Mobile Devices Ingenierie C4MAX-3GNA 用户手册
INSTALLATION GUIDE
14
3.6. Plug the device to the external battery
The device must have a direct connection with the main power (external battery).
Mobile Devices advise against the use of intermediate system.
1.
Check that all the inputs implied in the wake-up reasons configured on your
device are not connected.
device are not connected.
2.
Plug the device (black wire) to the ground of the external battery.
3.
Plug the device (red wire) to the permanent positive of the external battery.
4.
Plug the device (white wire) to the ignition (after contact).
In some case, the use of a circuit breaker can let the ignition (after contact) active.
Thus, the device will be ON indefinitely. So, it’s important to find a signal where the
ignition can be ON or OFF.
Moreover, it is imperative to insulate the GPS antenna in order to avoid it get in touch
with the car’s chassis.
The device should be always plugged to :
•
The ground of the external battery.
•
A ground point defined by the vehicle manufacturer (if different from
the ground of the external battery).
the ground of the external battery).
A circuit breaker should never be enabled as long as:
•
Ignition is active.
•
Ignition goes OFF since less than 2 minutes. This is the time for the
device to do a proper shutdown.
device to do a proper shutdown.
It is mandatory to add a fuse (2A) to the permanent positive. The closer to
the connection point with vehicle power.
the connection point with vehicle power.
4. Inputs activation threshold
Here are inputs activation thresholds (voltage).
•
Ignition (active high) is active if voltage greater than 3V (disabled if smaller
than 1V)
than 1V)
•
Alarm (active low) is active if voltage is below 1V (disabled if greater than 3V)
•
Digital Input1 (active low) is active if voltage is below 0.5V (disabled if greater
than 3V)
than 3V)
Note: Range voltage on inputs is 0-30V
5. Ouputs information
The two Outputs are active low and they can deliver up to 300mA.
Note: Outputs have a pull-up resistance of 10Kohms