26
DAILY 4x4 ‒ GUIDELINES FOR BODYBUILDERS
ELECTRONIC SUB-SYSTEMS
5.4 ELECTRICAL SYSTEM
– Printed 692.68.999 – 3 Ed. - Base 08-2020
191317
Figure 25
"STELLA" connections of various negatives with the system ground
191318
Figure 26
Shielding by means of a metal braid of a cable leading to an electronic component
5.4.6 Electromagnetic compatibility
It is recommended that electrical, electro-mechanical and electronic devices which comply with the following immunity require-
ments for electromagnetic emissions, both irradiated and conducted, are used, as shown below.
The level of electromagnetic immunity of the electronic devices equipping the vehicle at a distance of one metre from the transmit-
ting aerial must be:
● 50 V/m immunity for devices performing secondary functions (not impacting on direct vehicle control), for frequencies vary-
ing from 20 MHz to 2 GHz
● 100 V/m immunity for devices primary secondary functions (not impacting on direct vehicle control), for frequencies varying
from 20 MHz to 2 GHz;.
The maximum excursion allowed for transient voltage with appliances powered at 12 V is +60 V, measured at the terminals of the
artificial network (L.I.S.N.) if tested at the bench; otherwise, if tested on the vehicle, the excursion must be recorded in the most
accessible location close to the disruptive device.
Note
Devices powered at 12 V be immune to interferences such as negative spikes of -300 V, positive spikes of +100 V, bursts of +/-
150 V.
They must operate correctly during the phase when voltage drops to 5 V for 40 ms and to 0 V for 2 ms.
They must also resist the load dump phenomena up to 40 V.
To Next Page
Loading...
Need help?
General
