Thanks for that Tom. I only temporarily used the spare fibre link to prove a point, mainly to Foxboro. We have now decided to ditch the WP and to replace it with a Linux PC with a big LCD flat screen, presenting the plant graphics etc. using XDM. The operators seem happy to loose the annunciator KBD and the BIG console from their very small pulpit. But I keep my options open for the Annunciator kbd. We have plenty of comms options to concatenate it with another WP. Cheers, Frits Schouten. BHP-NZSteel. -----Original Message----- From: tom.vandewater@xxxxxxxxxxxxxx [mailto:tom.vandewater@xxxxxxxxxxxxxx] Sent: Tuesday, 18 March 2003 02:49 To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] DNBX Solution - foxboro site Frits, I really liked your ASCII ART and it came through with no problem for me. You are very creative. I have a little simpler solution that can eliminate the 5 port hub and UTP cabling that you mention. There are many Thinnet to Fiber Converters available that are the same form factor as the Fiber to AUI converter that you showed in your ART. I listed the first one that I found on the web at: http://www.visiostencils.com/home/visiostencils_desc.asp?selSten=LAN_Product s.vss&manufacturer=CanogaPerkins# Thinnet to Fiber Converter Unique EQID: CP010 Manufacturer: CanogaPerkins Equipment Type: Converter Product Line LAN Products Product Description: [8808]Thinnet to Fiber Converter Fiber to AUI Extender Unique EQID: CP008 Manufacturer: CanogaPerkins Equipment Type: Extender Product Line LAN Products Product Description: [8805]Fiber AUI Extender So here is another possible solution. ----- -------------- -------- ------- | D | | Thinnet RX|<--------|TX | | | | N | 3m | to Fiber | 150m |/ | 2m | SUN | | B |->thin->| Converter |->Fibre->|Optics|->AUI->| BOX | | X | | TX|-------->|RX | | | ----- -------------- -------- ------- We looked at grounding as a source of the problems that we were having with nodebus extenders which are similar to DNBX's. The original installation documents for nodebus extenders showed the thicknet shield or jacket grounded at each end. If the ground potential at each end of the thicknet was different, it allowed a continuous current flow from one building to the other across the shield of the thicknet coax. That current flow could induce interference/noise onto the center conducter. If this solution fixed your problem that is probably what was happening. In or case, even fiber optic nodebus extenders didn't solve the problem so we knew that grounding wasn't our issue. Tom VandeWater Control Systems Developer Analyst Dow Corning Corp. Carrollton, KY -----Original Message----- From: Schouten, Frits JF [mailto:Frits.Schouten@xxxxxxxxxxxx] Sent: Sunday, March 16, 2003 3:31 PM To: 'blong@xxxxxxx' Cc: Foxboro DCS Mail List (E-mail) Subject: Re: [foxboro] DNBX Solution - foxboro site With the wrapping of the lines I was afraid that a bit of confusion might happen. Okay, here we go: From the DNBX I run a short piece of thin coax to one of those small 5 port hubs which has a thin net connection on the back. From one of the UTP connections on the hub I go to a utp to fibre converter. Now we're on fibre and go anyware we like, distance wise sort of. On the WP end I unplugged the aui connection from the ST500 (thick to aui converter) and connected the aui cable to the fibre converter. Circuit completed. We have lift off. All could have been a bit simpler with a 'thick to fibre' converter near the DNBX but we didn't have one . I'm actually not sure if they exist. Well, that's our solution to this very nagging DNBX problem. Cheers, Frits Schouten. BHP-NZSteel -----Original Message----- From: Brian Long [mailto:blong@xxxxxxx] Sent: Saturday, 15 March 2003 02:44 To: Frits.Schouten@xxxxxxxxxxxx Subject: DNBX Solution - foxboro site Fritz, Could you possibly go into a little more detail on your DNBX solution. I did not quite understand your diagram. Thanks in advance! Thanks, Brian Long E&I Superintendent Green Bay Packaging Arkansas Kraft Division 501-354-9205 EOM NOTICE - This message and any attached files may contain information that is confidential and/or subject of legal privilege intended only for use by the intended recipient. If you are not the intended recipient or the person responsible for delivering the message to the intended recipient, be advised that you have received this message in error and that any dissemination, copying or use of this message or attachment is strictly forbidden, as is the disclosure of the information therein. If you have received this message in error please notify the sender immediately and delete the message. _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. 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