Allen-Bradley 1756-EN2T – ControlLogix EtherNet/IP Communication Module

1. Product Title

Allen-Bradley 1756-EN2T – ControlLogix EtherNet/IP Communication Module

2. Product Overview

The 1756-EN2Tis a high-performance EtherNet/IP communication module from Allen-Bradley (Rockwell Automation), designed for the ControlLogix platform. This module enables seamless integration of controllers, I/O devices, HMIs, and other industrial equipment over standard Ethernet networks.

Engineered for real-time industrial communication, the 1756-EN2T provides high-speed data exchange and supports large-scale automation systems requiring reliable network connectivity. It acts as a bridge between the ControlLogix backplane and Ethernet-based networks, facilitating deterministic communication and remote access. Widely used in distributed control architectures, this module enhances system flexibility, scalability, and diagnostics capabilities.

3. Technical Specifications

• Brand: Allen-Bradley (Rockwell Automation)
• Model: 1756-EN2T
• Warranty: One Year
• Condition: 100% New & Original

Detailed Specifications:

• Product Type: EtherNet/IP Communication Module
• Communication Protocol: EtherNet/IP (CIP-based industrial protocol)
• Ethernet Ports: 1 × RJ45 (10/100 Mbps)
• Backplane Interface: ControlLogix high-speed backplane
• Connections Supported: Up to 128 CIP connections (typical)
• Messaging: Supports explicit and implicit messaging
• Network Topology: Star, linear, and Device Level Ring (DLR with external support)
• Power Consumption: Approx. 5.1 W
• Current Draw:
  • 5V DC: ~1 A
  • 24V DC: ~3 mA
• Operating Temperature: 0°C to +60°C
• Storage Temperature: -40°C to +85°C
• Humidity: 5–95% non-condensing
• Isolation Voltage: 30 V continuous (basic insulation)
• Dimensions: Standard 1756 module form factor
• Weight: Approx. 0.3 kg
• Certifications: CE, UL, CSA, FM

4. Key Features & Benefits

• High-Speed EtherNet/IP Connectivity:
  Enables real-time communication between controllers and distributed I/O, improving system responsiveness.
• Large Connection Capacity:
  Supports up to 128 connections, making it suitable for medium to large-scale automation systems.
• Seamless ControlLogix Integration:
  Directly interfaces with the ControlLogix backplane, ensuring efficient data transfer within the chassis.
• Flexible Network Architecture:
  Supports multiple topologies, allowing scalable and adaptable network design.
• Enhanced Diagnostics & Monitoring:
  Provides network status, fault diagnostics, and performance monitoring for improved maintenance and troubleshooting.

5. Application Scenarios

• Distributed Control Systems (DCS):
  Connects multiple controllers and remote I/O stations across plant-wide Ethernet networks.
• Manufacturing Automation:
  Enables communication between PLCs, HMIs, and industrial devices in assembly lines and robotic systems.
• Power & Utilities:
  Facilitates data exchange between control systems and SCADA platforms for monitoring and control.

6. Frequently Asked Questions (FAQ)

Q: What is the primary function of the 1756-EN2T?
A: It provides EtherNet/IP communication, allowing ControlLogix systems to connect and exchange data with Ethernet-based industrial devices.

Q: Is 1756-EN2T compatible with legacy systems?
A: Yes, it is compatible with ControlLogix platforms and supports integration with existing EtherNet/IP networks, provided configuration and firmware requirements are met.