[foxboro] R: DNBI Cabling for long Distance

Another solution is to use DNBX instead of DNBI, BUT I was told about
Nodebus problems with this configuration.

I think NCNI and a remote 1x8 will be good.

Davide

-----Messaggio originale-----
Da: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
Per conto di Corey R Clingo
Inviato: Tuesday, July 25, 2006 4:07 PM
A: foxboro@xxxxxxxxxxxxx
Oggetto: Re: [foxboro] DNBI Cabling for long Distance

I'd be careful with that.  The additional latency of the converters may=20
exceed the maximum allowed propagation time on the nodebus segment,=20
causing problems with the Ethernet collision detection,

When we have had to do this, we dropped in a remote 1x8  and used FONBEs

(in the old days).  or NCNIs (now).  If you just need to connect two or=20
three segments you can connect the NCNIs back-to-back without a switch.


Corey Clingo
BASF Corporation






"Khudhair, Waleed K" <waleed.khudhair@xxxxxxxxxx>=20
Sent by: foxboro-bounce@xxxxxxxxxxxxx
07/25/2006 06:01 AM
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Subject
[foxboro] DNBI Cabling for long Distance






Guys,
As per the I/A Doc's, the DNBI can be cabled in either of two
configurations:

*       Local - where the DNBI and the processor share the same
enclosure

*       Medium-Distance - where the DNBI and the processor are separated
by a distance of greater than 2 m (6 ft) up to 45m (150 ft).

What about if the DNBI and the processor are separated by a distance of
greater than 45m, can we use a media converter at both ends and use
fiber optic cables in between?

Regards,

_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
Waleed K. Al-Khudhair
Uthmaniyah Gas Plant
Engineering Building
Room 130
DCS Administrator
Tele   +9663577-5396
Pager +9663870-1474
eFax   +96638744444 / Ext. 133732









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