1756-CN2R | Allen-Bradley Redundant ControlNet Module for ControlLogix Chassis

Allen-Bradley · HMIs & Displays

Description  The Allen-Bradley 1756-CN2R is a ControlLogix communication module designed to establish ControlNet connectivity within distributed and redundant automation networks. It supports dual BNC ControlNet interfaces operating at 5 Mbps and includes a USB port for local configuration. With capacity for up to 128 Logix connections, the module enables high-performance, deterministic communication in large industrial systems.     Technical Specifications  Condition New/Never Used Surplus Brand Allen-Bradley Category Communication Modules Part Number 1756-CN2R Subcategory ControlLogix ControlNet Modules Series ControlLogix Module Type Bridge / Communication Module ControlNet Ports Two (2) BNC ControlNet ports USB Port USB 1.1, 12 Mbps ControlNet Data Rate 5 Mbps Maximum Logix Connections 128 Maximum Total Connections 131 Maximum Nodes 99 Backplane Current Draw 1.3 A at 5.1 VDC; 3 mA at 24 VDC Isolation Voltage 30 VDC continuous; tested at 500 VAC for 1 minute Thermal Dissipation 22.9 BTU/hr Operating Temperature 0 to 60 °C (32 to 140 °F) Humidity 5–95% non-condensing Shock Rating 30 G Vibration Rating 2 G, 10–500 Hz Compatible Chassis All 1756 ControlLogix chassis Compatible Power Supplies 1756-PA72, PA75, PB72, PB75, PC75, PH75; redundant: PA75R, PB75R, PSCA2 Weight 0.293 kg (0.64 lb)     Information About 1756-CN2R The 1756-CN2R is part of the ControlLogix platform and is built to provide redundant ControlNet communication within modular Logix architectures. It installs into any standard ControlLogix chassis and is compatible with both standard and redundant 1756 power supplies. The module supports a multi-node coaxial network structure using approved RG6 cabling, allowing long-distance I/O distribution and integration with HMIs and SCADA systems. Designed with robust isolation, wide temperature capability, and full-speed USB configuration support, it meets the demands of continuous industrial communication. Key Features: Redundant ControlNet Ports: Dual BNC connections support redundant coaxial network paths for fault-tolerant operation. High Connection Capacity: Supports up to 128 Logix connections and 131 total communication connections. Fast Network Throughput: Operates at 5 Mbps for deterministic industrial control communication. USB Configuration Port: Full-speed 12 Mbps USB provides convenient local module setup. Chassis Flexibility: Installs into any ControlLogix chassis with a single slot width. Wide Environmental Ratings: Operates from 0 to 60 °C with 30 G shock resistance and 2 G vibration tolerance. Industry-Standard Cabling: Uses 1786-RG6 quad-shield coax for ControlNet trunk and drop connections. High Node Capacity: Supports up to 99 nodes per ControlNet segment for extensive distributed architectures. The 1756-CN2R delivers the reliability and precision required for secure industrial networking and coordinated multi-device communication.

Brand: Allen-Bradley · Category: HMIs & Displays

Key features

• Redundant ControlNet Ports: Dual BNC connections support redundant coaxial network paths for fault-tolerant operation.
• High Connection Capacity: Supports up to 128 Logix connections and 131 total communication connections.
• Fast Network Throughput: Operates at 5 Mbps for deterministic industrial control communication.
• USB Configuration Port: Full-speed 12 Mbps USB provides convenient local module setup.
• Chassis Flexibility: Installs into any ControlLogix chassis with a single slot width.
• Wide Environmental Ratings: Operates from 0 to 60 °C with 30 G shock resistance and 2 G vibration tolerance.
• Industry-Standard Cabling: Uses 1786-RG6 quad-shield coax for ControlNet trunk and drop connections.
• High Node Capacity: Supports up to 99 nodes per ControlNet segment for extensive distributed architectures.

Specifications

Contact Safety Shops for pricing, delivery and project support in the UAE.