The Allen-Bradley 1768-CNBR serves as the primary 1768-CNBR ControlNet Bridge Module utilized to execute deterministic I/O and peer-to-peer messaging across CompactLogix L4X controller platforms.

Suffix Breakdown & Model Matrix

The 1768-CNBR is available in Series A and Series B revisions. These hardware iterations maintain form-factor compatibility within the 1768 system, supporting redundant media configurations for ControlNet network topology. Functional consistency is maintained across revisions, though users must verify firmware compatibility with the host L4X processor prior to system integration.

Hardware Specifications

Industrial Network Communication

The module utilizes standard Allen-Bradley backplane bus communication velocity settings for data exchange with the local controller. It provides deterministic connectivity required for time-critical control loops. The architecture supports redundant media to maintain link integrity in high-EMI industrial environments, ensuring consistent packet delivery. Firmware flash compatibility is managed via the controller's programming software, allowing for systematic updates and parity checks across the network node list.

## Ordering info

• 1x 1768-CNBR ControlNet Bridge Module

• Anti-static protective packaging

• Installation reference sheet

Field Deployment Procedures

Installation of the 1768-CNBR requires mounting within the designated 1768-series I/O platform. Ensure the module is fully seated into the backplane connector before applying power. Shielded RG-6 quad-shield coaxial cable is required for ControlNet connections to maintain signal integrity and meet compliance standards. Use BNC connectors and appropriate T-taps for network drops. Ground the network cable shield at one point only to prevent ground loops, adhering to local electrical code specifications regarding industrial network cabling.

Dispatch Protocols

Delivery time: 2-7 days when payment finish. All hardware is processed through major logistics providers including DHL, FEDEX, or UPS. Each module is secured within anti-static industrial packaging to mitigate electromagnetic interference and physical vibration during transit, ensuring the unit reaches the site in a calibrated state.

Technical Inquiries

Q: Does the 1768-CNBR support Removal and Insertion Under Power (RIUP)?

A: Yes, the module supports RIUP when installed in a 1768 CompactLogix platform, provided the backplane power is stable and environmental conditions are within the specified operational limits.

Q: How is redundancy configured on this module?

A: Redundancy is implemented through the physical cabling of two distinct ControlNet channels to the module. Configuration of the redundancy mode is handled via the network scheduling software (RSNetWorx for ControlNet).

Q: Can this module be used in a non-redundant configuration?

A: Yes. The 1768-CNBR is backward compatible with non-redundant ControlNet topologies. If only one cable is connected, the module functions as a standard ControlNet bridge.

Q: What is the maximum data update rate supported?

A: The data update rate is defined by the network schedule (NSI) and the number of nodes present on the network, limited by the ControlNet protocol specifications (typically 5 Mbps base rate).