Allen-Bradley 1771-KRF/B User Manual page 15

Data Highway Plus on Broadband Configuration
Broadband cable and modems now replace daisy-chained twinaxial media
and offer a greater distance between nodes as well as multiple networks
coexisting on one cable. Figure 2.2 shows a typical DH+ on broadband
configuration where KRFs create a single DH+ link.
Figure 2.2
DH+ on broadband configuration
VAX or any
asynchronous
host
1770 KF2
baseband cable
KRF
Data Highway Plus on broadband
Translator
KRF
PLC 2
1785 KA3
Table 2.B explains the configuration in figure 2.2:
Table 2.B
Configuring a single DH+ link on the broadband network
These Devices
KRFs + 1784 KT Communication Adapter
Modules
KRFs + 1785 KA3 Communication Adapter
Modules
KRFs + built in DH+ port of the PLC 5
KRFs + 1785 KE DH/RS 232 Communication
Controller Modules
KRFs + 1770 KF2 DH/RS 232 Communication
Interface Module
Chapter 2
Guidelines for Connecting the 1771 KRF
Advisor PC
RS 232
1785 KE
KRF
KRF KRF
PLC 2
PLC 5
1785 KA3
Connect this to the DH+
Broadband Link
T 50s, T/35s, IBM AT/XT and
compatible computers
PLC 2s
PLC 5s
host computers
host computers
T 50
1784 KT
100 ft max
KRF
KRF
PLC 5
17272
2 5