Allen Bradley

Allen Bradley ControlLogix 1756-CN2R ControlNet Module

Allen Bradley ControlLogix ControlNet Communication Module

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ManufacturerAllen Bradley
Part number1756-CN2R
Module Type Bridge Module
Network ControlNet
Ports 2x BNC ControlNet, 1x RJ45 ControlNet, 1x USB 1.1
Speed 5 Mbps
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12-month warranty
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Veteran-owned
CAGE: 9NK75
Redundant ControlNet Ports 5 Mbps Communication Speed Supports Up to 99 Nodes ControlLogix Chassis Mountable USB Configuration Port High Reliability

The Allen-Bradley 1756-CN2R is a ControlLogix communication module designed to provide redundant ControlNet connectivity within industrial automation systems. It features dual ControlNet BNC ports, enabling high-speed communication at 5 Mbps, and supports up to 99 nodes on the network. This module is essential for establishing reliable and deterministic communication in complex control architectures.

This module is integral to ControlLogix systems, facilitating peer-to-peer communication and integration with HMIs and SCADA systems. It installs directly into a ControlLogix chassis and is compatible with both standard and redundant power supplies, making it a versatile component for building robust control solutions. Its operational temperature range is 0 to 60°C.

Stanlo Automation, your veteran-owned surplus industrial parts distributor, offers the Allen-Bradley 1756-CN2R. We provide access to quality surplus automation components, ensuring you can maintain and upgrade your systems with reliable, cost-effective parts.

Module TypeBridge Module
NetworkControlNet
Ports2x BNC ControlNet, 1x RJ45 ControlNet, 1x USB 1.1
Speed5 Mbps
Max Nodes99
Backplane Current1300mA @ 5.1V DC, 3mA @ 24V DC
Operating Temperature0-60°C
Industrial Automation
ControlLogix Systems
SCADA Systems
HMI Integration
Distributed Control
Network Communication
ControlLogix Chassis (1756-A4, 1756-A7, etc.) ControlLogix Power Supplies (1756-PA72/C, 1756-PB72/C, etc.) ControlNet Network
AB 1756-CN2R Allen Bradley ControlNet ControlLogix Communication Card
Compatible with Allen-Bradley ControlLogix chassis and power supplies.
Expert tip
The module features redundant ControlNet ports, supporting linear or redundant ControlNet network topologies for enhanced system resilience.
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What is the primary function of the Allen-Bradley 1756-CN2R ControlNet module?
The Allen-Bradley 1756-CN2R is a ControlLogix communication module that provides redundant ControlNet connectivity. Its main function is to enable reliable and deterministic communication between ControlLogix controllers and other devices on a ControlNet network, supporting up to 99 nodes.