Quick Manual

12
5 Vehicle Integration
To ensure that the FDM operates properly, it is necessary to observe the following
vehicle integration guideline.
5.1 Power Supply
The FDM device must be connected to the vehicle terminal 30 and terminal 31 to ensure a consistent data
connectivity.
5.2 General Mounting Position
The FDM device must be installed inside the vehicle in a dry place. Installation shall be as high as possible to
get the best mobile connectivity.
The mouting holes can be used to fix the device.
5.3 Additional Mounting Instructions
For vehicle integration, there are some additional requirements to be considered for FDM mounting.
The reason for this is because the FDM device contains an integrated SMD antenna for cellular networks
(GSM, LTE).
Antennas need ground base for antenna current. PCB’s copper layers are ground in this design. It means that
all part of the device (enclosure, PCB, wiring harness) will affect to the RF performance. All metal structures
surrounding the device are also affecting RF.
If the unit is installed near metal structures, RF power may be reflected onto the unit, heating up critical
components and causing accelerated ageing or even permanent damage.