AnsweredAssumed Answered

single uart with three ADM2587E

Question asked by ilario on Feb 23, 2012
Latest reply on Feb 29, 2012 by ilario

Hi all,

I need to multiplex one single uart port over three different (separated) rs-485 systems.

I can only work on master side, slaves/cabling are already in place and cannot be modified.

 

Situation:

- single rs-485 master (microcontroller with only one uart port)

- each rs-485 sub-system built with about 700mt shielded twiestd pair cable with multiple rs-485 slaves (that may or may not have isolated interface)

- a slave can only send data when master ask it to do

- 19200bps or slower speed, half-duplex

 

What do you think about following solution?

Thank you

triple adm2587e on single uart.bmp

Outcomes