Re: [foxboro] RCNI

Old age is setting in. I can't count to two. The NCNI was not described
correctly which is sad because I have two pair in my lab.


Here's the revised explanation.


The RCNI takes one 10 Mbps Ethernet port and a set of switches (implemented
using a serial port) and has two 100 Mbps Ethernet outputs. There is
additional internal magic.


The NCNI takes two 10 Mbps Nodebus inputs (bus A and bus B) and produces ONE
100 Mbps Ethernet output to one of the Control Network switches (A or B). It
takes two NCNIs per I/A Series Nodebus to build a complete connection to the
Control Network. There is additional
internal magic.


Sorry for the confusion. 


Regards,

Alex Johnson
Invensys
10707 Haddington
Houston, TX 77063
713.722.2859 (office)
713.722.2700 (switchboard)
713.932.0222 (fax)
ajohnson@xxxxxxxxxxx <mailto:ajohnson@xxxxxxxxxxx> 
For the latest information on ArchestrA, go to
www.invensys.com/Archestra.html
<http://www.invensys.com/divisions/Archestra.html> .


        -----Original Message-----
        From:   Johnson, Alex (Foxboro) [SMTP:ajohnson@xxxxxxxxxxx]
        Sent:   Friday, January 10, 2003 10:14 AM
        To:     foxboro@xxxxxxxxxxxxx
        Subject:        Re: [foxboro] RCNI


        No. The RCNI and NCNI are not interchangeable.

        The RCNI takes one 10 Mbps Ethernet port and a set of switches
(implemented
        using a serial port) and has two 100 Mbps Ethernet outputs. There is
        additional internal magic.

        The NCNI takes two 10 Mbps Nodebus inputs (bus A and bus B) and
produces two
        100 Mbps Ethernet outputs to the Control Network switch. There is
additional
        internal magic.


        Regards,

        Alex Johnson
        Invensys
        10707 Haddington
        Houston, TX 77063
        713.722.2859 (office)
        713.722.2700 (switchboard)
        713.932.0222 (fax)
        ajohnson@xxxxxxxxxxx <mailto:ajohnson@xxxxxxxxxxx> 
        For the latest information on ArchestrA, go to
        www.invensys.com/Archestra.html
        <http://www.invensys.com/divisions/Archestra.html> .


                -----Original Message-----
                From:   Bill_Powell@xxxxxxx [SMTP:Bill_Powell@xxxxxxx]
                Sent:   Friday, January 10, 2003 9:26 AM
                To:     foxboro@xxxxxxxxxxxxx
                Subject:        [foxboro] RCNI


                Can you use a RCNI in place of a NCNI?

                Bill Powell


                 
                 
                
        
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