The Allen-Bradley 1756-EN2T is a high-performance EtherNet/IP communication interface module designed for the ControlLogix automation platform. It acts as a bridge between the ControlLogix backplane and standard industrial Ethernet networks, facilitating seamless data exchange between controllers, distributed I/O, HMIs, and other EtherNet/IP-enabled devices.

Features

• Supports 10/100 Mbps Ethernet communication rates.
• Provides 256 Logix (CIP) connections and 128 TCP/IP connections.
• Enables real-time I/O messaging, controller-to-controller communication, and remote programming.
• Supports up to 8 axes for integrated motion on EtherNet/IP networks.
• Features one RJ45 Ethernet port and one USB 1.1 port for configuration.
• Supports electronic keying and Device Level Ring (DLR) network topologies.

Applications

• Distributed Process Racks: Bridging hazardous field I/O to central control systems.
• Flow Meter and Custody Transfer: Integrating TCP/Modbus data from field gauges.
• Emergency Shutdown Systems (ESD): Reliable signal transmission for pipeline control.
• Batch and Recipe Management: Connecting controllers to FactoryTalk Batch servers.
• High-Speed Packaging: Facilitating rapid communication for sensors and actuators.

Technical Specifications

Installation Guidelines

• The module can be installed in any slot of a ControlLogix chassis.
• Align the module circuit board with the top and bottom guide rails of the chassis slot.
• Slide the module firmly until the retaining tabs click, ensuring it is flush with adjacent modules.
• The 1756-EN2T supports Removal and Insertion Under Power (RIUP), allowing installation or removal while the backplane is energized.
• Use Category 5 unshielded twisted-pair cabling for Ethernet connections.
• Ensure proper IP address, subnet mask, and gateway parameters are configured via software before network operation.

FAQ

What is the primary function of the 1756-EN2T?

It serves as a communication bridge that allows ControlLogix controllers to exchange data over EtherNet/IP networks, supporting both explicit and implicit messaging.

Can this module be used for motion control?

Yes, it supports up to 8 axes for integrated motion applications over the EtherNet/IP network.

Does this module require a specific slot in the chassis?

No, the 1756-EN2T can be installed in any available slot within a standard ControlLogix chassis.