Allen-Bradley 1756-CN2R/B ControlNet Redundant Bridge Module

Allen-Bradley 1756-CN2R/B ControlLogix ControlNet Redundant Communication Module

Disponibilidad: 4 Quedan en stock

The Allen-Bradley 1756-CN2R/B is a Series B ControlNet communication bridge module engineered for the ControlLogix platform. This module provides deterministic,...

Código: 1756-CN2R/B

Manufacturer: Allen-Bradley
Product No.: 1756-CN2R/B
Product Type: Communication Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 430g
Shipping port: Xiamen
Warranty: 12 months

Descripción Reseñas

The Allen-Bradley 1756-CN2R/B is a Series B ControlNet communication bridge module engineered for the ControlLogix platform. This module provides deterministic, high-speed data exchange between controllers, I/O, and field devices, featuring dual-channel redundancy to maintain network integrity during physical cable faults. As a critical component for ControlLogix architectures, it ensures reliable communication in demanding industrial environments.

Features

Redundant Communication: Supports dual-channel coaxial connections, allowing for automatic failover if a primary cable segment experiences a fault, ensuring continuous operation.
Deterministic Throughput: Maintains a steady 5 Mbps data rate, essential for time-critical control applications.
High Capacity: Manages up to 131 total connections, including 128 dedicated Logix connections, across a maximum of 99 network nodes.
Integrated USB Port: Includes a local USB port for configuration and diagnostics at 12 Mbps speed.
Series B Hardware: Updated internal circuitry and firmware to improve reliability and performance within the ControlLogix backplane.

Applications

This module is widely utilized in large-scale automation systems requiring high-speed, deterministic data routing. It is suitable for distributed control systems, remote I/O management, and complex machine integration where network downtime must be minimized through redundant media paths.

Technical Specifications

Model	1756-CN2R/B
Series	Series B
Communication Rate	5 Mbps (ControlNet) / 12 Mbps (USB)
Backplane Current (5.1V)	1300 mA
Power Dissipation	6.7 Watts
Thermal Dissipation	22.9 BTU/hr
Operating Temp	0 to 60 deg C
Slot Width	Single-slot

Installation Guidelines

Power Off: Ensure the ControlLogix chassis is powered down before inserting or removing the module to prevent electrical damage.
ESD Precautions: Use an anti-static wrist strap or grounded work surface when handling the module to protect internal circuitry from electrostatic discharge.
Seating: Ensure the module is properly aligned with the chassis guide rails and fully seated in the backplane connector before securing with the top/bottom latching screws.
Cabling: Use only 1786-RG6 quad-shield coaxial cable for ControlNet connections. Ensure BNC connectors are securely tightened to prevent signal degradation or impedance mismatches.
Environment: Install within an enclosure suitable for the application environment; ensure adequate airflow around the chassis to maintain operating temperatures below 60 deg C.

FAQ

Does the 1756-CN2R/B support redundant power supplies? Yes, the module is compatible with various ControlLogix redundant power supply systems including the 1756-PA75R and 1756-PB75R.

Can I use this in any ControlLogix chassis? It is compatible with standard ControlLogix chassis such as the 1756-A4, A7, A10, A13, and A17 series.

What happens if one ControlNet cable is disconnected? The module features seamless media failover; if one channel fails, the communication traffic is automatically routed through the secondary channel without interrupting the processor's connection to the network.

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