GMT200 User Manual
TRACGMT200UM001
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3.6.
Ignition Detection
Table 5: Electrical Characteristics of Ignition Detection
Logical State
Electrical State
Active
5.0V to 32V
Inactive
0V to 3V or Open
Figure 4. Typical Ignition Detection
The white wire is used for ignition detection. It is strongly 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 available when the vehicle is running. For example the power 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 general purpose digital input which is the blue wire on GMT200 User Cable,
and it is a negative trigger. The digital input is recommended 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.