1756-EN2T | Allen‑Bradley ControlLogix EtherNet/IP Communication Module

Product Overview

The Allen-Bradley 1756-EN2TR is a ControlLogix EtherNet/IP communication module designed for high-availability industrial automation systems. It provides dual copper Ethernet ports, embedded switching, and Device Level Ring (DLR) redundancy to help maintain continuous communication in demanding production environments.

This module supports real-time I/O messaging, explicit messaging, motion control, safety communication, and device-level diagnostics over standard EtherNet/IP networks. It is commonly used in manufacturing, process control, material handling, packaging, automotive, food and beverage, and other automation applications that require reliable Ethernet communication.

Key Features

• Dual-port EtherNet/IP communication with 10/100 Mbps auto-negotiation
• DLR device-level ring redundancy for fast network recovery
• 256 CIP connections and 128 TCP/IP connections
• Supports CIP Motion, CIP Safety, and CIP Sync
• Embedded Ethernet switch for linear or ring network topologies
• USB port for local configuration and diagnostics
• Hot-swappable in a ControlLogix chassis
• Compatible with standard ControlLogix racks in any slot

Technical Specifications

Specification	Detail

Specification	Detail
Brand	Allen-Bradley / Rockwell Automation
Series	ControlLogix
Part Number	1756-EN2TR
Module Type	EtherNet/IP Communication Module
Ethernet Ports	2 × RJ45 copper ports
Communication Speed	10/100 Mbps
Network Protocol	EtherNet/IP, TCP/IP
CIP Connections	Up to 256
TCP/IP Connections	Up to 128
Redundancy	DLR ring support
Motion Support	Up to 8 axes CIP Motion
Safety Support	CIP Safety
USB Port	1 × USB 1.1
Backplane Current	5.1V DC, 1.0 A
Power Dissipation	5.1 W
Installation	ControlLogix chassis, any slot
Operating Temperature	0 to 60 °C
Certifications	CE, cULus, ATEX, CCC

Specifications are based on manufacturer documentation and may vary by firmware revision and application.

Applications

The 1756-EN2TR is suitable for:

• Redundant EtherNet/IP networks requiring high availability
• Distributed I/O systems connected to ControlLogix controllers
• Motion control applications with servo drives and integrated motion
• Safety-enabled systems using CIP Safety devices
• Packaging, automotive, food and beverage, and process industries
• Machine-level and plant-level Ethernet communication

Why Choose the 1756-EN2TR

The 1756-EN2TR stands out because it combines dual Ethernet ports, DLR redundancy, and high connection capacity in a single ControlLogix communication module. It helps reduce the need for additional switches in simple ring or linear topologies while improving network reliability.

For engineers and procurement teams, it is a practical choice when upgrading existing ControlLogix systems, expanding EtherNet/IP networks, or replacing legacy communication modules with a more resilient solution.

Compatibility

The 1756-EN2TR installs into a ControlLogix chassis and communicates with ControlLogix controllers over the backplane. Configuration and programming are typically performed using Rockwell Automation software such as RSLogix 5000 / Studio 5000 Logix Designer and RSLinx Classic / FactoryTalk Linx, depending on software version requirements.

FAQ

What does 1756-EN2TR stand for?
1756 refers to the ControlLogix platform, EN indicates EtherNet/IP, 2 means dual ports, T indicates EtherNet/IP with motion support, and R indicates ring/DLR redundancy.

Does the 1756-EN2TR support redundancy?
Yes. It supports DLR device-level ring redundancy to help maintain communication if a network link fails.

How many connections does it support?
It supports up to 256 CIP connections and 128 TCP/IP connections.

Can it be used for motion control?
Yes. It supports up to 8 axes of integrated motion over EtherNet/IP.

Call to Action

Looking for the Allen-Bradley 1756-EN2TR? Contact us for product availability, lead time, pricing, and technical support. We can assist with module selection, compatibility checks, and industrial automation procurement.

1756-EN2TR

Our products are widely used in CNC mechanical metallurgy, petroleum and natural gas, and petrochemical industries,Chemical industry, paper and printing, textile printing and dyeing, machinery, electronic manufacturing, automobile manufacturing,Plastic machinery, electricity, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution.The quoted price is not the actual price. Please contact the shopkeeper before placing the order to confirm the price and delivery time!!!

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