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No. 469 RS-485 & LAN - Collision on 485 BUS 2008-12-11

Hello, we have 12 devices connected in a RS-485 bus. Those devices must communicate to a computer. The only line between the devices and the computer is a LAN, so i've thinking to use the EZL-200F. I'm doing this test on my lab and i'm seeing sometimes that we have collision on the 485 BUS (when the device answer collisions with a request from the computer). How could i fix this collision problem?

Writer Leo Company