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???
08/03/12 13:05
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#187991 - I have seen such ....
Responding to: ???'s previous message
... actually it was a 3k9.

I located the 'designer' and asked why that value, the reply was "I thought I had to terminate with something" he had no Idea what he was talking about.

Use http://www.ti.com/lit/an/slyt324/slyt324.pdf termination, it is failsafe. Of course, if you are absolutely sure that everything that goes on the bus will have "open loop safety" 485 transcievers, you can use the 120

Erik

List of 3 messages in thread
TopicAuthorDate
rs422 and termination resistance            01/01/70 00:00      
   Why?            01/01/70 00:00      
      I have seen such ....            01/01/70 00:00      

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