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6 Comments

1. 

   Yay! Maybe this means my request for a TTL <–> RS-232 adapter is in the works!

   Comment by tastewar — January 17, 2013 @ 1:52 pm

2. 

   note that these pin outs are only good for NI hardware and NI hardware is $$$ (but very nice). there isn’t a standard governing serial pin outs so everyone does their own thing…

   Comment by andy — January 17, 2013 @ 2:27 pm

3. 

   Actually serial pin outs are standardized. There are different configurations such as a null modem, but that too is a standardized pin out.

   Comment by Tim Martin — January 17, 2013 @ 2:51 pm

4. 

   RS-245 ?

   RS-485

   Comment by Bill — January 17, 2013 @ 3:22 pm

5. 

   > Actually serial pin outs are standardized.

   The pin outs are standardized. However, in practice, what the pins are used for is not.

   Comment by bill earl — January 17, 2013 @ 5:31 pm

6. 

   DB9 and DB25 rs232 are standardized. Modular jacks are wildly non-standardized, and 10pin versions are pretty uncommon. Personally, I quite like the cisco 8-pin RJ45 pinout (RTS, DTR, TXD, GND, GND, RXD, DSR, CTS) (which also works using the center 6 pins), but … that’s personal, and it’s been pointed out that it doesn’t map well to standard building UTP schemes. It does let you plug one rj45 directly into another using a standard "rolled" flat cable.

   Comment by WestfW — January 18, 2013 @ 2:52 am

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