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- Allen Bradley
- 1756-CN2
- ControlLogix ControlNet Communication Module
- USA
- 14 × 11 × 5 cm
- 0.26kg
- Xiamen, China
- New & In Stock
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1756-CN2 ControlLogix ControlNet Communication Module – Detailed Technical Overview
Product Overview
The 1756-CN2 is a ControlNet communication module used in ControlLogix PLC systems for high-speed deterministic industrial networking.
It enables real-time data exchange between controllers, I/O modules, and distributed automation devices over a ControlNet network.
This module is designed for industrial environments requiring synchronized control, stable communication, and deterministic network performance.
It is commonly used in manufacturing automation, process industries, energy systems, and large-scale distributed control architectures.
The 1756-CN2 is part of the ControlLogix modular communication family and supports integration into multi-controller and multi-chassis systems.
Brand Information
| Item | Details |
|---|---|
| Brand | Industrial automation Control platform |
| Product Model | 1756-CN2 |
| Product Type | ControlNet Communication Module |
| Product Family | ControlLogix 1756 Series |
| Series | ControlLogix Communication Modules |
| Function | Network communication bridge |
| Network Type | ControlNet |
Product Series Introduction
The ControlLogix platform is a modular PLC system designed for scalable industrial automation applications.
Within this architecture, communication modules like the 1756-CN2 provide deterministic networking capabilities for real-time industrial control.
ControlNet is a high-speed, scheduled industrial network designed for precise synchronization between controllers and I/O devices.
The 1756-CN2 acts as a communication interface, enabling integration between ControlLogix controllers and ControlNet networks.
Detailed Technical Specifications of 1756-CN2
| Parameter | Specification |
|---|---|
| Model | 1756-CN2 |
| Product Type | ControlNet Communication Module |
| Network Protocol | ControlNet (CIP-based) |
| Transmission Speed | 5 Mbps |
| Maximum Nodes | 99 nodes |
| Logix Connections | Up to 128 connections |
| Communication Ports | 1 × ControlNet BNC |
| Backplane Interface | ControlLogix chassis backplane |
| Supported Topology | Redundant / Non-redundant (variant dependent) |
| Power Consumption | ~5.6 W |
| Current Draw @ 5.1V DC | ~1100 mA |
| Current Draw @ 24V DC | ~3 mA |
| Isolation Voltage | 30V continuous (network to backplane) |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Vibration Resistance | Up to 2 g |
| Shock Resistance | 30 g operating / 50 g non-operating |
| EMC Protection | Industrial EMC compliant |
| Dimensions | ~14 × 11 × 5 cm |
| Weight (kg) | ~0.26 kg |
Product Features
1. Deterministic Network Communication
Provides scheduled, real-time data exchange suitable for synchronized industrial control systems.
2. High-Speed Data Transfer
Supports 5 Mbps ControlNet communication for stable industrial networking.
3. Multi-Node Capability
Supports up to 99 nodes in a single ControlNet network segment.
4. Reliable Industrial Design
Built for vibration, shock, and harsh industrial environments.
5. Seamless ControlLogix Integration
Directly integrates into ControlLogix chassis systems for plug-and-play communication.
Product Applications
Distributed Industrial Automation
Used in multi-controller systems requiring synchronized communication.
Manufacturing Production Lines
Supports coordinated machine control across production systems.
Process Control Systems
Used in chemical, oil & gas, and water treatment facilities.
Energy and Utility Systems
Enables reliable communication in power generation and distribution systems.
Motion Control Systems
Used in coordinated multi-axis industrial automation systems.
Product Advantages
| Advantage | Description |
|---|---|
| Deterministic Communication | Ensures real-time data synchronization |
| High Network Stability | Reliable industrial-grade communication |
| Multi-Node Support | Up to 99 connected devices |
| Low Latency | Fast response for control applications |
| Industrial Durability | Resistant to vibration and shock |
| Easy Integration | Plug-in ControlLogix module design |
| Redundancy Support | Supports system redundancy configurations |
| Proven Industrial Protocol | Widely used ControlNet standard |
Recommended Models from Same Series or Related Series
| Model | Product Type | Main Function | Network Type | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1756-CN2 | ControlNet Module | Standard communication module | ControlNet | 14 × 11 × 5 cm | 0.26 kg |
| 1756-CN2R | Redundant ControlNet Module | Redundant networking | ControlNet | 14 × 11 × 5 cm | 0.29 kg |
| 1756-CNB | ControlNet Bridge | Basic communication bridge | ControlNet | 14 × 11 × 5 cm | 0.26 kg |
| 1756-CNBR | Redundant Bridge Module | Dual-channel redundancy | ControlNet | 14 × 11 × 5 cm | 0.29 kg |
| 1756-EN2TR | Ethernet Module | Industrial Ethernet communication | EtherNet/IP | 14 × 11 × 8 cm | 0.45 kg |
Recommended Popular Models from Same Brand
| Model | Product Category | Main Features | Application Area | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1756-L71 | CPU Module | High-performance controller | Industrial automation | 20 × 15 × 10 cm | 0.90 kg |
| 1756-L73 | CPU Module | Advanced processing CPU | Distributed control systems | 20 × 15 × 10 cm | 0.95 kg |
| 1756-EN2TR | Ethernet Module | Dual-port communication | Industrial networking | 14 × 11 × 8 cm | 0.45 kg |
| 1756-IF8 | Analog Input Module | 8-channel input module | Process control | 15 × 12 × 5 cm | 0.35 kg |
| 1756-OB16E | Digital Output Module | 16-point output module | Machine automation | 15 × 12 × 5 cm | 0.40 kg |
System Role in Industrial Automation
The 1756-CN2 serves as a critical communication interface in ControlLogix systems, enabling deterministic industrial networking.
It ensures synchronized data transfer between controllers and distributed devices, improving system coordination and control accuracy.
It is widely used in large-scale automation architectures requiring stable real-time communication.
Installation and Maintenance Characteristics
The module is installed directly into a ControlLogix chassis slot without external wiring complexity.
Configuration is performed through system software during network setup.
Maintenance is minimal, typically limited to replacement in case of hardware failure.
Proper network configuration ensures optimal performance and reliability.
Industrial Reliability
The 1756-CN2 is designed for continuous operation in harsh industrial environments.
It provides stable communication performance under electrical noise, vibration, and temperature variation conditions.
Its robustness makes it suitable for mission-critical industrial control systems.
Summary
The Allen Bradley 1756-CN2 is a ControlNet communication module designed for deterministic industrial networking in ControlLogix systems.
It enables high-speed, reliable, and synchronized communication between controllers and industrial devices.
Its stability, scalability, and industrial-grade performance make it a key component in distributed automation systems.