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What is the maximum data rate to be achieved by an RS-485 transceiver to date?

RS-485 is a simple, inexpensive, reliable communications specification. It is a widely used protocol for POS, industrial, and telecom applications. Its wide common-mode range enables data transmission over longer cable lengths and in noisy environments such as the floor of a factory. Also, the high input impedance of the receivers allows more devices to be attached to the lines.

 

Lots of factors limit the maximum data rate of RS-485, including cable length, cable construction (shielding enhances noise immunity), driver output impedance, receiver input impedance, terminations, driver slew rate, and more.

 

Poll Question: What is the maximum data rate that has been achieved by an RS-485 transceiver to date?

Poll Results
  • 20Mbps over 50 meters of Cat6 cable (8%)
    2/25
  • 40Mbps over 100 meters of Cat5 cable (8%)
    2/25
  • 100Mbps over 10 meters of Cat5e cable (56%)
    14/25
  • 200Mbps over 50 meters of Cat6 cable (12%)
    3/25
  • Other; Please Explain in comments (16%)
    4/25

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