Allen-Bradley 1756-EN2TR ControlLogix Dual-Port EtherNet/IP Communication Module

Allen-Bradley 1756-EN2TR ControlLogix Dual-Port EtherNet/IP Communication Module

Part #: 1756-EN2TR Manufactured by: Allen-Bradley

Regular price: $1,142.00
Sale price: $1,142.00
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Condition: New – Open box

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Product Overview

The Allen-Bradley 1756-EN2TR ControlLogix Ethernet module provides robust communication with dual-port redundancy, high co... Read more

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Product Description P/N: 1756-EN2TR

Description / Specifications

Description

The Allen-Bradley 1756-EN2TR is a ControlLogix Ethernet communication module with dual RJ45 ports for redundant Ethernet/IP networking. It supports 10/100 Mbps transmission speeds and includes a USB 1.1 port for configuration and diagnostics.

Technical Specifications

Condition	New/Never Used Surplus
Brand	Allen-Bradley
Category	PLCs / Machine Control
Part Number	1756-EN2TR
Subcategory	PLC Communication Module
Manufacturer	Rockwell Automation
Series	ControlLogix
Module Type	EtherNet/IP Communication Module
Communication Protocol	EtherNet/IP
Ethernet Communication Rate	10/100 Mbps
Integrated Ports	2 × RJ45 Ethernet, 1 × USB 1.1
Network Redundancy	Device Level Ring (DLR), Parallel Redundancy Protocol (PRP)
Maximum Logix Connections	256
Maximum TCP/IP Connections	128
Integrated Motion Support	Up to 8 Axes over EtherNet/IP
Backplane Current @ 5 VDC	1.0 A
Backplane Current @ 24 VDC	3 mA
Power Consumption	5.1 W
Power Dissipation	5.1 W
Thermal Dissipation	21.28 BTU/hr
Insulation Voltage	30 V Continuous
Slot Width	1 Slot
Installation Location	Any Slot in ControlLogix Chassis
Enclosure Type	Open Style
Operating Temperature	0°C to 60°C (32°F to 140°F)
Weight	Approximately 0.30 kg (0.66 lb)

Information About 1756-EN2TR

The 1756-EN2TR is part of the ControlLogix communication module series, designed to provide high-speed Ethernet/IP connectivity with redundancy for enhanced network reliability. It supports real-time I/O messaging, controller-to-controller communication, safety data transfer, and integrated motion with up to 8 axes on Ethernet/IP. This module operates at 10/100 Mbps with auto-negotiation and supports up to 256 Logix connections and 128 TCP/IP connections, enabling scalable integration in complex automation systems. It consumes 1 A at 5 VDC from the chassis backplane with a power dissipation of 5.1 W and thermal dissipation of 21.28 BTU/hr. Featuring Device Level Ring (DLR) and Parallel Redundancy Protocol (PRP) support, the 1756-EN2TR improves network resiliency while maintaining seamless communication. Its open-style design, single-slot width, and compatibility with any slot in the ControlLogix chassis provide flexible installation in industrial environments.

Key Features:

Ethernet Ports: Dual RJ45 ports supporting redundant Ethernet/IP networks at 10/100 Mbps.
USB Interface: Integrated USB 1.1 port for programming, configuration, and diagnostics.
Network Support: Handles 256 Logix connections, 128 TCP/IP connections, and up to 8 motion axes on Ethernet/IP.
Performance: Provides real-time I/O messaging, controller-to-controller communication, and CIP safety data transfer.
Redundancy: Supports Device Level Ring (DLR) and Parallel Redundancy Protocol (PRP) for network resiliency.
Power Requirements: Draws 1 A at 5 VDC and 3 mA at 24 VDC with 5.1 W maximum power dissipation.
Thermal Rating: 21.28 BTU/hr thermal dissipation for efficient heat management.
Insulation: Rated for 30 V continuous insulation voltage for electrical safety.
Installation: Open-style, single-slot module that can be placed in any ControlLogix chassis slot.
Application Use: Enables messaging, distributed I/O, safety, and motion control over Ethernet/IP.

The 1756-EN2TR delivers the reliability and precision required for redundant Ethernet communication in ControlLogix automation systems.

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Frequently Asked Questions about 1756-EN2TR

Question: What is the 1756-EN2TR module?

Date Update:29/05/2025

Answer:

The 1756-EN2TR is an Ethernet/IP communication module for the ControlLogix system by Rockwell Automation. It is used to connect a ControlLogix PLC to an Ethernet network, allowing for high-speed, real-time communication between the PLC and other devices such as HMIs, remote I/O, and other networked devices.

Question: What is the weight of the 1756-EN2TR?

Date Update:29/05/2025

Answer:

The 1756-EN2TR module weighs approximately 0.5 kg (1.1 lbs). This makes it relatively lightweight and easy to install in a ControlLogix rack.

Question: What is the purpose of the dual Ethernet ports on the 1756-EN2TR?

Date Update:29/05/2025

Answer:

The dual Ethernet ports on the 1756-EN2TR module support network redundancy and cable fault tolerance. Using a feature known as Device-Level Ring (DLR), these ports can form a redundant ring network, ensuring that communication can still take place if one network path fails. This is crucial for applications where uptime and reliability are critical.

Question: What is the maximum number of devices that can be connected to the 1756-EN2TR module?

Date Update:29/05/2025

Answer:

The 1756-EN2TR module itself does not have a strict limit on the number of devices that can be connected to it, as this is primarily determined by the Ethernet network infrastructure and the network load. However, when used in Ethernet/IP networks, it can handle multiple devices depending on the available bandwidth, network configuration, and communication load. The network should be designed to handle the traffic of all connected devices.

Question: Where can I find the user manual for the 1756-EN2TR?

Date Update:29/05/2025

Answer:

The user manual and product documentation for the 1756-EN2TR module can be found on the Rockwell Automation website under the product support section. You can also access the manual from within the software environment, such as Studio 5000 or RSLogix 5000, by navigating to the help section. The manual includes detailed information on installation, configuration, and troubleshooting.

IQElectro is not an authorized distributor.

IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.

Description / Specifications