Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 130)

Chapter 11
Installation and Wiring
11 – 9
The RS–485 port connects one or multiple DL40s to a computer for
uploading and downloading application files, to trigger messages, and to
connect one or multiple slave displays to the DL40. For additional
information see Chapter 8, Serial Communications.
Figure 11.9
The RS-845 Port
The RS-485 Port Set to
Open Protocol