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- 1756-EN2TR
- ControlLogix ControlNet Communication Module
- USA
- 190 × 145 × 55 mm
- 0.48kg
- Xiamen, China
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Industrial Communication Module Technical Report
Model: 1756-EN2TR EtherNet/IP Dual-Port Redundant Communication Module
1. Product Overview
The 1756-EN2TR is a ControlLogix EtherNet/IP communication module designed for high-performance industrial Ethernet networking with built-in redundancy capabilities. It provides two independent Ethernet ports supporting Device Level Ring (DLR), linear, and star topologies.
It is widely used in modern automation systems where network reliability, high-speed data exchange, and redundancy are required.
The module integrates directly into the ControlLogix chassis and acts as a communication bridge between PLC controllers and Ethernet-based industrial devices.
2. Brand and Series Information
- Brand: Industrial automation control platform
- Series: ControlLogix 1756 Series
- Product Family: EtherNet/IP Communication Modules
- Module Type: Dual-Port Redundant Ethernet Module (DLR Enabled)
The 1756 platform is a modular PLC system designed for scalable industrial automation, supporting multiple communication protocols and distributed control architectures.
3. Product Description
The 1756-EN2TR module provides high-speed EtherNet/IP communication over two RJ45 copper ports. It supports redundant ring networks (DLR), improving system availability and fault tolerance.
It enables communication between ControlLogix controllers, remote I/O systems, drives, HMIs, and SCADA systems.
The module supports CIP messaging, real-time I/O communication, and network diagnostics. It is commonly used in systems requiring high availability and continuous operation.
It supports up to 256 CIP connections and 128 TCP/IP connections, making it suitable for large-scale distributed automation systems.
4. Technical Parameters
| Parameter | Specification |
|---|---|
| Communication Protocol | EtherNet/IP (CIP) |
| Network Type | Industrial Ethernet |
| Data Rate | 10/100 Mbps full duplex |
| Ethernet Ports | 2 × RJ45 |
| Topology Support | DLR, Linear, Star |
| TCP/IP Connections | up to 128 |
| CIP Connections | up to 256 |
| Motion Axes Support | up to 8 axes |
| Backplane Current | ~500 mA @ 5.1 V DC |
| Auxiliary Current | ~3 mA @ 24 V DC |
| Power Consumption | ~5.1 W |
| Thermal Dissipation | ~17.4 BTU/hr |
| Isolation Voltage | 30 V continuous |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5% – 95% non-condensing |
| Vibration Resistance | 2 G (10–500 Hz) |
| Shock Resistance | 30 G operating |
| Chassis Compatibility | 1756 ControlLogix chassis |
| Slot Width | 1 slot |
| Dimensions | approx. 190 × 145 × 55 mm |
| Weight | ~0.48 kg |
5. Product Applications
The 1756-EN2TR is widely used in industrial automation systems requiring redundant Ethernet communication:
- Automotive manufacturing production lines
- SCADA and distributed control systems
- Power generation and electrical grid automation
- Oil and gas processing facilities
- Chemical and petrochemical plants
- Large-scale packaging and logistics systems
- Industrial robotics and motion control systems
- High-availability manufacturing environments
It is especially suitable for systems requiring network redundancy and continuous operation.
6. Product Advantages
- Dual Ethernet ports with DLR redundancy support
- High connection capacity for complex systems
- Stable real-time CIP communication
- Supports multiple network topologies (ring, linear, star)
- High fault tolerance for industrial environments
- Flexible integration into ControlLogix architecture
- Supports motion control applications (up to 8 axes)
- Strong network diagnostics and monitoring capability
- Reliable operation under high industrial load
- Proven solution for mission-critical automation systems
7. Same Series / Related Models (ControlLogix Ethernet Family)
| Model | Function | Key Parameters |
|---|---|---|
| 1756-EN2TR | Dual-port DLR Ethernet module | 10/100 Mbps, 256 CIP, 0.48 kg |
| 1756-EN2T | Standard Ethernet module | Single port, 10/100 Mbps |
| 1756-EN2F | Fiber Ethernet module | Optical fiber communication |
| 1756-EN2TP | PRP redundant Ethernet module | Parallel redundancy protocol |
| 1756-ENBT | Legacy Ethernet module | Early EtherNet/IP generation |
8. Other Popular Modules in Same Ecosystem
| Model | Function | Key Parameters |
|---|---|---|
| 1756-L71 | PLC controller module | High-performance CPU, large memory |
| 1756-L72 | Advanced controller module | Faster processing and extended capacity |
| 1756-IF8 | Analog input module | 8-channel industrial analog input |
| 1756-OB16E | Digital output module | 16-point electronic output |
| 1756-IB16 | Digital input module | 16-channel industrial input |
9. Engineering Summary
The 1756-EN2TR is a high-reliability dual-port EtherNet/IP communication module designed for modern industrial automation systems requiring redundancy and stable real-time communication.
Its support for DLR ring topology significantly improves network resilience, making it a preferred choice for critical manufacturing and process control environments.
It remains one of the most widely used Ethernet modules in ControlLogix systems due to its balance of performance, redundancy, and scalability.