End Module, CompactLogix, Right End Cap, to Close off End of I/O Bank, Included in 1769-L23x Controller, Do not need to OrderThe 1769 Compact I/O™ controllers, such as the 1769-L32E, require end caps. A 1769-ECR right end cap, a 1769-ECRK right end cap, a 1769-ECLK left end cap, or a1769-ECL left end cap terminates the end of the communication bus. Use this guide to install either end cap.