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Post# A1089809

Eight Stories You Didn’t Know About RS485 Standard (Henin-Beaumont)

Posted on: Tuesday, 21 May, 2024  00:48
Updated On: Tuesday, 21 May, 2024  00:51
Expires On: Monday, 15 February, 2027  07:48
Reply to: (Not Shown)
It then travels back to the source and will reflect off of it (at the driver's end).
Since the RS-485 driver is "made passive" (disconnected from the wires) when not transmitting, and the other end of the cable can then drive the network, a termination resistor should be added to both ends. With no driver connected, the differential voltage on the wires will depend on the termination resistor and biasing.

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