Computer Interfacing
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Burning of RS 485 chips in daisy chain connection

RS 485 chip burning


       Computer Interfacing Forum Index -> RS422 and RS485
Author Message
New User

Joined: 15 Nov 2014
Posts: 1
Location: India

Nov 15, 2014 6:34 am

We have a circuit which master RS 485 module is designed as fail safe mode and (DC GND) connected directly to Earth. It communicates to other RS 485 modules in daisy chain connection with/ with out end node termination & this modules are connected (DC GND) to earth via a RC in parallel network ( 100 R, 0.1 uf) . Now the 485 chip in master module is getting burnt after some days of communication. Can any one help me out what will be the issue. Whether earth is creating issue and if yes why it is.

Jan 21, 2015 3:49 am

Maybe caused by ESD. You must apply ESD diode.

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