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- ControlLogix ControlNet Communication Module
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- 140 × 145 × 35 mm
- 0.3kg
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Industrial Communication Module Technical Report
Model: 1756-EN2TK EtherNet/IP Communication Module
1. Product Overview
The 1756-EN2TK is a ControlLogix EtherNet/IP communication module designed for high-speed industrial Ethernet networking with enhanced reliability and diagnostic capabilities. It enables a PLC system to communicate with distributed devices such as controllers, remote I/O, HMIs, drives, and SCADA platforms over an industrial Ethernet backbone.
This module belongs to the advanced Ethernet communication family and is used in systems requiring stable, deterministic data exchange with improved network management features compared to standard EN2T modules.
It is designed as a single-slot module integrated into the ControlLogix chassis architecture.
2. Brand and Series Information
- Brand: Industrial automation control platform
- Series: ControlLogix 1756 Series
- Product Family: EtherNet/IP Communication Modules
- Module Type: Enhanced Ethernet Communication Module
The 1756 series supports modular PLC architecture, allowing flexible configuration of control, communication, and I/O modules in a unified industrial system.
3. Product Description
The 1756-EN2TK provides EtherNet/IP communication over copper RJ45 interfaces. It supports 10/100 Mbps industrial Ethernet communication and is optimized for high connection density and stable network performance.
The module supports CIP (Common Industrial Protocol) messaging, allowing real-time control, diagnostics, and data exchange between PLCs and field devices.
Compared with standard Ethernet modules, this version provides improved network handling, stronger diagnostic functions, and better performance stability under heavy communication loads.
It integrates directly into the ControlLogix backplane and is commonly used in medium to large-scale automation systems.
4. Technical Parameters
| Parameter | Specification |
|---|---|
| Communication Protocol | EtherNet/IP (CIP) |
| Network Type | Industrial Ethernet (Copper RJ45) |
| Data Rate | 10/100 Mbps |
| Ethernet Ports | 1 × RJ45 |
| TCP Connections | up to 128 |
| CIP Connections | up to 256 |
| Device Connections | up to 64–128 (system dependent) |
| Power Consumption | ~5.5 W |
| Current Draw | ~1.1 A @ 5.1V DC |
| Auxiliary Current | 3 mA @ 24V DC |
| Thermal Dissipation | ~18 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. 140 × 145 × 35 mm |
| Weight | ~0.30 kg |
5. Product Applications
The 1756-EN2TK is widely used in industrial automation systems requiring robust Ethernet communication:
- Large-scale manufacturing automation systems
- SCADA monitoring and control systems
- Power generation and distribution networks
- Oil and gas production facilities
- Automotive assembly lines
- Chemical processing plants
- Material handling and logistics systems
- Industrial machine-to-machine communication networks
It is particularly suitable for systems requiring high network stability and strong communication load handling.
6. Product Advantages
- Enhanced EtherNet/IP communication performance
- High connection capacity for complex systems
- Stable real-time CIP communication
- Improved diagnostic and network handling features
- Compatible with ControlLogix modular architecture
- Reliable performance under heavy traffic loads
- Strong industrial environmental resistance
- Flexible integration into modern automation systems
- Supports large distributed control networks
- Proven stability in continuous industrial operation
7. Same Series / Related Models (ControlLogix Ethernet Family)
| Model | Function | Key Parameters |
|---|---|---|
| 1756-EN2TK | Enhanced EtherNet/IP module | 10/100 Mbps, high connection density |
| 1756-EN2T | Standard Ethernet module | 10/100 Mbps, widely used baseline model |
| 1756-EN2TR | Redundant Ethernet module | Dual-port ring redundancy support |
| 1756-EN2F | Fiber Ethernet module | Optical fiber communication, EMI resistant |
| 1756-ENBT | Legacy Ethernet module | Early-generation EtherNet/IP support |
8. Other Popular Modules in Same Ecosystem
| Model | Function | Key Parameters |
|---|---|---|
| 1756-L71 | PLC controller module | High-performance CPU, large memory capacity |
| 1756-L72 | Advanced PLC controller | Faster execution and expanded program handling |
| 1756-IF8 | Analog input module | 8-channel industrial analog acquisition |
| 1756-OB16E | Digital output module | 16-point electronic output control |
| 1756-IB16 | Digital input module | 16-channel industrial input module |
9. Engineering Summary
The 1756-EN2TK is an enhanced EtherNet/IP communication module designed for industrial automation systems requiring higher communication stability and stronger network performance than standard Ethernet modules.
It improves system reliability under high-load communication conditions and is well suited for distributed automation environments with complex data exchange requirements.
Within ControlLogix systems, it serves as a key Ethernet backbone interface for modern industrial networking.