I was wandering if anyone could share with us the actual standards of the physical layer of serial industrial communication, namely the ANSI/TIA/EIA-485-A and the ancillary documents in the topic, like the TIA TSB-89-A (Application Guidelines for TIA/EIA-485-A).
Any official documentation is appreciated.
I searched and found a lot of useful application guide, but I didnt find any official doc.
I share here what I found.

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