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TOPIC: Biasing Resistor for RS485

Biasing Resistor for RS485 2 years 9 months ago #2089

  • kkong
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Any biasing resistors required for RS485 communications over long distance?
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Re: Biasing Resistor for RS485 2 years 9 months ago #2090

  • csearcy
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250ohm between A and B. Sometimes... a 470ohm pull-down is required from B to Signal GND.
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Re: Biasing Resistor for RS485 2 years 9 months ago #2095

  • kkong
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Noted, Thanks.
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