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Enables modular expansion of I/O modules without complex wiring modifications. Supports power and data communication between I/O racks. Constructed to withstand industrial environments with resistance to vibration and shock. Operates reliably across 0°C to 60°C (32°F to 140°F). Complies with industrial standards and certifications (CE, UL, CSA). The 1769-CRR1 is a 1-foot (305 mm) right-to-right bus expansion cable designed to connect multiple I/O banks in Allen-Bradley’s Compact I/O systems, such as CompactLogix and MicroLogix 1500 controllers. It facilitates the expansion of digital and analog I/O modules by linking their backplanes, allowing up to three I/O banks to be integrated within one control system.