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Kai Klaas
12/27/12 06:24
  12/27/12 06:26

Read: 924 times

#189040 - No!
Responding to: Mahmood Elnasser's previous message
Mahmood said:
Thinking about the problem again (After it has been solved) I noticed that MAX48x chips are rated for 12Vdc supply.

Vcc pin can withstand 12V, but the chip isn't specified to work at that voltage. Specified Vcc is 5V.

Hhm, 200m isn't too long for a RS485 bus. Is there a mistake with the termination resistors? More than only one at the end of the chain? Too low value?

To reduce data signal loss you can take thicker cables, AWG20 instead of AWG24. Try also to slow down the data rate.

Kai Klaas

List of 13 messages in thread
RS485 supply voltage      Mahmood Elnasser      12/26/12 12:00      
   Could the data rate be a problem?       Richard Erlacher      12/26/12 14:12      
   5V      Erik Malund      12/26/12 17:17      
   No!      Kai Klaas      12/27/12 06:24      
      Strange!      Mahmood Elnasser      12/27/12 10:56      
         stubs?      Erik Malund      12/27/12 11:38      
            Found it      Mahmood Elnasser      12/27/12 13:35      
               I made $$ on that one      Erik Malund      12/28/12 10:22      
   How to Protect ?      Satish S Munot      01/09/13 23:32      
      Use MAX3430      Oliver Sedlacek      01/10/13 01:49      
         Or the LT1785...      Kai Klaas      01/10/13 05:10      
      MAX485      Satish S Munot      01/10/13 07:43      
         low      Erik Malund      01/11/13 13:41      

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