1769-CRR1 Allen-Bradley Bus Expansion Cable

Allen-Bradley 1769-CRR1 Compact I/O Bus Expansion Cable

Allen-Bradley 1769-CRR1 Compact I/O Bus Expansion Cable

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Allen-Bradley 1769-CRR1 Compact I/O Bus Expansion Cable The Allen-Bradley 1769-CRR1, also cataloged as the 1769-CRR1 Bus Expansion Cable, operates as...

SKU: 1769-CRR1

Manufacturer: Allen Bradley
Product No.: 1769-CRR1
Product Type: PLC Bus Expansion Cables
Product Origin: USA
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Allen-Bradley 1769-CRR1 Compact I/O Bus Expansion Cable

The Allen-Bradley 1769-CRR1, also cataloged as the 1769-CRR1 Bus Expansion Cable, operates as a dedicated hardware component for extending high-speed backplane signals across multi-rack I/O layouts within CompactLogix and MicroLogix 1500 controller platforms. Configured to connect the right side of an active I/O bank to the right side of a subsequent bank, this 0.3 meter interconnection maintains low-impedance bus communications across physically separated DIN rail assemblies.

Hardware Specifications

Parameter	Specification
Model	1769-CRR1
Brand	Allen-Bradley / Rockwell Automation
Origin	USA
Weight	0.30 kg
Dimensions	Cable Length: 0.3 m (1.0 ft)
Operating Temp	0 to +60 deg C
Power Consumption	Passive (Powered via backplane bus)
Series	1769 Compact I/O
Cable Type	Right-Bank to Right-Bank Expansion
Function	Communication Bus Extension
Enclosure Type	Open Style Cable Assembly
Compatibility	CompactLogix, MicroLogix 1500 System Banks

Backplane Bus Communication & Shielding Characteristics

The module maintains system backplane bus communication velocity across split-rack structures by preserving high-frequency signal propagation and deterministic data throughput. Heavy-duty internal shielding provides robust immunity against high-level electromagnetic noise generated by nearby motor controllers and switching drives, preventing logic corruption over the extended bus connection. Integrated mechanical connector latches lock the assembly to adjacent Compact I/O expansion end caps, maintaining continuous contact integrity under high-vibration industrial conditions.

Frequently Asked Questions

Q: Does the installation of a 1769-CRR1 expansion cable eliminate the need for an additional power supply on the secondary bank?

A: No. The expansion cable transfers logical communication bus signals but does not distribute sufficient system power across banks. Every expanded bank created via a 1769-CRR1 cable requires a dedicated 1769 power supply module (such as a 1769-PA2 or 1769-PB2) installed on that specific rail.

Q: What physical layout constraint distinguishes the 1769-CRR1 from the 1769-CRL1 cable?

A: The 1769-CRR1 features right-bank to right-bank terminal headers, designed specifically for vertical split-rail panel configurations. In contrast, the 1769-CRL1 bridges a right-bank terminal header to a left-bank expansion header.

Q: How many 1769 expansion cables can be deployed within a single controller system?

A: A single controller system typically supports a maximum of two expansion cables (allowing up to three total I/O banks). The precise limit depends on the power supply distance rating of the controller and the total module count per bank.

Field Installation Guidelines

Mount all DIN rails securely and ground the enclosure backplate prior to routing the expansion cable. Connect the 1769-CRR1 right-bank connector to the rightmost module or power supply of the primary I/O bank, ensuring the side-locking interlocks snap fully into place. Route the cable straight to the adjacent bank without exceeding the minimum bend radius, avoiding sharp bends that may stress internal conductors or foil shielding. Verify that high-voltage power lines and motor drive wiring maintain a minimum clearance of 200 mm from the expansion cable pathway. Install a dedicated 1769 power supply on the expanded bank before applying system power, and confirm that all end caps are properly seated to prevent open backplane terminations.

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