Termination Resistor - RS-485 line.

Franco · 2007-04-03T19:12:51+00:00

Hey guys, fast question: Is it possible to use as a terminationresistor (in a RS-485 bus) a combination of L and C in series instead?I am just trying to find a way to set a termination resistor that doesnot imply such a big load as a pure 120ohm resistor.Cheers...Franco.

Apr 03, 2007 22 Replies

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Franco 19 years ago

Hi Jasen. I did not mention the power wires, but they are being carried together with the differential bus.

I did not think about a wire with higher characteristic impedance. Mmmm, Do you know the consequences of that when using RS485 transceivers???

Cheers...

Franco.

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Rene Tschaggelar 19 years ago

There are none. 100 Ohms differential is standard, there are none others.

Rene

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Michael A. Terrell 19 years ago

Sure there is: 300 ohm twinlead, and 450 ohm open ladder wire used for early TVs and transmitters. Now, all he needs is a time machine.

Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

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