Rockwell Automation 1747-KE,D17476.12 DH-485/RS-232C Interface Module - Manual (Page 109)

Publication 1747-UM005B-EN-P - March 2006
Application Examples 8-21
Once the proper connections are verified, the AB_DF1-1 driver can be
tested.
IMPORTANT
Before continuing, the PC modem must be
connected to a working outside phone line and the
network modem must be connected to the incoming
phone line specified in the phone book.
Also, the network modem must be connected to a
working Allen-Bradley network.