Product Details
Product Overview
The Allen Bradley 1768-CNBR functions as a high-performance communication interface for the CompactLogix™ platform. This module enables a 1768-L4x controller to bridge data between the local backplane and a ControlNet network. We supply this unit as 100% Brand New and Original, providing the "R" suffix capability for redundant media support. It serves as a critical link for deterministic, repeatable data transfers in complex distributed I/O architectures and multi-controller interlocking.
Technical Specifications
The 1768-CNBR integrates high-speed networking into the CompactLogix chassis with the following parameters:
| Feature | Specification |
| Module Type | ControlNet Bridge Module |
| Redundancy Support | Dual BNC Connectors (Media Redundancy) |
| Product Line | CompactLogix |
| Communication Rate | 5 Mbps |
| Backplane Compatibility | 1768 Series Chassis |
| Series | A and B |
| Weight | 0.56 lbs (0.26 kg) |
| UPC | 612598307500 |
| UNSPSC | 32151705 |
Engineering Advantages
-
Redundant Media Security: The "R" designation signifies support for redundant ControlNet media. The dual BNC ports allow for a secondary cable path. If a cable break occurs, the module switches paths instantly without interrupting the control process, preventing costly system downtime.
-
Deterministic Data Execution: Unlike standard Ethernet, the 1768-CNBR utilizes the ControlNet protocol to ensure time-critical I/O data arrives at fixed intervals. This eliminates network collisions and "jitter," providing the precision required for high-speed motion and synchronized machinery.
-
Streamlined ControlNet Bridging: The module acts as a transparent gateway, allowing your CompactLogix controller to communicate with remote 1794 FLEX™ I/O or 1715 Redundant I/O racks. It offloads communication tasks from the main CPU, maintaining high logic execution speeds.
-
Hot-Swappable Configuration: The hardware supports Removal and Insertion Under Power (RIUP). Engineers can replace a module without shutting down the entire rack power, significantly reducing mean time to repair (MTTR) during maintenance cycles.
-
Rugged 1768 Chassis Fit: The module slides directly into the high-speed 1768 bus. This dedicated bus structure provides higher bandwidth than standard 1769 backplanes, facilitating rapid data exchange between the bridge and the L43 or L45 processors.
FAQs
-
Does the 1768-CNBR require an external power supply?
No. The module draws its operating power directly from the 1768 backplane. Ensure your system power supply (such as a 1768-PA3 or PB3) has sufficient capacity for the communication bridge and the controller.
-
Can I use this module in a 1769-only CompactLogix system?
No. The 1768-CNBR specifically requires a 1768-L43 or 1768-L45 controller and a 1768 series chassis. It will not physically fit or function in a standard 1769-series CompactLogix rack.
-
Is this a refurbished or used unit since the series is discontinued?
We guarantee this 1768-CNBR is 100% Brand New and Original. It remains in its factory-sealed Allen Bradley packaging with the verifiable UPC (612598307500) and quality control seals intact.
-
How do I set the network address for this module?
You set the ControlNet node address via the two rotary switches located on the side of the module. Ensure you select a unique address (1 to 99) before inserting the module into the chassis.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Navigating Industrial Automation Failures: Types, Causes, and Mitigation Strategies
Modern manufacturing relies heavily on automated control systems to maximize throughput and maintain product quality. However, unplanned downtime in industrial automation can cost facility operators thousands of dollars per hour. Understanding how programmable logic controllers (PLCs), distributed control systems (DCS), and field instrumentation fail empowers engineering teams to implement robust preventive maintenance strategies.
Essential Motion Control Commands: A Practical Guide for Engineers
Automation engineers often rely on precise position and speed control to drive modern factory machinery. Modern industrial systems, such as Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), depend heavily on standardized motion instructions. Mastering these commands ensures operational safety, protects mechanical components, and optimizes cycle times across production lines.
The Role of Intrinsic Safety Barriers in PLC and DCS Architectures
Implementing robust protection in hazardous industrial environments represents a fundamental safety requirement in factory automation. Process facilities often handle volatile gases, dusts, and chemical agents that pose significant combustion risks. Consequently, control system engineers must deploy energy-limiting interfaces to isolate safe-area control cabinets from hazardous-area field instrumentation. This article examines the function, selection, and electrical principles of intrinsic safety barriers within modern PLC and DCS networks.