The Allen-Bradley 1756-CN2R is a high-performance ControlNet bridge module designed for use in the Rockwell Automation Logix 5000 family of controllers. It serves as a critical interface between the ControlNet network and the backplane of a 1756 chassis, enabling deterministic, real-time communication for industrial automation systems. This module supports redundant media operation, providing enhanced network reliability by automatically switching between primary and secondary cables in the event of a fault. The 1756-CN2R is ideal for applications requiring high-speed data exchange, such as discrete manufacturing, process control, and safety systems, where network uptime is paramount. With its robust design, it ensures seamless integration with other ControlNet devices, including drives, I/O, and human-machine interfaces, while offering comprehensive diagnostics for proactive maintenance.
| Parameter |
Specification |
| Product Type |
ControlNet Bridge Module |
| Model Number |
1756-CN2R |
| Network Media |
Coaxial Cable (RG-6 or similar) |
| Connector Type |
BNC (Female) |
| Data Rate |
5 Mbps |
| Maximum Nodes per Segment |
48 |
| Redundancy Support |
Yes, Redundant Media (A and B cables) |
| Backplane Current Draw |
1.5 A at 5.1 V DC (typical) |
| Power Dissipation |
7.65 W (maximum) |
| Operating Temperature |
0°C to 60°C (32°F to 140°F) |
| Storage Temperature |
-40°C to 85°C (-40°F to 185°F) |
| Relative Humidity |
5% to 95% (non-condensing) |
| Enclosure Type |
Open-style (suitable for panel mounting) |
| LED Indicators |
Network Status, Module Status, Link Activity, Fault |
| Network Protocol |
ControlNet (CIP-based) |
| Chassis Slot Requirement |
Single slot in 1756 chassis |
| Maximum Cable Length |
1000 m per segment (without repeaters) |
| Certifications |
UL, CE, CSA, ATEX (when installed in appropriate enclosure) |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22