Combining Direct And Rack Optimized Connections - Allen-Bradley ControlLogix User Manual

Select Rack Optimized for a
rack connection
Using a Rack Optimized Connection and a Direct Connection with I/O in a Remote Chassis
Local chassis
Owner Logix 5550
Controller
To configure an I/O module for a rack optimized connection, you select the
Rack Optimization communication format. Most discrete I/O modules
support a rack optimized connection. If this option does not appear when
you are selecting communication format for an I/O module, the module
does not support the rack optimized connection.

Combining direct and rack optimized connections

A remote chassis can have both a rack optimized connection and direct
connections to analog or digital I/O. In this example, the owner controller
uses a rack optimized connection to communicate with two digital I/O
modules. The owner controller also uses a direct connection to
communicate with an analog module in the same chassis.
Rack optimized
connection
O
I
U
N
T
P
P
U
U
T
Slot 3 RPI = 25mS
T
ControlNet
Interface Module
Allocating Communication Connections
ControlNet
ControlNet
Interface module
Remote chassis
O
I A
U
N N
T
P
A
P
U L
U
T
O
T
G
41030
1756-6.5.3 - December 1999
A-5