Just out of curiosity, what sort of sensors are you using?

-Shawn


Dave King wrote:
> I wasn't quite sure this was the correct topic tag.
>
> I'm working on a project that involves a large sensor
> array spread over a couple acres. I think the longest
> run so far is about 2500 meters (~8000 feet) with a
> sensor every 75 meters (~200 foot).  All the sensors
> are monitored by a master PC.  So the cables have to
> be waterproof etc and neither cause or be affected by
> RF.  Right now the big problem seems to be the layout
> without resorting to Cat-F.  Probably need a few hubs
> buried out there to make it work. Any good reference
> stuff to look at this type of extended net setup?
>
> I've been looking at building the interface using
> either a RTL8019AS or CS8900-IQ. Are there any others
> I should look at?
>
> The actual sensors are pretty simple and a 12C509A
> was selected and easily more than handles (on the bench)
> what it has to do.  I think the 509's will have to be replaced with
> something with a bit more power and pins such as a 870/877
> before it would handle both its sensors and the ethernet overhead.
> Are there any better suited pics?
>
> Dave
>
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