Advantech ADAM-5000 - Manual (Page 58)

Chapter 5
5-3
Communication Backup Function
With the ADAM-5090 you can implement dual communication channels
between your PC and the ADAM system. Even when one of the two
communication channels is down, your system can still function through the
alternative communication channel. This dual communication channels can
be implemented by application software.
Figure 5-1: ADAM-5090 Module
Figure 5-2: ADAM-5090 Application Wiring