GV75 User Manual
TRACGV75UM00111
3.4.
Ignition Detection
Table 5: Electrical Characteristics of Ignition Detection
Figure 3.
Typical Ignition Detection
The white wire is used for ignition detection. It is strongly recommended to connect this wire to
ignition key at “RUN” position as shown above.
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 the backend server when ignition is on
and enter power saving mode when ignition is off.
3.5.
Digital Input
There is a negative trigger input on the GV75.For negative trigger input the electrical conditions
are:
Logical State
Electrical State
Active
0V to 0.8V
Inactive
1.7V to 32V or Open
Table 6: Electrical Conditions of Negative Trigger Inputs
The example connection is showed as follows:
Figure 1: Example of Connection for Negative Trigger Inputs
3.6.
Digital Output
The outputs are Open-Drain type with no internal pull-up resistor which can also be used to control
a relay. It means that the user has to connect a pull-up resistor or a relay coil between
the output
pin and any positive voltage (32V max) to generate a correct output. Each output can drive a
continuous current of 0.15A.
The green wire is low side 150mA max, and the blue wire is low side 150mA max with latch.
The electrical conditions are:
Logical Status
Electrical Status
Active
5.0V to 32V
Inactive
0V to 3V or open
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