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Re: [AVR-Chat] RS485 connectios

2005-03-07 by Kathy Quinlan

Javier Fiasche wrote:

> 
> Does anyone have idea/schematics of a rs485 db9 connector pinout?? How are
> standard connections made?? and another question, any ideas of circuitry for
> making a rs485 bus terminacion aviable or not in the board using a jumper, i
> think that someone has already posted this, but i dont seem to find it,
> Thanks
> 
> Javier


RS-485 does not seem to have a standard pinout, but specific aplications 
have standard pinouts, e.g. some use RJ45 connectors, DMX-512 uses 
either a cannon 5pin or 3pin connector.

If you are only talking about the simple 120R termination, then just put 
a jumper to open one end of the Resistor.

Regards,

Kat.


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