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Hello:
ISO3082 isolated RS485, what is the effective transmission distance?
Best Regards
Leon
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Hi Leon,
The transmission cable length that one can achieve on RS-485 bus depends on many factors like datarate, cable capacitance & losses, maximum transceiver differential output voltage and others. As a general rule of thumb, it is observed that the typical cable length that one can achieve for a given datarate is shown in the plot below.
Looking at the plot, you can see that one can achieve a distance of 1200m for a datarate of 100kbps. For higher datarates, the maximum cable length that one can achieve goes down. For more details on various dependencies on maximum transmission cable length, I would recommend you to go through the below application note. Let me know if you have any other questions, thank you.
Regards,
Koteshwar Rao