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Allen-Bradley 1756-CN2 ControlLogix ControlNet capacity bridge module, series C.
Allen-Bradley 1756-CN2R ControlLogix ControlNet communication module supporting redundant ControlNet A/B networks; 30V continuous isolation, USB to backplane.
Allen-Bradley 1756-CN2R ControlLogix redundant ControlNet bridge module, series B.
Allen-Bradley 1756-CN2R ControlLogix redundant ControlNet bridge module, series C.