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???
01/16/08 18:10
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 		 #149583 - galvanic insulaton
Responding to: ???'s previous message
Hi Jeroen,

1 - Why the transformer from 230 to 20 and not 3 transformers from 230 to the needed rectifier voltage?

2 - Why not using opto couples on the communication side ?

3 - Why using RS 485. In DOMOTICA the distances are quite small and the speed is not ver high, is it?

Dick

List of 27 messages in thread
TopicAuthorDate
galvanic isolated communication            01/01/70 00:00      
   What is domotica?            01/01/70 00:00      
      Domotica            01/01/70 00:00      
         GND loop wont be a problem            01/01/70 00:00      
            Misunderstanding?            01/01/70 00:00      
               RS485 Isolators            01/01/70 00:00      
      Transformers vs. optocouples ?            01/01/70 00:00      
         there are galvanically isolated 485 transcievers            01/01/70 00:00      
   PROFIBUS?            01/01/70 00:00      
      I would not            01/01/70 00:00      
         Have you seen...            01/01/70 00:00      
            no, I have not and I definitely would not            01/01/70 00:00      
         RS485            01/01/70 00:00      
   Fibre optics?            01/01/70 00:00      
      Yes, there is, but rather expensive!            01/01/70 00:00      
   Wireless?            01/01/70 00:00      
   Power-line communication?            01/01/70 00:00      
   Standard Radio Uses Optoisolators            01/01/70 00:00      
      Shield            01/01/70 00:00      
         noibody said not to ground cases etc            01/01/70 00:00      
   Isolated RS485            01/01/70 00:00      
   Jeroen, where are you??            01/01/70 00:00      
      please do not answer Jeroen, where are you??            01/01/70 00:00      
         ???            01/01/70 00:00      
            Kai            01/01/70 00:00      
               But he did already!            01/01/70 00:00      
   galvanic insulaton            01/01/70 00:00      

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