Allen-Bradley 1756-EN2T/C EtherNet/IP Bridge Module – ControlLogix Communication Series
When a ControlLogix backplane loses its EtherNet/IP gateway, the entire control architecture goes silent. PLCs cannot exchange I/O data with remote racks, SCADA systems lose visibility, and production lines halt — not because the controller failed, but because the communication bridge is missing. The Allen-Bradley 1756-EN2T/C is that bridge: a dedicated EtherNet/IP communication module that keeps every node on your network synchronized, deterministic, and online.
Within the ControlLogix 1756 platform — Rockwell Automation’s flagship modular control system trusted in thousands of critical manufacturing facilities worldwide — the EN2T/C revision represents a mature, field-proven iteration of the dual-port EtherNet/IP bridge. It supports Device Level Ring (DLR) topology natively, enabling media-redundant networks without external switches. In global industrial automation markets, the 1756-EN2T series is the de facto standard for high-availability EtherNet/IP backplane communication, deployed across automotive, oil & gas, food & beverage, and semiconductor manufacturing.
Technical Specifications
- Catalog Number: 1756-EN2T/C
- Series: ControlLogix 1756
- Communication Protocol: EtherNet/IP (CIP)
- Network Speed: 10/100 Mbps, auto-negotiating
- Ports: 2 × RJ-45 (dual-port, supports DLR)
- Topology Support: Linear, Star, Device Level Ring (DLR)
- Backplane Current Draw: 1A @ 5V DC (typical)
- Operating Temperature: 0 °C to 60 °C (32 °F to 140 °F)
- Storage Temperature: -40 °C to 85 °C
- Relative Humidity: 5% to 95% non-condensing
- Certifications: UL, CE, cUL, C-Tick
- Form Factor: Single-slot ControlLogix chassis module
- Weight: Approx. 200 g
- Firmware: Field-upgradeable via ControlFlash
Key Features & Benefits
- Dual-Port DLR Support: Eliminates single points of network failure; the ring self-heals in <3 ms on link loss, maintaining uninterrupted I/O communication.
- High Connection Capacity: Supports up to 256 CIP connections simultaneously, accommodating large distributed I/O networks and peer-to-peer messaging.
- Integrated Web Server: Built-in diagnostics page accessible via standard browser — no additional software required for network health monitoring.
- Produced/Consumed Tags: Native support for multicast produced/consumed tags across ControlLogix chassis, enabling efficient peer data exchange.
- ControlNet Bridge Compatibility: Can bridge EtherNet/IP to ControlNet segments when paired with 1756-CN2 modules in the same chassis.
- Hot-Swap Capable: Module can be inserted and removed under power without disrupting other modules in the chassis.
- RSLinx & Studio 5000 Integration: Fully supported by Rockwell’s engineering toolchain for seamless configuration and diagnostics.
Industry & Equipment Applications
- Automotive Manufacturing: Body-in-white welding lines, paint shop conveyors, and assembly robot cells requiring deterministic EtherNet/IP I/O.
- Oil & Gas: Wellhead control panels, pipeline SCADA integration, and offshore platform safety instrumented systems (SIS).
- Food & Beverage: Hygienic packaging lines, CIP (clean-in-place) systems, and batch processing with remote I/O over EtherNet/IP.
- Semiconductor & Electronics: Cleanroom equipment networks where media redundancy and low-latency communication are mandatory.
- Water & Wastewater: Distributed pump station control with SCADA connectivity via EtherNet/IP to supervisory systems.
- Mining & Minerals: Conveyor drive networks, crusher control systems, and remote substation automation.
System Integration & Compatible Parts
The 1756-EN2T/C is designed to operate within the ControlLogix 1756 ecosystem. Commonly integrated with:
- 1756-L7x / L8x Controllers: ControlLogix 5570 / 5580 CPUs sharing the same chassis backplane.
- 1756-PA72 / PB72: ControlLogix power supplies providing backplane power.
- 1756-A7 / A10 / A13 / A17: ControlLogix chassis (7, 10, 13, or 17 slots).
- 1734-AENTR: POINT I/O EtherNet/IP adapter as remote I/O target on the same DLR ring.
- 1769-L3x CompactLogix: Peer controllers communicating via produced/consumed tags over EtherNet/IP.
- Stratix 5700 / 5400 Managed Switches: Rockwell-branded Cisco switches for star topology deployments.
Our Quality Assurance Process
At Konmask.com, every 1756-EN2T/C unit undergoes a structured verification process before shipment:
- Authenticity Verification: Visual inspection of catalog label, revision marking (/C), and Rockwell Automation holographic security features.
- Functional Power-On Test: Module is powered in a live ControlLogix chassis; LED status indicators (OK, NET, LNK) are confirmed operational.
- Firmware Version Check: Firmware revision is documented and disclosed to the buyer prior to shipment.
- ESD-Safe Packaging: Shipped in anti-static bags with foam cushioning inside double-wall corrugated cartons.
- Documentation Included: Packing list with serial number, test record, and optional Certificate of Conformance (CoC) on request.
How to Order
- Submit your inquiry via the Contact / Request a Quote form on this page.
- Provide your required quantity, delivery timeline, and destination country.
- Our team responds within 1 business day with availability, lead time, and a formal quotation.
- Upon PO confirmation, we arrange export documentation, ESD packaging, and your preferred freight method (DHL / FedEx / sea freight).
- Tracking number and commercial invoice are issued upon dispatch.
📧 [email protected] | 📞 +0086 19859288691
Why Choose Konmask.com?
- ✅ Specialized in Industrial Automation: We focus exclusively on PLC, DCS, and automation hardware — not a general electronics marketplace.
- ✅ Global Export Experience: Serving buyers in Southeast Asia, Middle East, Europe, and the Americas with compliant export documentation.
- ✅ Transparent Sourcing: Firmware version, physical condition (new / refurbished / surplus), and test records disclosed upfront.
- ✅ Responsive Technical Support: Our team includes engineers familiar with Rockwell Automation architecture — we answer technical questions, not just sales queries.
- ✅ Flexible MOQ: Single-unit orders accepted; volume pricing available for project quantities.
Frequently Asked Questions
Q: What is the difference between 1756-EN2T and 1756-EN2T/C?
A: The “/C” denotes the hardware revision. Revision C introduced improved EMC performance and updated firmware compatibility. Functionally, it supports the same EtherNet/IP feature set as earlier revisions but is recommended for new installations due to its extended support lifecycle.
Q: Can the 1756-EN2T/C be used in a GuardLogix safety system?
A: Yes. The 1756-EN2T/C can reside in the same chassis as a GuardLogix 1756-L7xS controller and carry both standard and safety CIP connections over EtherNet/IP, subject to your safety network configuration.
Q: Does this module support EtherNet/IP Device Level Ring (DLR)?
A: Yes. The dual RJ-45 ports support DLR ring topology natively. When a cable break occurs, the ring supervisor reconfigures the network in under 3 milliseconds, maintaining I/O communication without controller fault.
Q: What Studio 5000 / RSLogix 5000 version is required?
A: The 1756-EN2T/C is supported from RSLogix 5000 v16 onwards. For DLR configuration, Studio 5000 v21 or later is recommended. Always verify compatibility with your specific controller firmware revision.
Q: Do you provide export documentation for international orders?
A: Yes. We provide a commercial invoice, packing list, and can arrange a Certificate of Origin. For regulated destinations, please contact us in advance to discuss compliance requirements.
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Contact: [email protected] | +0086 19859288691
