Sierra Wireless AirLink FX100, Руководство пользователя

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4112221 Rev 7.2 June 19, 2013 87
User Guide
Recommendations when Using the FX
Series on Trucks
12.2. Technical Constraints on Trucks
It is highly recommended to directly connect the power supply on the circuit breaker rather than on the
battery. The FX Series may be damaged when starting the truck if the circuit breaker is switched OFF
(in this case, the truck ground and the battery ground will be connected through the FX Series as
shown in the following figure).
Figure 42. Example of an Electrical Connection That May Damage the FX Series
The figure above gives an example of an electrical connection which may dramatically damage the FX
Series when its ground connection is directly connected to the battery ground.
In this example, when the circuit breaker is switched OFF, the current flows through the FX Series
and powers the electrical circuit of the truck (for example, the dashboard). Furthermore, when the
Starter Engine command is used, it will destroy the cables or the FX Series.
Since the internal tracks of the FX Series are not designed to support high currents (up to 60A when
starting the truck), they will be destroyed.