Allen-Bradley ControlNet Compact GuardLogix 1769, User Manual, Page: 59 / 100

Control I/O Chapter 4
Direct Connections for I/O Modules
In this example, assume that each distributed I/O module is configured for a
direct connection to the controller.
ControlNet Adapter with
Three Digital I/O Modules
ControlNet Adapter with
Two Analog I/O Modules
ControlNet Adapter with
Two Digital I/O Modules
The table below calculates the connections in this example.
Table 11 - Connection Calculations
System Connections Amount
Controller to local ControlNet communication module 0
Controller to ControlNet adapter
(1)
Direct connection for digital I/O modules
Direct connection for analog I/O modules
0
5 digital
2 analog
Total connections used 7
(1) In this example, the remote ControlNet adapter uses the communication format of None.
TIP
Direct connections to many modules may not be feasible because the
module supports a finite number of connections, and direct
connections may require more resources than the module has
available.
In this case, use rack-optimized connections. Refer to Rack-optimized
Connections for I/O Modules on page 60 for more information on how
to limit connection use and network traffic.