> David
>
> Just as a point of reference, we are running RS485 on a pair, and have
> +24VDC on one pair, GND on another pair, and have not seen any issues at
> over 100 feet.  I think the issue you need to be aware of is how much
> current your pushing down the cable, and what the IR drop is going to be
> such that your device hanging out there can still function.
>
> --- On Thu, 9/10/09, David Duffy (AVD) <david@audiovisualdevices.com.au>

I have tested the almost identical setup, i.e. 15V on one pair, gnd on one
pair, and RS485 on a pair, at over 300 feet at 19.2kb with no repeated
blocks after 30 minutes (about 10,000 blocks). the blocks are 6 characters
long.

--Bob

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