Product Overview

The Allen-Bradley 1769-CRR3 provides a high-integrity communication bridge between separate 1769 Compact I/O banks. This 3-foot (0.9-meter) cable utilizes a "Right-to-Right" orientation, allowing engineers to connect the right side of one I/O bank to the right side of a subsequent bank. This physical flexibility allows the system to span across multiple DIN rails or skip over obstacles within a control cabinet. We supply this cable in 100% Brand New original condition, ensuring your backplane data remains synchronized and error-free.

Technical Specifications

The 1769-CRR3 incorporates heavy-duty shielding to maintain bus signal quality over its 0.9-meter length.

Engineering Advantages

The 1769-CRR3 enables modular cabinet layouts that standard rigid bus connectors cannot accommodate.

• Flexible Cabinet Layouts: The 3-foot length overcomes the rigid constraints of standard horizontal I/O banks. This cable permits "stair-step" or "side-by-side" rail configurations, which is essential when retrofitting existing control panels with limited horizontal space.

• Deterministic Backplane Communication: High-quality twisted-pair construction and internal shielding prevent electromagnetic interference (EMI) from corrupting backplane data. This ensures the controller maintains a consistent scan time across all expanded I/O banks.

• Mechanical Vibrational Security: The integrated locking connectors prevent accidental disconnection in high-vibration applications like stamping presses or vibrating conveyors. A secure physical lock maintains electrical continuity for critical machine protection signals.

• Streamlined Multi-Bank Expansion: By using the Right-to-Right orientation, you can optimize the internal wiring of your enclosure. The 1769-CRR3 allows the system to "fold" back onto itself, keeping the PLC rack centralized while distributing I/O modules where needed.

• Rugged Industrial Jacket: The cable jacket withstands the harsh temperatures and chemical exposure typical of industrial manufacturing, preventing insulation breakdown and signal leakage over the life of the system.

FAQs

• Does the 1769-CRR3 require an end cap?

  Yes. You must install a Right End Cap (1769-ECR) or a Left End Cap (1769-ECL) on the last physical bank of the expanded system to terminate the communication bus properly.

• Can I use this cable to connect to a different PLC series?

  No. The 1769-CRR3 is proprietary to the 1769 Compact I/O bus. It only functions with CompactLogix controllers, MicroLogix 1500, or 1769-series distributed I/O adapters like the 1769-AENTR.

• Do I need an additional power supply for the expanded rack?

  Yes. Expansion cables carry logic signals but cannot distribute enough power for multiple modules over long distances. Each bank connected via a 1769-CRR3 requires its own 1769-PA2, 1769-PB2, or 1769-PA4 power supply.

• What is the difference between 1769-CRR3 and 1769-CLL3?

  The "CRR" stands for Right-to-Right, and the "CLL" stands for Left-to-Left. Your choice depends on which side of the module rack you intend to exit and enter. Check your physical rack layout to determine which cable orientation avoids cable strain.