JAJSFM2E April 2018 – September 2019 ISO1410 , ISO1412 , ISO1430 , ISO1432 , ISO1450 , ISO1452
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The RS-485 standard has typical curves similar to those shown in Figure 53. These curves show the inverse relationship between signaling rate and cable length. If the data rate of the payload between two nodes is lower, the cable length between the nodes can be longer.
Use Figure 53 as a guideline for cable selection, data rate, cable length and subsequent jitter budgeting.