Solution:

As you know that the RS-422 can drive as many as 10 receivers, so you can use the ADAM-4520 for the RS-422 network application. You have to setting the individual ID for those RE-422 devices. Following information just for your reference. ADAM-4520 ID#1 ID#2 ID#3 ID#4 ID#5 Tx+ - - - - - Rx+ - - - - - Rx+ - - - - - Rx+ - - - - - Rx+ - - - - - Rx+ Tx- - - - - - Rx- - - - - - Rx- - - - - - Rx- - - - - - Rx- - - - - - Rx- Rx+ - - - - - Tx+ - - - - - Tx+ - - - - - Tx+ - - - - - Tx+ - - - - - Tx+ Rx- - - - - - Tx- - - - - - Tx- - - - - - Tx- - - - - - Tx- - - - - - Tx-