User's Manual

GMT100 User Manual
TRACGMT100UM001 -12 -
Table 5: Electrical Characteristics of Ignition Detection
Logical State Electrical State
Active
12/24V
Inactive 0V to 3V or Open
Figure 4. Ty
pical Ignition Detection
The white wire is u sed for ignition detection. It is str ongly recommended to connect this
wire to ignition key “RUN” position as shown up.
An alternative to connecting to the ignition switch is to find a non permanent power source
that is only a vailable when the vehicle is running. For example the pow er source for the
FM radio.
Ignition signal can be co nfigured to start transmitting information to backend server whe n
ignition is on; and enter power saving mode when ignition is off.
3.7. Digital Input
There is a g eneral pur pose digital input whic h is the blue wire on GMT100 User Cable,
and it is a negative trigg er. The digital input is r ecommended to support panic button
function.
Table 6: Electrical Characteristics of the digital inputs
Logical State Electrical Characteristics
Active 0V to 0.8V
Inactive Open
The following diagram sh
ows the recommended connection of the digital input.