1756-CN2 ControlLogix Allen-Bradley ControlNet Communication Module

Product Description

The Allen-Bradley 1756-CN2, also cataloged as the 1756-CN2 ControlLogix ControlNet Communication Module, provides direct network communication execution between ControlLogix controllers and ControlNet devices through standard media connections.

Hardware Specifications

Industrial Control Network Communication Features

The 1756-CN2 operates as a ControlNet interface module within the ControlLogix platform. It transfers scheduled and unscheduled data between Logix processors, remote I/O adapters, and other ControlNet nodes.

The module supports a 5 Mbps ControlNet network rate and manages up to 128 Logix connections. Therefore, it enables high-density communication configurations across distributed industrial control architectures.

The module uses ControlLogix backplane bus communication to exchange data with the controller chassis. Additionally, the ControlNet interface maintains deterministic communication timing for industrial automation networks.

Allen-Bradley ControlLogix modules use firmware flash compatibility mechanisms to maintain configuration consistency between hardware revisions and controller environments. The 1756-CN2 supports integration within ControlLogix chassis designs requiring ControlNet connectivity.

Frequently Asked Questions

Q: What network protocol does the 1756-CN2 support?
A: The 1756-CN2 supports the ControlNet communication protocol with a network speed of 5 Mbps.

Q: How many nodes can the 1756-CN2 ControlNet module support?
A: The module supports up to 99 ControlNet nodes within the network architecture.

Q: Can the 1756-CN2 communicate with Logix controllers through the chassis backplane?
A: Yes. The module communicates with ControlLogix controllers through the internal backplane bus connection.

Field Installation Guidelines

Install the 1756-CN2 module in an appropriate ControlLogix chassis slot and verify the backplane connection before applying power.

Use approved ControlNet cabling and maintain proper cable routing practices. Keep communication cables separated from high-voltage power conductors to reduce electrical interference.

Connect the ControlNet shield according to the system grounding design. Avoid unnecessary cable splices because they can increase signal attenuation and communication errors.

Before commissioning, verify node addressing, network configuration parameters, and controller communication settings through the ControlLogix programming environment.

Other Attributes

• Series: Allen-Bradley ControlLogix
• Country of Origin:  USA
• Lead Time: In Stock, 2 Working Days

In Stock Hot Items of Allen Bradley

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