Product Summary
The 1768-CNB Allen-Bradley CompactLogix ControlNet interface module delivers deterministic communication for critical automation tasks. It handles 48 connections and 99 nodes at 5 Mbps. This module ensures media redundancy and intrinsic safety for demanding industrial applications.
Product Procurement & Buyer Guide
When selecting a ControlNet interface for your CompactLogix system, the 1768-CNB stands out with robust specifications. It consumes only 5.14 Watts and dissipates 17.5 BTU/hr. This low thermal load reduces cabinet cooling requirements significantly. The module fits exactly one slot (positions 1-4) and draws precisely 1 amp at 5 volts from the backplane.
Engineers need a module supporting up to 48 simultaneous connections. This capacity integrates multiple controllers and remote I/O racks efficiently. The determinism at 5 Mbps ensures timely data delivery for high-speed processes. Media redundancy uses the BNC connector while the NAP connector (RJ45) provides network access port functionality.
For procurement, confirm the operating temperature range spans 0 to 60 degrees Celsius. The nonoperating range extends from -40 to 85 degrees Celsius. This wide tolerance suits many factory and outdoor environments well. The module weighs only 0.26 kilograms and mounts on either a DIN rail or panel. Its compact dimensions measure 132 x 56.7 x 105.1 millimeters.
Certifications include c-UL-us, CE, C-Tick, and CI approvals. These simplify global deployment and compliance with international standards. The module supports redundant controller systems and intrinsic safety applications effectively. It also handles high-speed data transfers and coaxial media redundancy seamlessly.
Expert Technical Evaluation & Performance Review
From a technical standpoint, the 1768-CNB delivers deterministic ControlNet communication at exactly 5 Mbps. This speed meets real-time control requirements for motion and process applications. The module supports a maximum of 99 nodes, enabling large network topologies with minimal latency. Its backplane current draw of 1 ampere at 5 volts remains typical for CompactLogix slots.
The module provides basic isolation rated at 30 volts. For mechanical resilience, it withstands 5g vibration from 10 to 500 Hz and 30g operating shock. Nonoperating shock tolerance reaches 50g. These ratings ensure reliable operation in harsh production environments.
Relative humidity tolerance of 5% to 95% noncondensing allows deployment in humid conditions without corrosion issues. Thermal dissipation of 17.5 BTU/hr remains low, simplifying enclosure cooling design. The module uses one BNC connector for non-redundant coaxial media and one NAP RJ45 connector.
For redundancy, the 1768-CNB integrates easily into redundant controller architectures. It also supports coaxial media redundancy for mission-critical networks. This interface module is an excellent choice for engineers requiring deterministic ControlNet performance and high node counts.
Logistics & Standard Packaging Details
