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CHASSIS MODIFICATIONS
D
AILY 4x4
Base - May 2007 Print 603.93.761
Electrical System: Modifications and Drawing-Off Power
2.16.2 Electromagnetic compatibility
We recommend that electrical, electro-mechanical and electronic devices which comply with the following immunity require-
ments for electromagnetic emissions, both irradiated and conducted are used:
The level of electromagnetic immunity of the electronic devices equipping the vehicle, at a distance of 1 metre from the transmitting
aerial must be:
- 50V/m immunity for devices performing secondary functions (not impacting on direct vehicle control), for frequencies varying
from 20 MHz to 2 GHz.
- 100V/m immunity for devices performing main functions (not impactin g on direct vehicle control), for frequencies varying from
20 MHz to 2 GHz.
The maximum admissible variation in transient volt age for units powered with 12V is +60V, as measured at the terminals of the
artificial network (L.I.S.N.) during bench tests; otherwise, if the measurements are made on th e vehic le, t h e variation must be deter-
mined at the most accessible point in the proximity of the device generating the disturbance.
The 12 V supplied devices must be free from immune from negative noises, such as -300V spikes, posi-
tive +100V spikes, +/-150V burst.
They must operate correctly during voltage lowering phases to 5V for 40mS and to 0V for 2mS.
Moreover, they must resist the load dump phenomena up to 40V.
NOTE
Max levels measured on bench for radiated and driven emissions generated by 12V devices are shown in table below:
Table 2.17
Frequency range and limits acceptable by noise in dBuV/m
Type of
emission
Type of
transdu
cer
Type of
disturb
ance
Type of
detector
150KHZ
300KHZ
530KHZ
2MHZ
5.9MHZ
6.2MHZ
30 -54
MHZ
68-87
MHzm
obile
services
only
76-108
MHzbro
adcast
only
142-175
MHZ
380-512
MHZ
820-
960
MHZ
Unit of
measu
re
radiated Aerial at
adis-
Use electrical/electronic equipment in compliance with the EC Directives on electromagnetic compability, i.e use suitable compo-
nents for vehicle applications ”e.” marked (the EC marking is not sufficient). If in any doubt, call the IVECO Service Network.
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