Product Overview

The Allen-Bradley 1756-EN2T is a high-performance EtherNet/IP™ communication bridge designed for the ControlLogix® 1756 platform. This module acts as a critical gateway, facilitating high-speed data exchange between the controller backplane and industrial Ethernet networks. It is engineered to support a wide array of automation tasks, ranging from simple I/O messaging to complex integrated motion control and safety data transmission.

By utilizing the Common Industrial Protocol (CIP™), the 1756-EN2T allows for seamless integration with Human Machine Interfaces (HMI), SCADA systems, and other Logix controllers. It is a cornerstone for modernizing industrial facilities, providing the bandwidth and connectivity required for Industrial Internet of Things (IIoT) implementations and smart manufacturing architectures.

Advanced Networking and Motion Capabilities

The 1756-EN2T offers significant performance upgrades over standard bridge modules, specifically in its ability to handle concurrent connection types and high-speed motion synchronization.

• High Connection Capacity: Supports up to 128 TCP/IP connections and 256 Logix-based CIP connections, ensuring robust communication in dense network environments.

• Integrated Motion on EtherNet/IP: Capable of supporting up to 8 axes of coordinated motion, eliminating the need for dedicated motion hardware in many applications.

• CIP Safety Support: Enables the simultaneous transfer of safety and standard control data over the same wire, simplifying wiring and reducing hardware costs in safety-critical systems.

• Deterministic Communication: Provides the low-latency, repeatable data delivery necessary for real-time control of distributed I/O and drive systems.

Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model Number: 1756-EN2T

• Module Type: EtherNet/IP Communication Bridge

• Communication Speed: 10/100 Mbps (Full or Half Duplex)

• Port Type: Single RJ45 Ethernet Port

• Backplane Current Draw: 1A @ 5.1V DC; 3mA @ 24V DC

• Power Dissipation: 5.1 Watts

• Thermal Dissipation: 17.4 BTU/hr

• Maximum Nodes: Supports up to 256 nodes

• Operating Temperature: 0°C to 60°C (32°F to 140°F)

• Isolation Voltage: 30V (Continuous), Basic Insulation Type

• Weight: 0.20 kg (0.44 lbs)

• Diementions: 3.5x14x14.5cm

Reliability and System Integration

• Flexible Topologies: Supports linear network structures and can be integrated into Device Level Ring (DLR) topologies when used in conjunction with a DLR-capable switch or additional modules.

• Secure Operations: Features "Protected Mode" to prevent unauthorized firmware changes or configuration modifications, enhancing the cybersecurity posture of the control system.

• Electronic Keying: Helps prevent system errors by ensuring the correct module version and revision are present in the chassis before the controller goes into Run mode.

• Chassis Versatility: Compatible with all standard 1756 ControlLogix chassis (4, 7, 10, 13, and 17-slot) and works with both standard and redundant power supply configurations.