The Allen-Bradley 1756-CN2 is a high-performance ControlNet communication module designed for the ControlLogix platform. This module enables seamless integration within industrial control systems, facilitating reliable, deterministic data exchange between controllers, I/O devices, and other networked components. It is engineered to support standard media and provides robust communication capabilities for demanding automation environments.
Features
Supports ControlNet network communication at 5 Mbps.
Capable of managing up to 128 Logix connections.
Scalable network support for up to 99 nodes.
Designed specifically for the Allen-Bradley ControlLogix series architecture.
Standard media compatibility for flexible network deployment.
Technical Specifications
Model
1756-CN2
Communication Type
ControlNet
Data Rate
5 Mbps
Max Logix Connections
128
Max Nodes
99
Manufacturer
Allen-Bradley
Weight
0.25 kg
Installation Guidelines
Ensure the ControlLogix chassis is powered down before inserting or removing the communication module to prevent electrical damage or system faults.
Align the module carefully with the chassis slot guides; slide it in until the backplane connector is fully seated.
Tighten the top and bottom retaining screws to ensure secure mounting and proper grounding to the chassis.
Use appropriate ControlNet media and connectors; ensure cables are routed away from high-voltage lines or sources of electromagnetic interference (EMI) to maintain signal integrity.
Verify that the network is properly terminated at both ends of the trunk line to prevent signal reflections.
FAQ
What is the primary function of the 1756-CN2? The 1756-CN2 acts as a bridge between the ControlLogix controller and the ControlNet network, allowing for high-speed, deterministic I/O and peer-to-peer communication.
How many nodes can this module support? This module supports a maximum of 99 nodes on a single ControlNet network segment.
Is this module compatible with standard ControlNet media? Yes, the 1756-CN2 is designed for use with standard ControlNet media, ensuring compatibility with standard cabling infrastructure.
