Rockwell Automation Publication 5069-UM004A-EN-P - April 2019 29
Digital Module Operation in a Control System   Chapter 1
Ownership
Every I/O module in a Logix 5000 control system must be owned by a 
controller, also known as the owner-controller. When a Compact 5000 I/O 
digital module is used in a Logix 5000 control system, the owner-controller 
performs the following:
• Stores configuration data for every module that it owns.
• Can reside in a location that differs from the Compact 5000 I/O 
digital modules. 
• Sends the I/O module configuration data to define module behavior 
and begin operation in the control system.
Each Compact 5000 I/O digital module must continuously maintain 
communication with its owner-controller during normal operation. 
Typically, each I/O module in a system has only one owner-controller. Output 
modules are limited to one owner-controller. 
Multiple Owners of Compact 5000 I/O Digital Input Modules
Typically only one owner-controller is connected to a Compact 5000 I/O 
digital input module. However, multiple Logix 5000 controllers can connect to 
Compact 5000 I/O digital input modules as owner-controllers.
In this case, the following conditions must exist:
• The controllers maintain the same configuration.
• The configuration in each controller uses a Data connection to the 
input module. 
• The first controller to make a connection to the input module is the 
only controller that can change the connection. Therefore, it is ‘owns’ 
the module configuration.
5069-OBV8S
SIL2 CPU
5069-L3100ERMS2
Compact GuardLogix 
5069-OBV8S
5069-IB8S5069-IB8S
OUTPUT OUTPUT
SA Power MOD Power
DC INPUT
5069-IB16
DC OUTPUT
5069-OB16
ANALOG INPUT
5069-IY4
SA Power MOD Power
ANALOG OUTPUT
5069-OF8
DC INPUT
5069-IB16
Standard Modules
Safety Modules
™
NET B1
LINK B1
NET A1
LINK A1
NET A2
LINK A2
SPEED X1
LINK X1
OK
RUN
FORCE
FAN 1
SD
FAN 2
CompactLogix 5480
B1
A1
1
2
A2
5069-L46ERMW
CONTROLLER
UPS
MP
SA
R
B
F
R
B
F
DC INPUT
5069-IB16
DC OUTPUT
5069-OB16
ANALOG INPUT
5069-IY4
ANALOG OUTPUT
5069-OF8
DC INPUT
5069-IB16
IMPORTANT If the controller that owns the module configuration changes the 
configuration, the other controllers are not notified of the changes.
For more information, see 
Configuration Changes in an Input 
Module with Multiple Owners on page 30.