1/16/2019 3:38 PM | |
Joined: 9/27/2006 Last visit: 9/21/2024 Posts: 12282 Rating: (2684) |
Hello CTF_***; From the drawing you are showing, it seems you have very little information on the structure and use of a DP/DP coupler. There is no configuration I know of that requires connecting 2 DP/DP couplers in series. The coupler is a special DP-slave designed with 2 seperate Profibus-DP interfaces, each one connecting to a different DP master and network, allowing the 2 masters to exchange data over Profibus. Standard Profibus configurations allow master-slave communications only. The coupler is used to bypass that limitation and allowing masters to talk to each other through the interfaces of this special slave.. Please take a few minutes to study the following manual for the DP/DP coupler, it is short but contains many important installation and configuration details that you should be aware of. Siemens DP/DP coupler manual: https://support.industry.siemens.com/cs/ww/en/view/1179382 Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 1/16/2019 10:12:17 PM |
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This contribution was helpful to1 thankful Users |
1/17/2019 2:50 AM | |
Posts: 5 Rating: (0) |
Hello Daniel, Thank you for your quick reply. The drawing from last post was not correct. It contains a CM and CPU1212, and a DP coupler. Let me clarify the question better this time. Please check the updated attachement. The question is from my customer. Usually, one PROFIBUS cable with 2 standard connectors are used to connect DP coupler and Commnication module. Since the PROFIBUs cable needs to be changed for some reason, he propose a solution before the new cable delivery. Now he has 2 short PROFIBUS cable. Each one is not long enough to cover the distance, but if he can connect the cables into one, the length is enough. He has some bus connector 6ES7972-0BB52-0XA0 and standard connectors. He proposes to plug the standard connector into the piggyback of 6ES7972-0BB52-0XA0. Although I insist the standard connection, I have to give him an answer (or strong proof, this would/ world not work properly, for example). My question is: does this kind of connection have any risk for data exchange? Will it work? Would it be recommand to use this way or just it use as temporery solution? Thank you in advance! BR
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1/17/2019 12:13 PM | |
Posts: 5 Rating: (0) |
Hello Daniel, Thank you so much! Your answer really helps. The customer gives up the unoficial connection. BUT he doesn't give up.. A proposal is made to use the M12 cicular connector (please take a look at the attachement) to connect two cables. Therefore, for each cable, one end is SUB D 9 pin cnnector (connect to DP/DP coupler), another end is M12 cicular connector (connect to M12 connctor of another cable). From the brochure, it looks okay. If you have some comments, please put it below.Thank you in advance! BR
AttachmentIndu-Sol_M12_Circular_connector_FC_plug_PRO_self-made_up(1).pdf (335 Downloads) |
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