New Allen Bradley 1756-EN2TR EtherNet/IP Communication Module

The Allen-Bradley 1756-EN2TR is a dual-port EtherNet/IP communication module for the ControlLogix platform, designed to support Device Level Ring (DLR) topology for single-fault tolerant networks.

  • رقم الصنف :

    1756-EN2TR
  • الطلب (الحد الأدنى للكمية) :

    1 Piece
  • قسط :

    EXW
  • منشأ المنتج :

    USA
  • ميناء الشحن :

    Wuhan
  • مهلة :

    3~5 days
  • وزن :

    5kg
  • Product Details

     
     
    Specification Description
    Manufacturer Rockwell Automation (Allen-Bradley)
    Model 1756-EN2TR
    Product Family ControlLogix EtherNet/IP
    Product Type Dual-Port EtherNet/IP Communication Module
    Ethernet Ports 2 x Copper RJ45 (10/100 Mbps) 
    Communication Rate 10/100 Mbps
    Connections Supported (max) TCP: 128; CIP: 256 
    CIP Unconnected Messages 128 + 128 (backplane + Ethernet) 
    Redundancy Support Yes 
    DLR Support Yes – single-fault tolerant ring network 
    Current Draw 1 A @ 5.1V DC; 3 mA @ 24V DC 
    Power Dissipation 5.1 W 
    Thermal Dissipation 17.4 BTU/h 
    Isolation Voltage 30V continuous (Basic Insulation) 
    Slot Width
    Operating Temperature 0°C to +60°C 
    Storage Temperature -40°C to +85°C 
    Relative Humidity 5–95% non-condensing 
    Shock Operating: 30 G; Non-operating: 30 G 
    Vibration 2 G 
    Enclosure Type Open-style 
    Certifications ATEX T4, CE, cULus, RCM 
    Country of Origin Multiple countries based on manufacturing location 
    Lifecycle Status Active Mature – Still available, but not recommended for new projects 

    Related Product Model Recommendations

     
     
    Model Description Typical Application
    1756-EN2TR (this model) Dual-port EtherNet/IP, DLR support, 10/100 Mbps Redundant ControlLogix systems, DLR ring topology
    1756-EN2T Single-port EtherNet/IP, 10/100 Mbps Standard EtherNet/IP communication without DLR
    1756-EN4TR Official successor – Gigabit (10/100/1000 Mbps), 512 TCP connections, up to 256 motion axes, CIP Security, SD card slot  New projects, high-performance motion, cybersecurity
    1756-EN3TR Dual-port with extended motion (128 axes) Motion-intensive applications
    1756-EN2TXT Extreme environment version (-25 to +70°C) Harsh environments 
    1756-EN2TRXT DLR + extreme environment version DLR in harsh environments 
    1756-EN2TP Parallel Redundancy Protocol (PRP) support PRP network redundancy
    1756-EN2F Fiber optic media (LC connector) Long-distance or EMI-prone environments 

    Payment & Delivery

    FAQs

    Q1: What is the primary function of the 1756-EN2TR?

    The 1756-EN2TR is a dual-port EtherNet/IP communication module for ControlLogix controllers. It performs the same functions as the 1756-EN2T but adds support for Device Level Ring (DLR) topology, providing single-fault tolerant network redundancy .

    Q2: What is DLR and why is it important?

    DLR (Device Level Ring) is a network topology that allows devices to be connected in a ring. If a cable breaks or a device fails, the network automatically redirects traffic through the alternate path, ensuring continuous communication. The 1756-EN2TR can act as a ring supervisor or ring node in a DLR network .

    Q3: Is the 1756-EN2TR still recommended for new projects?

    No. Rockwell Automation lists the 1756-EN2TR as Active Mature, meaning it is still available and supported, but not recommended for new projects. The official successor is the 1756-EN4TR, which offers gigabit speeds, more connections, motion support, and built-in CIP Security .

    Q4: What are the maximum connections supported?

    The 1756-EN2TR supports up to 128 TCP connections and 256 CIP connections .

    Q5: Can I replace a 1756-EN2TR with a 1756-EN4TR directly?

    In most cases, yes. The 1756-EN4TR is a drop-in replacement for the EN2TR in most applications. However, exceptions include: ControlLogix 5570 controllers requiring SIL2 safety certification, redundant chassis pairs (only EN2 series is officially certified), and projects with strict firmware version matching requirements.

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