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Old December 7th, 2017, 07:04 PM   #5
United States

danw is offline
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Join Date: Oct 2004
Location: midwest, USA
Posts: 2,727
I've seen dozens of RS-485 connections before:

Here's a handful of them:

None have a termination terminal.

I have no idea what its purpose is. Termination resistors are installed directly across the (+) and (-) driver lines.
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