Re: [foxboro] DNBI Cabling for long Distance

I'd be careful with that.  The additional latency of the converters may 
exceed the maximum allowed propagation time on the nodebus segment, 
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 
three segments you can connect the NCNIs back-to-back without a switch.


Corey Clingo
BASF Corporation






"Khudhair, Waleed K" <waleed.khudhair@xxxxxxxxxx> 
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[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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