Allen-Bradley 1769-CRL1 CompactLogix Expansion Cable

Configured for extending 1769 Compact I/O backplane buses across adjacent enclosure banks, the Allen-Bradley 1769-CRL1 (1769-CRL1 Expansion Cable) provides direct physical/electrical execution across right-to-left rack configurations.

Hardware Specifications

Backplane Bus & Deterministic Network Execution

The expansion cable maintains signal integrity across the 1769 Compact I/O backplane bus communication velocity framework, bridging logic communication lines between adjacent I/O banks without signal attenuation. High-density shielding protects high-speed data transmission from electromagnetic interference, enabling seamless system firmware flash compatibility across extended system layouts. The internal conductor layout preserves backplane timing execution and voltage regulation over the 1 ft physical span, allowing flexible I/O density scaling across multi-tier panel enclosures. Onboard bus drivers continuously route 24 VDC backplane power and logic control signals to maintain deterministic updates for attached module banks.

Frequently Asked Questions

Q: What is the primary functional orientation of the 1769-CRL1 expansion cable?

A: The module connects the right end of a primary 1769 Compact I/O bank to the left side of a secondary I/O bank, allowing horizontal or vertical split-bank mounting within an enclosure.

Q: How does this expansion cable affect backplane power consumption and current draw ratings?

A: The cable draws up to 1.4 A at 24 VDC from the backplane bus, with a total power consumption of 33.6 W and maximum heat dissipation of 7.5 W that must be included in system power supply loading calculations.

Field Installation Guidelines

Mount the expansion end-cap module onto an IEC standard DIN rail or fasten it directly to an enclosure panel backplate using M4 screws. Confirm ambient cabinet operating temperatures do not exceed the 0 to 60 deg C operating range.

Route the flexible 1 ft cable assembly away from high-voltage AC conductors, motor cables, and variable frequency drive outputs to minimize noise pickup. Ensure the bend radius of the expansion ribbon remains within standard installation limits to prevent stress on internal conductors.

Verify that both terminal connector ends lock securely into place on the 1769 backplane bus connectors before applying power. Connect enclosure mounting chassis points to a common system ground bar to maintain galvanic shielding continuity along the expansion link.