Allen‑Bradley 1746‑C9 Chassis‑to‑Chassis Interconnect Cable 0.91m

Product Overview

The Allen‑Bradley 1746‑C9 is a 36‑inch (0.91‑meter) rack interconnect cable designed specifically for the SLC 500 family of programmable logic controllers from Rockwell Automation -1 -2 -6. As a critical component of the modular SLC 500 architecture, the 1746‑C9 enables the physical and electrical connection of multiple chassis, allowing system integrators to expand I/O capacity beyond a single rack. This ribbon‑style cable establishes the backplane communication link between chassis, ensuring reliable data transfer between the processor and distributed I/O modules.

The 1746‑C9 is engineered for durability and stable performance in industrial environments -5. It features rigid shrink wrap at the end of its connectors, providing strain relief that protects the cable terminations from mechanical stress during installation and maintenance -1 -12. This cable is compatible with several SLC 500 chassis models, including 1746‑A4, 1746‑A7, 1746‑A10, and 1746‑A13, and can connect chassis in a stacked configuration -1 -6. The 1746‑C9 represents a reliable and cost‑effective solution for expanding SLC 500 systems, supporting up to three connected chassis with a total capacity of 30 module slots -5 -2.

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Description

Technical Specifications

Parameter Name	Value
Product Model	1746-C9
Manufacturer	Rockwell Automation / Allen‑Bradley
Product Type	Chassis Interconnect Cable
Series	SLC 500
Cable Length	36 inches (3 feet / 0.91 meters) -1 -7
Cable Type	Ribbon‑style, shielded
Supported Chassis	1746‑A4, 1746‑A7, 1746‑A10, 1746‑A13 -1 -6
Backplane Current (5V)	110 mA -1 -2 -6
Backplane Current (24V)	85 mA -1 -2 -6
Number of Slots Supported	1 per cable -2 -6
Maximum System Expansion	Up to 3 chassis, supporting 30 modules -5
Weight (Approx.)	0.16‑0.35 kg -1 -5 -8
Connection Hardware Compatibility	1746‑RT32, 1492‑CABLE010H, 1792‑IFM40F -2 -6

Main Features and Advantages

The 1746‑C9 enables seamless system expansion by linking multiple SLC 500 chassis, allowing the creation of a larger, more capable control network -2 -5. This interconnect cable extends the backplane communication bus from one chassis to the next, enabling the processor to recognize and control I/O modules across all connected chassis as a unified system. For installations requiring more than the slot capacity of a single chassis, the 1746‑C9 provides a straightforward and reliable means of scaling the system.

The cable features a design specifically suited for vertical stacking of chassis. It incorporates rigid shrink wrap at each connector end, providing effective strain relief that prevents damage to the termination points during installation or movement -1 -12. The flexible ribbon‑style body allows for neat routing within control panels, and its 36‑inch length accommodates installations where chassis are spaced between 6 and 36 inches apart -6 -12. When connecting two 13‑slot chassis in a stacked formation, a minimum clearance of 4 inches between chassis is recommended to ensure the proper bend radius of the cable -1 -12.

The 1746‑C9 is keyed for proper installation, with specific orientation requirements for each connector end. The cable plugs into the left socket of the target chassis and is designed to be installed before the power supply in multi‑rack configurations -7. This keying mechanism ensures correct orientation and prevents incorrect connections. Supporting a backplane current of 110 mA at 5V and 85 mA at 24V, the 1746‑C9 delivers the necessary power to support interconnected module operation -2 -6. Its industrial‑grade construction ensures long‑term reliability in demanding environments, handling vibration and temperature variations common on factory floors -5.