El 19/12/2010 12:34, Magnus Danielson escribió:
Need to look at it. But essentially, during normal operation common
mode isolation isn't all that hard. The problem is that during failure
mode can what should be a common mode voltage and current become
diffrential mode, which jumps straight through the transformers as a
transient and that will burn the receiver anyway...
Usually I'm worried with common mode isolation, for noise and EMC
issues, more than for protection. The kind of equipment where I've used
it are used in a quite controlled environment (if there is a
high-voltage transient there, and if it toast the satellite instrument,
any damage in my equipment would be a lot lot lot less important...
almost futile :) )
I've seen people burn their Ethernet port by hooking in an ISDN line
to the wrong connector.
I can imagine :)
A wrapped solution like the ADUM1200 puts more stuff between the
transformer and actual receiver... so maybe you save the receiver, but
you might toast the isolator.
Since usually the receiver circuit is also ahead the isolator (for
example RS422 to TTL, then isolator), it would also be toasted...
perhaps protecting the isolator :)
For an optical isolation you might toast the transmitter, but that's
about it. Probably that would be the least of your problems when it
occurs.
Same thing...
Cheers,
Magnus
Regards,
Javier
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
--
------------------------------------------------------------------------
Javier Herrero EMAIL: jherr...@hvsistemas.com
Chief Technology Officer
HV Sistemas S.L. PHONE: +34 949 336 806
Los Charcones, 17 FAX: +34 949 336 792
19170 El Casar - Guadalajara - Spain WEB: http://www.hvsistemas.com
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
