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???
01/09/09 08:08
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 		 #161374 - rs-485 not the rs-232 signal
Responding to: ???'s previous message
Hai

Neil Kurzman said:
Yes you may be using 485 transceivers. But, RS-485 does not have all the RS-232 signals.


I'm using standar TTL to rs-232 at PC then with standard rs-485 converter.
Fullduplex need bundled cable/at least 12 inside.(means lot of moneys)

Planned with cheap CAT-5(at inside 8 cable).

Is there another rs-232 TTL converter chips that can handled 20-40 meters without reduce the speed.
115K2 bps.

Thank's
Jeckson Ben


List of 28 messages in thread
TopicAuthorDate
Someone gave me suggest            01/01/70 00:00      
   Unhelpful subject line            01/01/70 00:00      
   I would use RS485 instead            01/01/70 00:00      
      it would be easier ..            01/01/70 00:00      
      rs-485 with fullduplex            01/01/70 00:00      
         Not 485            01/01/70 00:00      
            rs-485 not the rs-232 signal            01/01/70 00:00      
               Have you actually looked at any datasheets yet?            01/01/70 00:00      
         More details , RTS, DTR            01/01/70 00:00      
            6 lines uart and 2 power supply            01/01/70 00:00      
               RE: Could I used CAT-5            01/01/70 00:00      
               Yes (Little Maths)            01/01/70 00:00      
                  speed??            01/01/70 00:00      
                     You do the maths!            01/01/70 00:00      
                  1200pF ?            01/01/70 00:00      
                     Similiar confused me...            01/01/70 00:00      
                        One more point.            01/01/70 00:00      
                           boost the driver current            01/01/70 00:00      
                              No linear relationship            01/01/70 00:00      
                     Its EIA- 232 D&E standard            01/01/70 00:00      
                        Not relevant here - beyond the spec!            01/01/70 00:00      
                           3 TX and 3 Rx distance 20 m and 115K2            01/01/70 00:00      
                              What does the datasheet tell you?            01/01/70 00:00      
                                 Thank's            01/01/70 00:00      
                                    Try this one aswell            01/01/70 00:00      
                                    before testing            01/01/70 00:00      
                                       What "testing"            01/01/70 00:00      
   RE: The data speed must 115K2            01/01/70 00:00      

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