RS-485 compliant drivers deliver a minimum differential output of 1.5 V over a 60-Ω load, while compliant receivers can detect a minimum differential input of 200 mV.
Q: How does the differential signal method in RS485 improve data communication over RS232? This "current" driven principal is how an 4-20 milliampere analog signal can work over 100’s of feet. In the end, the cable you use needs to work for the application where you use it.
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