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The 1769-CRL3 (Part Number: 1769-CRL3) is a high-reliability bus extension cable designed for the Allen-Bradley CompactLogix and DriveLogix 5730 systems. This cable is a critical passive component used to bridge the communication backplane between two...
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The 1769-CRL3 (Part Number: 1769-CRL3) is a high-reliability bus extension cable designed for the Allen-Bradley CompactLogix and DriveLogix 5730 systems. This cable is a critical passive component used to bridge the communication backplane between two separate I/O banks. Specifically, it functions as a "Right Bank to Left Bank" connector, allowing the system to extend beyond the physical limits of a single chassis or power supply capacity.
By utilizing the 1769-CRL3, engineers can implement a multi-bank architecture. A standard 1769 system supports a maximum of two expansion cables, enabling a total of three distinct I/O banks. This feature is particularly useful in dense control cabinets where horizontal space is limited, as the cable allows the mounting of I/O banks on separate DIN rails in either horizontal or vertical orientations.
| Specification | Details |
|---|---|
| Cable Type | Right-to-Left Bank Expansion |
| Length | 1.0 meter (3.28 feet) |
| System Compatibility | CompactLogix, DriveLogix 5730, and 1769 Compact I/O modules |
| Maximum Banks Supported | 3 banks (1 local, 2 expanded) |
| Function | Backplane bus communication extension |
| Weight | 0.20 kg |
| Configuration Flexibility | Supports both vertical and horizontal layouts |
| Bus Current Draw | Negligible (Passive component) |
| Connector Type | Proprietary 1769 high-density bus interface |
The 1769-CRL3 is primarily used in large-scale automation projects where the I/O count exceeds the capacity of a single power supply. It is also frequently employed in "Split-Chassis" designs to distribute I/O modules across different areas of a control enclosure to improve heat dissipation or organization.
Does the 1769-CRL3 require its own power supply?
No, the cable is a passive component. However, every new bank created by the addition of this cable requires its own 1769-PA2, 1769-PB2, or 1769-PA4 power supply to power the modules in that specific bank.
What is the difference between a Right-to-Left and a Left-to-Right cable?
A Right-to-Left cable, like the 1769-CRL3, connects from the right side of the first bank to the left side of the subsequent bank. This is the standard progression for expanding 1769 systems.
