The panel view plus will be approx 1/3 mile from the CompactLogix L43. The spec wants connectivity over radio transmission. Who are some vendors of this kind of setup?
well alot of things to consider.. what type communication ports? I'm kinda thinking you want ethernet. Lots of vendors use ethernet radio's. Decide what speed you want and go for it.
I've used Prosoft Radiolinx Ethernet wireless equipment for similar applications. Mainly, they are convenient, as I can order all of their equipment through my normal AB distributor. http://www.prosoft-technology.com/content/view/full/10117