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???
12/31/04 13:01
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#84167 - Hub ?
Responding to: ???'s previous message
While it is, indeed, imminently possible to use a 'hub' with RD485, that is not the normal practice. If you, for whatever reason, have to use a star topology, you will need a transciever for each and every 'ray'. You can, with proper protocol, connect all these transcievers in parallel to the masters Rx and Tx.

Before you finalize your design you MUST read "10 ways to bulletproof RS485", the address is in links <--- under "best serial appnotes"

Erik

List of 27 messages in thread
TopicAuthorDate
Control system            01/01/70 00:00      
   buses for industrial            01/01/70 00:00      
      CAN or RS-485            01/01/70 00:00      
         one way of master slave            01/01/70 00:00      
         RS485            01/01/70 00:00      
   Control system            01/01/70 00:00      
   Modbus            01/01/70 00:00      
      modbus or not            01/01/70 00:00      
   rs-485            01/01/70 00:00      
      Rs485 vs CAN            01/01/70 00:00      
      CAN            01/01/70 00:00      
         rs-485,high speed?            01/01/70 00:00      
            UART speed            01/01/70 00:00      
            Speed            01/01/70 00:00      
               Go Speed Racer!            01/01/70 00:00      
                  comments on speed and the above            01/01/70 00:00      
                     Daisy chain            01/01/70 00:00      
                        Daisy,Daisy.....            01/01/70 00:00      
                        no repeat            01/01/70 00:00      
                           Modbus            01/01/70 00:00      
                              Modbus            01/01/70 00:00      
                                 Hub ?            01/01/70 00:00      
   Modbus            01/01/70 00:00      
      Modbus            01/01/70 00:00      
         More modbus            01/01/70 00:00      
            Modbus            01/01/70 00:00      
               failed links            01/01/70 00:00      

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