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The confusion may have come from the presence of a Device-Level Ring (DLR) Ethernet port on the controller.
Because the DLR Ethernet architecture can tolerate a single broken cable in the ring, someone may have considered that to be a "Redundant" feature, even though it is more properly called a "fault tolerant" feature.
The only platforms that Rockwell Automation designs, advertises, sells, and supports for Redundancy are the Allen-Bradley ControlLogix Redundancy system and the ICS Triplex AADvance and Trusted controllers.
There is a CompactLogix based architecture that provides "hot backup" of controllers using DeviceNet networking, but it is not a true "Redundant" system because it does not support most of the features that a Redundant system would need, including automatic data table crossloading, bumpless transfer of control outputs, automatic edit crossloading, integrity checking, and fault-tolerant networking.
The CompactLogix DeviceNet hot backup requires a controller that supports the 1769-SDN DeviceNet Scanner, like the 1769-L30ER.
The 1769-L16ER is the smallest CompactLogix controller and uses the 1734 POINT architecture, not the 1769 Compact architecture.