ControlLogix® ControlNet Interface

Distinctive CIP Services
Product Category
Communications Bridges and Gateways
Device Profile
Communications Adapter: 0x0C

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The ControlLogix ControlNet interface allows bridging and routing among all of Rockwell Automation's NetLinx networks (EtherNet/IP, ControlNet, and DeviceNet) as well as established networks such as Data Highway Plus™. Seamless bridging and routing of the NetLinx networks eliminates the need for routing tables or additional controller programming.

The 1756-CNB(R) and 1756-CN2(R) ControlNet Bridge Modules provides the ControlLogix platform with ControlNet connectivity. When used in a ControlLogix Gateway system, the modules can bridge messages between ControlNet or any other networks without a ControlLogix processor. When used in conjunction with a ControlLogix processor, these modules can control I/O or perform peer-to-peer interlocking for high-performance transfer of critical data.

The 1756-CN2(R) with USB Network Access Port is designed for larger or more demanding applications that require a faster I/O response. The 1756-CNB(R) with Network Access Port is recommended for smaller systems, those using ControlLogix Redundancy and as communication modules for remote I/O.

Features Include:

  • Diagnostic display
  • Direct bridging between ControlNet and other NetLinx networks
  • Optional media redundancy (dual BNC) available (1756-CNBR & 1756-CN2R)
  • Module powered directly from the ControlLogix backplane
  • Compatible with Rockwell Software RSNetWorx™ for ControlNet
  • Supports ControlNet peer-to-peer, scheduled, and unscheduled messaging
  • UL/CSA/CE/UR/FM/C-tick certified

Catalog Numbers:
  • 1756-CNB 
  • 1756-CNBR
  • 1756-CN2 
  • 1756-CN2R  

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An ODVA Declaration of Conformity has been issued for the product(s) described on this page.

This Declaration confirms that the product(s) passed conformance and related testing at an ODVA vendor-independent Test Service Provider.

Doc icon   Download the Declaration of Conformity

DOC Number: 10363 Year: 2014

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ControlNet Product Class
ControlNet Configuration
Redundant Configuration Available

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EtherNet/IP ID: 1
DeviceNet ID: 1
ControlNet ID: 1