Direct Connections - Allen-Bradley 1756-IF8I User Manual

Chapter 1 Analog I/O Module Operation in the ControlLogix System

Direct Connections

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• Remote chassis - A chassis that does not contain the module's owner-
controller but is connected to the local chassis over the EtherNet/IP™
network or ControlNet™ network.
Local Chassis
Controller
The Logix Designer application transfers configuration data to the controller
during the program download. Then, data is transferred to the I/O modules in
the local and remote chassis.
The I/O module can operate immediately after the project download from the
owner-controller is complete.
A direct connection is a real-time data transfer link between the controller and
the device that occupies the slot that the configuration references.
IMPORTANT ControlLogix analog I/O modules support only direct connections.
When you download module configuration to a controller, the controller
attempts to establish a direct connection to each module referenced by the
configuration.
Rockwell Automation Publication 1756-UM540E-EN-P - December 2017
Remote Chassis
EtherNet/IP Network I/O Modules