Allen-Bradley 1768-CNBR CompactLogix ControlNet Bridge Module Overview

Technical Specifications Breakdown

Key parameters for the 1768-CNBR are listed below for quick reference:

Industry Applications

The 5 Mbps communication rate ensures timely data exchange for coordinated motion or discrete control tasks. By enabling redundant media, the 1768-CNBR minimizes downtime risks in critical operations.

Installation & Setup Guidance

Mount the module using DIN rail or panel mount with M4 or #8 screws. It occupies a single slot width. Use the two ControlNet BNC ports for network trunk connections and the RJ45 port for PC programming. Ensure the coaxial RG6 quad shield cable is properly terminated. Verify the isolation voltage rating of 30 Volts (tested at 500 Volts AC for 60 seconds) during system design.

Maintenance & Reliability

Periodically inspect the module for physical damage and ensure all connections are secure. The open style enclosure requires a clean, dry environment. Monitor the T4 temperature code rating for ambient conditions. No specific maintenance intervals are provided; follow standard industrial practices for control modules.

Compatibility & Integration

The 1768-CNBR is compatible with certain Allen-Bradley CompactLogix controllers. It integrates via ControlNet, supporting both BNC and RJ45 physical interfaces. The module works with Series A and B revisions. For system design, refer to the controller's user manual for connection limits.

Selection Guide & Purchasing Advice

When selecting a ControlNet bridge, consider the number of nodes and connections needed. The 1768-CNBR supports up to 99 nodes and 48 connections. It dissipates 5.14W of heat (17.5 BTU/hour). Please verify current lifecycle status and availability with AutoDCSTech before ordering, as this product is listed as Discontinued/Obsolete. AutoDCSTech offers this module for industrial automation needs.

Troubleshooting & Common Issues

If communication faults occur, check ControlNet cable integrity and termination. Verify that the module is properly seated and powered. Ensure the RJ45 programming port is not damaged. For persistent issues, consult the Rockwell Automation documentation for the 1768-CNBR.