Allen-Bradley 1769-ECR Right End Cap For 1769 Compact I O

Allen-Bradley 1769-ECR Right End Cap is the termination accessory for the 1769 Compact I/O system, designed to cap the right end of a Compact I/O rack and complete the backplane bus at the system’s far end. This official right-end cap is installed to terminate the I/O bus on the rack’s right side, a requirement described in Rockwell Automation installation guidance for Compact I/O systems. Manufactured by Rockwell Automation (Allen-Bradley), the 1769-ECR works with 1769 Compact I/O modules to ensure proper electrical termination and signal integrity of the bus. For complete end-to-end termination, Rockwell also lists a right-end-cap variant 1769-ECRK and left-end-cap options 1769-ECL/ECLK to terminate both ends of a Compact I/O bank; selecting the correct end cap depends on the orientation of your chassis. In typical 1769 Compact I/O deployments, using the appropriate end cap on the rack’s rightmost position is essential to maintain proper termination and enclosure integrity.