In message
<[email protected]>, dated
Tue, 15 Sep 2015, Robert Dunkerley <[email protected]> writes:
Where does it give the definition of a 'screened port' for use with EMC
standards?
In EN 555103-2 itself.
For example, would a coax bnc type cable meet this requirement, as long
as it had a 'braided screen' as opposed to foil?
Yes, if the connector variant is suitable for the cable and is assembled
correctly. Using a cable with a BNC having a bush with a too-large
internal diameter and/or an incompatible internal construction would not
comply. There must be a reliable 360 degree screen to connector body
contact.
Just a little confused, as this exemption would seem to cover the
majority of signal cables.
Braided screens are much less common that they used to be. There are
many more foil screens with drain wires. But the requirements also
include very low-inductance terminations of the screen to the connector
at both ends.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
When I turn my back on the sun, it's to look for a rainbow
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
-
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