High-Capacity EtherNet/IP Solution — Allen-Bradley 1756-EN2TK | ControlLogix Series
Where This Product Is Used
The Allen-Bradley 1756-EN2TK is a high-capacity EtherNet/IP communication module designed for the ControlLogix platform. It is deployed in demanding industrial environments where high-throughput, deterministic Ethernet communication is critical. Typical application sites include:
- Automotive Assembly Lines — coordinating robot cells, servo drives, and vision systems over a single EtherNet/IP backbone
- Oil & Gas Processing Plants — linking remote I/O racks, variable frequency drives (VFDs), and safety PLCs across large-scale distributed control architectures
- Water & Wastewater Treatment Facilities — integrating SCADA systems with field instrumentation and pump control panels
- Pharmaceutical Manufacturing — supporting validated batch control systems with high-speed data exchange between ControlLogix controllers and HMI/MES layers
- Food & Beverage Processing — managing conveyor systems, filling lines, and packaging machinery with real-time I/O updates
- Power Generation & Utilities — connecting substation automation equipment and energy management systems
- Mining & Metals — ruggedized network communication for crusher control, conveyor drives, and process monitoring in harsh environments
Technical Specifications
| Parameter | Specification |
|---|---|
| Catalog Number | 1756-EN2TK |
| Series | ControlLogix (CLX) |
| Communication Protocol | EtherNet/IP (CIP over Ethernet) |
| Network Speed | 10/100/1000 Mbps (Gigabit-capable) |
| Port Type | Twisted-Pair (TP) — RJ45 |
| Number of Ports | 2 × RJ45 (dual-port) |
| Topology Support | Linear, Ring (DLR), Star |
| Device Level Ring (DLR) | Supported (Ring Supervisor capable) |
| Max CIP Connections | 256 (high-capacity) |
| Backplane Current Draw | 980 mA @ 5V DC |
| Operating Temperature | 0 °C to 60 °C (32 °F to 140 °F) |
| Storage Temperature | -40 °C to 85 °C |
| Relative Humidity | 5–95% non-condensing |
| Chassis Compatibility | 1756 ControlLogix chassis (all sizes) |
| Weight | 360 g |
| Firmware Upgradeable | Yes (via ControlFLASH) |
Why Engineers Specify This Model
- High Connection Density: Supports up to 256 CIP connections — significantly more than standard EN2T variants — enabling large I/O trees and multi-device topologies without additional bridge modules.
- Dual-Port Flexibility: Two RJ45 ports allow linear daisy-chain or Device Level Ring (DLR) topologies, eliminating single points of failure in critical production networks.
- Gigabit Backbone Ready: 10/100/1000 Mbps auto-negotiation future-proofs installations against bandwidth-intensive applications such as motion control and vision integration.
- Seamless Studio 5000 Integration: Native Add-On Profile (AOP) support simplifies commissioning within Rockwell Automation’s Studio 5000 Logix Designer environment.
- Proven Field Reliability: Widely deployed across Fortune 500 manufacturing facilities with documented MTBF performance in 24/7 continuous operation.
Complete System Bill of Materials
A typical ControlLogix EtherNet/IP node using the 1756-EN2TK requires the following components:
| Item | Catalog Number | Description |
|---|---|---|
| Controller | 1756-L85E / 1756-L84E | ControlLogix 5580 CPU |
| EtherNet/IP Module | 1756-EN2TK | This module — Hi-Cap dual-port TP |
| Chassis | 1756-A7 / 1756-A13 | ControlLogix 7- or 13-slot chassis |
| Power Supply | 1756-PA75R / 1756-PB75R | AC or DC redundant power supply |
| Digital I/O | 1756-IB16 / 1756-OB16E | 16-pt 24V DC input / output modules |
| Analog I/O | 1756-IF8 / 1756-OF8 | 8-ch analog input / output modules |
| Remote I/O Adapter | 1734-AENTR | POINT I/O EtherNet/IP adapter (DLR) |
| Managed Switch | 1783-BMS10CGL | Stratix 5700 managed Ethernet switch |
Compliance & Industry Standards
- CE Marking — European Conformity (EMC Directive 2014/30/EU, LVD 2014/35/EU)
- UL Listed — UL 508 (Industrial Control Equipment)
- cUL Listed — Canadian Standards compliance
- RCM / C-Tick — Australia & New Zealand EMC compliance
- ODVA Conformance Tested — EtherNet/IP conformance certification by ODVA
- RoHS Compliant — Restriction of Hazardous Substances Directive 2011/65/EU
- IEC 61131-2 — Programmable controllers: equipment requirements and tests
- ATEX / IECEx — Suitable for use in Zone 2 hazardous locations when installed per Rockwell guidelines
Quality Assurance & Sourcing
Konmask.com specializes in industrial automation components for mission-critical applications. Every 1756-EN2TK unit offered through our platform is subject to the following quality controls:
- Traceability: Full supply-chain documentation available upon request, including distributor invoices and manufacturer certificates of conformance (CoC).
- Functional Verification: Modules are bench-tested for backplane communication, port link negotiation, and firmware version confirmation prior to dispatch.
- Packaging Integrity: Original Rockwell Automation anti-static packaging preserved where available; ESD-safe repackaging applied for surplus stock.
- Warranty: 12-month operational warranty against manufacturing defects. Replacement or full refund issued within warranty period.
- Counterfeit Prevention: All units inspected against Rockwell Automation’s published authenticity markers. Suspected non-genuine units are quarantined and not sold.
How to Source This Part
- Add to Cart — Select quantity and proceed to checkout directly on this page.
- Request a Quote — For orders of 3+ units, bulk pricing, or project-based procurement, contact us at support@konmask.com for a formal quotation within 24 hours.
- Lead Time — In-stock units ship within 1–3 business days. Ex-stock availability confirmed at time of order. For urgent requirements, expedited shipping options are available.
- Export & Cross-Border Orders — We support international procurement with commercial invoice, packing list, and HS code documentation (HS: 8537.10) for customs clearance.
- Payment Terms — T/T (bank transfer), PayPal, and trade credit available for approved accounts. Contact us to discuss NET terms for recurring procurement.
Application-Specific FAQ
Q: What is the difference between 1756-EN2T and 1756-EN2TK?
A: The 1756-EN2TK is the high-capacity variant supporting up to 256 CIP connections versus 128 on the standard 1756-EN2T. It is recommended for large systems with many I/O devices, drives, or HMI connections on a single module.
Q: Can the 1756-EN2TK act as a DLR Ring Supervisor?
A: Yes. The module supports Device Level Ring (DLR) topology and can be configured as a Ring Supervisor, providing automatic network fault recovery in under 3 ms.
Q: Is this module compatible with ControlLogix 5580 (L8x) controllers?
A: Yes. The 1756-EN2TK is fully compatible with all ControlLogix generations including 5560 (L6x), 5570 (L7x), and 5580 (L8x) controllers in the 1756 chassis.
Q: What firmware version is required for Gigabit operation?
A: Firmware version 10.x or later is required to enable 1000 Mbps (Gigabit) link speed. Firmware can be updated via ControlFLASH or ControlFLASH Plus utilities.
Q: Can I use this module in a redundant controller system?
A: Yes. The 1756-EN2TK is supported in ControlLogix redundancy configurations when used with the 1756-RM2/A redundancy module and appropriate firmware.
Q: What is the maximum cable length for the RJ45 ports?
A: Per IEEE 802.3 standard, maximum copper twisted-pair segment length is 100 meters (328 ft) per port. For longer distances, use fiber media converters or Stratix managed switches with SFP fiber uplinks.
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