fuel pump, disconnect the supply to the pump and connect it to the tracker on
Pin 13. Then connect Pin 16 of the tracker to the positive on the fuel pump.
To disable the vehicle, send the
:W,X,1 command to change the relay to the Normally Open
(NO) position.
2.1.3 External Sounder
(Max load on relay contacts = 1AMP resistive)
This can be wired in using the static relay.
The External sounder pin is used to connect devices to ground. The external device has to be
connected to positive.