The Allen-Bradley 1769-CRR1 is an expansion cable from the CompactLogix product line, designed for use with Bulletin 1769 CompactLogix controllers and I/O modules. This compact I/O communication bus cable enables right-bank to right-bank expansion connections within CompactLogix systems, ensuring reliable data and power continuity between modules. The 1769-CRR1 cable measures 1 foot (305 mm) in length and is engineered for durable, secure connectivity in industrial automation environments. To prevent equipment damage, the cable must be protected from electrostatic discharge (ESD) and should not be connected or disconnected while devices are powered.