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???
11/15/06 15:15
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 		 #128027 - Nice methode!
Responding to: ???'s previous message
Erik said:
I have, in a similar situation (low baud and noise) had some success with a "desperate measure" winding the RS-485 cable through a ferrite ring. This is not my recommended method, but sometimes when working with "other guys crap" you have to use desperate measures.

This is a very nice methode to suppress common mode noise and it's the only methode that works to enhance the poorer becoming common mode rejection of devices at very high frequencies!

By the way, what you did is what these EMC-gurus do - for a lot of money...

Kai

List of 28 messages in thread
TopicAuthorDate
Requesting your suggestions on RS485            01/01/70 00:00      
   Sounds like an earthing problem            01/01/70 00:00      
      Sounds like an earthing problem >> Russell            01/01/70 00:00      
   Are the devices plugged in in an outlet with groun            01/01/70 00:00      
      Are the devices plugged >> Erik            01/01/70 00:00      
         motor noise            01/01/70 00:00      
   Some points            01/01/70 00:00      
       Some points >> Kai Klaas            01/01/70 00:00      
         DO, DO NOT            01/01/70 00:00      
            STP?            01/01/70 00:00      
               Better mounting close to the motor?            01/01/70 00:00      
                  Better close to the motor!            01/01/70 00:00      
               none, so do I            01/01/70 00:00      
               one final thought            01/01/70 00:00      
                  Nice methode!            01/01/70 00:00      
                     Mr. Ferrite lives here :)            01/01/70 00:00      
                        He is a SOFTY, I hope...            01/01/70 00:00      
                           not so soft - here are the hard facts            01/01/70 00:00      
                              Interesting, thanks!            01/01/70 00:00      
                                 closer to home            01/01/70 00:00      
                                    So you have to comply with CE standards...            01/01/70 00:00      
                                       totally diffrent technology            01/01/70 00:00      
         Cat5-cable            01/01/70 00:00      
         More details about used AC drives?            01/01/70 00:00      
   Thank you all members            01/01/70 00:00      
      Good luck!            01/01/70 00:00      
   Reporting From Site..Day1            01/01/70 00:00      
      against all my principles            01/01/70 00:00      

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