Rockwell Automation 2708-DH5B2L_DH5B4L Attended Workstation User Manual
Page 29
Chapter 2
Installing a Network
2–16
As soon as the modems establish communication between themselves, the
remote system will be ready for use.
Extension of a network across telephone lines consists of placing a modem
on one side of the line to connect with the Concentrator, and placing another
modem on the other side to connect with the Submaster.
Figure 2.13
Extending Network Across Common Carrier
Indicates RS-232 connect
Indicates telephone line
Indicates RS-485 backbone
W
|
M
|
W
|
W
|
C
|
W
|
W
W
Workstation
S
Submaster
C
Concentrator
M
Master
W
|
W
|
W
|
S
|
W
Key:
Backbone
Network
Tributary
Network
HOST
modem
modem
Telco
Figure 2.14
Use of the Gateway Option
Indicates RS-232 connect
Indicates telephone line
Indicates RS-485 backbone
W
|
W
|
G
|
W
|
W
W
Workstation
S
Submaster
C
Concentrator
M
Master
G
Gateway
W
|
S
|
W
Key:
Backbone
Network
Tributary
Network
modem
modem
Telco