Patent ID: 6879057

Claim:
An electrical distribution box for vehicles with two networks at different voltage levels, comprising electronic centralised signal and power control means, including a microprocessor ( 21 ) and electric protection means, all of which are arranged on one or several printed circuit boards housed inside a casing to control variable characteristics of the signal and power currents through the vehicle, which box ( 5 ) comprises means for its electrical connection to at least one DC power source and to parts of the vehicle which are controlled by said electronic centralised signal and power control means, characterised in that: said networks include at least one voltage converter; said voltage converter ( 5 ) is located inside said casing of said distribution box ( 1 ) on an independent printed circuit board ( 10 ) or on a separated area of one of said boards of the control means, said independent board ( 10 ) or said separated area being arranged in a part of said casing which is empty both above and below thereof to minimise thermal and electromagnetic interaction between the converter ( 5 ) and said electronic control means; electromagnetic screening means for said converter ( 5 ) and thermal dissipation means for the supporting plate of the converter ( 5 ) are provided inside said casing; a single microprocessor ( 21 ) controls the voltage converter ( 5 ) and said centralised signal and power control; and said independent board ( 10 ) or separated area comprises at least one rapid transient electrical signal conduction path ( 11 ) connected to ground to reduce electromagnetic emissions.