Description
Allen‑Bradley 1756-EN2TR ControlLogix Dual Port EtherNet/IP Communication Module
Product Description
The 1756-EN2TR is a high-performance dual-port EtherNet/IP communication module for Rockwell Allen‑Bradley ControlLogix PLC rack. Equipped with an embedded two-port Ethernet switch, it supports Device Level Ring (DLR) network topology to realize fault-tolerant ring networking for industrial EtherNet/IP devices. It enables real-time CIP I/O messaging, program download, tag data exchange between ControlLogix controller, remote I/O racks, HMI, SCADA and other EtherNet/IP field devices. The module communicates with the CPU via the ControlLogix backplane, supports up to 128 TCP connections and 256 CIP connections. It is hot-swappable, with LED status indicators for network diagnostic, widely deployed for high-availability industrial control systems in process and discrete manufacturing.
1756-EN2TR
Technical Specifications
- Part Number: 1756-EN2TR
- Manufacturer: Rockwell Automation (Allen‑Bradley)
- Series: ControlLogix 1756 Series
- Device Type: EtherNet/IP Communication Module
- Ethernet Ports: 2 × RJ45 copper ports, 10/100 Mbps auto-sensing
- Network Topology: DLR (Device Level Ring), linear, star
- Max TCP Connections: 128
- Max CIP Connections: 256
- Backplane Current Draw: 1.0A @5.1VDC; 3mA @24VDC
- Power Dissipation: 5.1W
- Operating Temperature: 0°C ~ +60°C
- Storage Temperature: -40°C ~ +85°C
- Relative Humidity: 5%~95%, non-condensing
- Mounting: Single slot in ControlLogix chassis
- Hot Swap: Supported
- Isolation: Basic insulation between Ethernet and backplane
- Certifications: CE, UL, ATEX Class I Div.2
- Weight: Approx. 0.28 kg
Key Features
- Dual RJ45 EtherNet/IP port with integrated switch supporting DLR ring redundancy
- Deterministic CIP real-time I/O communication for remote EtherNet/IP I/O
- Hot-swappable for rack maintenance without full system shutdown
- Rich LED indicators for module, link, network and fault diagnosis
- Supports program upload/download, tag reading/writing for HMI and SCADA
- High connection capacity for large EtherNet/IP device networks
- ATEX Class I Div.2 certified for hazardous industrial cabinet installation
- Seamless integration with RSLogix 5000 / Studio5000 programming environment
1756-EN2TR
Application Scenarios
- Petrochemical and refinery PLC control systems
- Power plant auxiliary and boiler control
- Automotive assembly line manufacturing automation
- Water & wastewater treatment plant distributed control
- Material handling, conveyor and packaging line control
- Mining and cement factory industrial control networks
- Food & beverage batch and continuous production control
- Large factory EtherNet/IP ring network architecture
Matching / Auxiliary Components
- ControlLogix 1756 chassis and backplane
- ControlLogix CPU (1756-L71, L72, L73, L81E etc.)
- 1756 series AI/AO/DI/DO I/O modules
- EtherNet/IP remote I/O adapters (1734-AENTR, 1738-AENTR)
- Shielded CAT5e industrial Ethernet cables
- Studio5000 / RSLogix5000 configuration software
- Industrial managed/unmanaged Ethernet switches
- Redundant rack power supply 1756-PA75 / PB72
Related Rockwell ControlLogix Series Models (9 pcs)
- 1756-EN2TR Dual Port DLR EtherNet/IP Module
- 1756-EN3TR 3-Port EtherNet/IP Module
- 1756-EN4TR 4-Port EtherNet/IP Module
- 1756-EN2TRK Conformal Coated EN2TR
- 1756-EN2TRXT Extended Temperature Version
- 1756-L81E ControlLogix Controller
- 1756-PB72 ControlLogix Power Supply
- 1756-IF16 16CH Analog Input Module
- 1756-OB16E Digital Output Module
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