Rockwell Automation 1770-KF2 Data Highway or Highway Plus Interface Module User Manual - Manual (Page 10)

Introduction
Chapter 1
1-6
In a multi-drop configuration, one intelligent asynchronous device
connects to several Data Highways through sets of modems and KF2
modules. Figure 1.3 illustrates this type of configuration. If the
multi-drop link consists of broadband modems, you can select either
peer-to-peer (full-duplex) or master-slave (half-duplex) communication.
If the multi-drop link consists of baseband modems, you must use
master-slave (half-duplex) communication because baseband modems
support only one communication channel.
Figure 1.3
Multi-Drop Link
11688
KF2 Module
Modem
1775-KA
Module
PLC-3
Processor
1773-KA
Module
PLC-4
Microtrol
1771-KG
Module
Modem
PLC-2/15
Processor
KF2 Module
Modem
Computer
PLC-2
Processor PLC
Processor
1771-KA
Module
Modem
Processor
1774-KA
Module
Computer
KF2 Module
Data Highway Link
Multi-Drop Modem Link
Data Highway Link