Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Model | 1756-EN2TR |
| Product Type | EtherNet/IP Communication Module |
| Platform | ControlLogix (1756) |
| Ports | 2 × RJ45 copper (embedded switch) |
| Communication Rate | 10/100 Mbps |
| Topology Support | Device Level Ring (DLR), Linear |
| TCP Connections | Up to 128 |
| CIP / Logix Connections | Up to 256 |
| CIP Motion Axes | Up to 8 |
| Current Draw @ 5.1 V DC | Approx. 1 A |
| Power Dissipation | Approx. 5.1 W |
| Slot Width | 1 |
4. Product Introduction (Anti-Template)
The Allen-Bradley 1756-EN2TR is a dual-port EtherNet/IP communication module for the ControlLogix platform. It features two copper RJ45 ports with embedded switch technology, enabling Device Level Ring (DLR) and linear network topologies without the need for an external switch in many applications.
The module supports up to 128 TCP connections and 256 CIP connections, and can handle up to 8 CIP Motion axes. It installs in any slot of a standard 1756 ControlLogix chassis and draws approximately 1 A from the 5.1 V backplane supply. The 1756-EN2TR is commonly used as a bridge between the ControlLogix controller and EtherNet/IP devices, remote I/O, and higher-level networks. Exact firmware revision and series letter should be verified for compatibility with the existing controller and network configuration.
1756-EN2TR
1756-EN2TR
1756-EN2TR
1756-EN2TR
5. QC, Procurement & Logistics SOP
- Inbound Verification – Confirm full catalog number (1756-EN2TR), series/firmware labels, and RJ45 port condition. Photograph all labels.
- Functional Testing – Install in a compatible ControlLogix chassis and verify module status, network link LEDs, and basic communication. Full validation requires the RSLogix / Studio 5000 project.
- QA & Packaging – Protect the backplane connector and Ethernet ports, clean according to electronics handling practices, and pack in anti-static protective packaging.
- Global Logistics & Export Compliance – Classify under the correct HS code for industrial communication modules. Packaging must protect connectors; export documentation is prepared to minimize customs delays.
6. Technical Pitfalls & Integration Warnings
Firmware Compatibility – Confirm that the module firmware is compatible with the ControlLogix controller firmware and Studio 5000 version in use.
DLR Configuration – When using Device Level Ring, ensure proper ring supervisor configuration and media redundancy settings.
Connection Limits – Do not exceed the supported number of TCP and CIP connections; overloading the module can cause communication faults.
Series Differences – Later series (e.g., /C) may have enhanced capabilities. Verify the exact series required by the application.
7. Frequently Asked Questions (FAQ)
What is the realistic global lead time for a verified 1756-EN2TR?
As a current ControlLogix communication module, availability is generally good. Typical lead time after verification is a few days to 2 weeks depending on stock and series.
What is the primary function of this module?
It is a dual-port EtherNet/IP bridge module with embedded switch for ControlLogix systems.
What network topologies does it support?
Device Level Ring (DLR) and linear topologies.
How many TCP connections does it support?
Up to 128 TCP connections.
Does it support CIP Motion?
Yes, up to 8 CIP Motion axes.
Is the 1756-EN2TR still in production?
Yes. It remains an active product in the ControlLogix communication module portfolio.
What should be confirmed before ordering a replacement?
Exact catalog number and series (1756-), firmware compatibility with the controller, and the required network topology (DLR or linear).
