1. Product Description

1756‑EN4TR is a high‑performance gigabit EtherNet/IP communication module designed for Rockwell Automation ControlLogix 1756 series chassis, manufactured by Allen‑Bradley. It acts as a high‑speed bridge between the ControlLogix backplane and industrial EtherNet/IP networks, supporting dual 10/100/1000 Mbps twisted‑pair RJ45 ports with embedded industrial switch functionality.

Core Technical Specifications: 1. Network Interfaces: Dual isolated Gigabit RJ45 copper ports, auto‑sensing 10/100/1000BASE‑T full/half duplex 2. Connection Capacity: Max 512 TCP connections, up to 1000 CIP I/O connections, supports 256 motion servo axes 3. Network Topology: DLR, MRP, Linear, Star, PRP parallel redundancy protocol supported 4. Security: Native CIP Security for encrypted industrial data transmission, user access authentication 5. Backplane Compatibility: All 1756 ControlLogix chassis, hot‑swappable module design 6. Environmental Rating: Operating temperature 0°C ~ +60°C; conformal coated variant 1756‑EN4TRK for corrosive environments 7. Electrical: Powered via 1756 chassis backplane, no external power required 8. Physical & Weight: Standard single‑slot 1756 module; Gross weight ~0.31kg 9. Certifications: UL, CE, IECEx hazardous location approval, Class I Div 2 certified 10. Software Compatibility: RSLogix 5000 / Studio 5000 V24.00+; RSLinx Classic / FactoryTalk Linx V6.11+ for CIP Security

2. Core Product Functions

• Gigabit EtherNet/IP High‑Speed Data Routing Transfers bidirectional real‑time control data between Logix controllers and field EtherNet/IP devices including distributed I/O, VFDs, servo drives, HMI, SCADA and historians with gigabit bandwidth to eliminate network bottlenecks in large automation systems.
• Dual‑Port Embedded Switch & Redundant Networking Two independent RJ45 ports enable DLR device‑level ring topology or redundant adapter pair (RAP) setup; seamless network switchover without I/O connection loss during single cable/port failure.
• High‑Density Motion Control Support Handles up to 256 CIP motion axes for coordinated multi‑servo production lines, optimized low RPI jitter for precision motion control applications.
• CIP Security Industrial Data Encryption Built‑in CIP Security protocol provides data integrity, authentication and end‑to‑end encryption to prevent unauthorized access and tampering in critical manufacturing networks.
• Comprehensive Redundancy & Fault Tolerance Supports PRP parallel redundancy protocol and redundant adapter pairs; maintains uninterrupted I/O and messaging communication during single network path failure.
• On‑Board Diagnostic & Status Monitoring Multi‑color LED indicators (OK, NET A/B, Link/Activity) plus alphanumeric display to show module health, IP address, link status and fault codes for rapid on‑site troubleshooting.
• Hot‑Swap & Offline Configuration Storage Hot‑swappable without full chassis power down; module firmware and network configuration stored in non‑volatile flash memory for fast spare replacement recovery.
• Multi‑Network Traffic Segmentation & QoS Scheduling Prioritizes real‑time Class 1 I/O motion traffic over non‑critical HMI/historian messaging to guarantee deterministic control performance on busy plant networks.

3. Typical Application Scenarios

• Automotive Assembly & Robotic Welding Lines Central ControlLogix communication backbone for multi‑axis servo robots, safety I/O blocks and production HMIs with redundant ring DLR networks.
• Large Packaging & Material Handling Systems Conveyor drives, palletizing robots, weighing stations and barcode scanner distributed I/O high‑density EtherNet/IP networking.
• Oil & Gas Refinery & Pipeline Control Systems Hazardous Class I Div 2 certified module for DCS integration, remote valve actuators and flow transmitter communication with CIP security protection.
• Water & Wastewater Treatment Plants Redundant network architecture for pump VFDs, level sensors, dosing controllers and SCADA supervisory monitoring.
• Food & Beverage Batch Processing High‑speed motion control for filling, labeling and packaging machinery; hygienic factory network isolation with encrypted CIP data transfer.
• Power Generation Turbine & Substation Automation Real‑time communication between main control PLCs, generator governors and grid monitoring protection relays.
• Industrial Machine Retrofit & Large‑Scale Plant Expansion Upgrade legacy 1756‑EN2T/EN3TR modules to gigabit bandwidth for increased I/O and motion device count without chassis replacement.

4. Common Faults & Troubleshooting Solutions

5. Import & Compliance Supporting Documents

1. Customs Documents: Certificate of Origin (COO), Factory Certificate of Conformity (COC), UL/CE/IECEx Hazardous Location Certification 2. Safety Files: SDS/MSDS for industrial electronic communication module components 3. Technical Data: Official 1756‑EN4TR datasheet, installation wiring manual, firmware release notes, CIP Security configuration guide 4. HS Code: 85176290 Industrial EtherNet/IP Communication Controller Module 5. Country of Origin: Multi‑region manufacturing; Gross Weight: ~0.31kg 6. Lead Time: In stock 3~7 working days; factory original order 8~12 weeks 7. Matching Accessories: Industrial CAT6A shielded Ethernet cable, spare chassis slot filler module, conformal coating variant (1756‑EN4TRK), DLR network termination resistors