422 and 485 are balanced, but generally you can cheat and use them on 232. You will have to research the connector pin outs.
http://www.aviom.com/library/technical-resources/74_rs-232-rs-422-pinout-information.pdf

The unused input has a pull down resistor, so you can float it or ground it. The signal swing is less, but in most cases it won't matter.


On 9/7/2011 10:35 AM, Richard W. Solomon wrote:
One of the output DB-9's says RS-422 on it. Is there a way to
convert it to RS-232 so I can use the Software package I found
for it ?

Thanks, Dick, W1KSZ

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