GMT100 User Manual
TRACGMT100UM001
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Table 5: Electrical Characteristics of Ignition Detection
Logical State
Electrical State
Active
12/24
V
Inactive
0V to 3V or Open
Figure 4.
Typical 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 configured to start transmitting information to backend server when
ignition is on; and enter power saving mode when ignition is off.
3.7.
Digital Input
There is a g eneral purpose 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 shows the recommended connection of the digital input.