Network Device Requirements and Restrictions
Network devices in a high availability system that is
CIP Security™
-enabled have the following requirements and restrictions.Cannot Connect I/O Devices Through a Secured 1756-EN4TR Module
You cannot connect I/O devices to the 1756-EN4TR communication module that is
CIP Security™
-enabled. You must use separate communication modules to connect I/O devices to the
redundant chassis pair. Communication modules that are not CIP Security™
-enabled are not required to be 1756-EN4TR modules.Cannot Connect Remote I/O to a Secured Communication Module
CIP Security is Not Supported on Redundant Adapter Pairs
You cannot deploy the security policy to 1756-EN4TR communication modules in a redundant
adapter pair (RAP). You must deploy the security policy to a dedicated 1756-EN4TR
communication module.
You can include 1756-EN4TR communication modules that are configured as a RAP in the same
chassis as a
CIP Security™
-enabled communication module as long as the modules in the RAP are not CIP Security™
-enabled.For more information redundant adapter pairs, see the ControlLogix EtherNet/IP Network Devices User Manual, publication 1756-UM004.
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