RS 485 to RS 232 pin numbers

Thread Starter

leo v

Joined Jun 18, 2011
2
Hey.

Ill keep it simple.

I have a RS 485 Signal on a twisted pair i want to convert to RS 232

I have a RS-485 to RS-232 converter which will plug into the com port on my PC.

However i must make up a 9 pin (DB9) connector to plug into the convertor.

Which 2 pins should i solder my RS 485 signal onto on the DB9 connector?

Cheers
 

Thread Starter

leo v

Joined Jun 18, 2011
2
Thanks very much.

I have found the datasheet for my specific converter and it appears that pins 3 and 8 are being used for the twisted pair Rs485.
 

Alberto

Joined Nov 7, 2008
169
DB9 pin 2 & 3 are for Rx and Tx. You will need to use RTS (pin 7) to control direction. You can short pin 7 & 8 (RTS & CTS) if handshaking is needed.

Cheers

Alberto
 
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