User manual

Publication CNET-UM001C-EN-P - November 2005
Control I/O 4-7
Rack Optimized Connections for I/O Modules
In this example, assume that each digital I/O module is configured for a rack
optimized connection to the controller. Analog modules must be configured
for direct connections.
This table calculates the connections in this example.
The rack optimized connection conserves connections, but can limit the status
and diagnostic information that is available from the digital I/O modules.
To increase the number of available connections, use a rack optimized
connection to any remote adapter with multiple digital I/O modules that allow
rack optimized connection, instead of direct connections to those I/O
modules.
ControlNet Network
I/O
I/O
I/O
I/O
I/O
I/O
Controller with ControlNet
Communication Module
ControlNet Adapter with
Digital I/O Modules
ControlNet Adapter with
Analog I/O Modules
ControlNet Adapter with
Digital I/O Modules
Table 4.4 Connection Calculations
System Connections Amount
Controller to local ControlNet communication module 0
Controller to ControlNet adapters with digital modules
(rack optimized connection to each adapter)
2
Controller to ControlNet adapter with analog modules
(direct connection for each analog I/O module)
0
2
total connections used: 4