Hart Support to AC800M
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I'm not sure what do You mean by "fully support HART". HART is digitally enriched 4...20mA signal, so it's more then resonable to support it with analog IO modules that forward this signal to controller, don't You think? As to the other part - sorry, but there are no other HARTpassthrough IO then S800 and S900, so if you need secondary HART values (is this what You mean by full HART support?) choose S900 and if You need only other functionalities (diagnostics, remote config etc.) You can use S800.