Allen-Bradley 1756-CN2R/B Redundant communication module
Specific Parameters
Brand Allen-Bradley (Rockwell Automation, American Brand)
Product Series ControlLogix Series Communication Module
Product Type ControlNet Redundant Communication Module
Model 1756-CN2R/B
Communication Protocol Supporting ControlNet protocol, compatible with CIP industrial protocol
Communication Ports 2 ControlNet ports, 1 USB port (12Mbps full speed)
Transmission Rate Up to 5Mbps
Connection Capacity 128 Logix connections, 131 communication connections
Transmission Distance Without Repeater Maximum 1000 meters per segment, up to 6 kilometers with repeater extension
Adaptable Nodes Supporting 99 network nodes with configurable addresses
Installation Method ControlLogix standard chassis slot installation (compatible with 1756-A4/A7/A10 chassis, etc.)
Power Supply Powered by ControlLogix chassis backplane, no independent power supply required
Operating Temperature Range -20℃ to +60℃
Protection Level IP20
Supported Functions Hot swapping, DLR redundant topology, LLDP network topology identification
Certification Compliant with CSA, UL, CE certifications, compatible with ODVA network specifications
Programming Software Supporting Studio 5000 Logix Designer software configuration
Product Performance
Dual ControlNet port redundant design, which can quickly switch to the standby path when the link is interrupted, ensuring communication continuity and avoiding system shutdown due to network failure.
5Mbps high-speed transmission rate combined with 131 communication connection capacity can meet the data interaction needs of large-scale distributed I/O systems and multi-device collaboration.
Supports long-distance transmission of 1000 meters per segment, which can be extended to 6 kilometers with repeaters, adapting to the network coverage needs of large industrial sites with strong flexibility.
Supports hot swapping function, enabling module replacement or maintenance without shutting down the system, greatly reducing downtime and improving system availability.
Seamlessly compatible with ControlLogix series controllers, power supplies and I/O modules, realizing high-speed data interaction through the backplane with low integration cost.
Built-in USB port facilitates local configuration and debugging. Combined with Studio 5000 software, it can real-time monitor port status, traffic and error frames, making operation and maintenance convenient.
Industrial-grade protection design, stable operation in -20℃ to +60℃ wide temperature environment, strong anti-electromagnetic interference ability, adapting to harsh industrial scenarios.
Compatible with CIP protocol and third-party equipment, enabling bridge communication with EtherNet/IP and DH+ networks, breaking the barrier of heterogeneous systems.
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