Allen Bradley 1756-EN2TR ControlLogix 2-Port Ethernet Module

The AB 1756-EN2TR is a high-performance EtherNet/IP communication module designed for ControlLogix® systems. With two embedded copper Ethernet ports, this dual-port module supports linear, ring, or star topologies using an internal switch. It enables redundant networking and supports up to 128 TCP/IP connections, making it ideal for distributed I/O, HMI, and controller communications in demanding industrial environments.

This module operates at 10/100 Mbps with full-duplex auto-negotiation and provides reliable Ethernet bridging between ControlLogix chassis and the wider automation network.

Technical Specifications

Series: ControlLogix
Product Type: Communication Module
Model Number: 1756EN2TR
Network Interface: 2 x RJ45 (Copper Ethernet)
Data Rate: 10/100 Mbps, full-duplex
Protocol Support: EtherNet/IP, TCP/IP
Redundancy Support: Yes (for device-level ring and dual-port topologies)
Communication Capacity: 128 TCP/IP connections
Chassis Compatibility: All ControlLogix standard chassis
Firmware Compatibility: Studio 5000, RSLogix 5000 (v16 and above)

Electrical & Communication Specs

Power Supply Voltage: Supplied via ControlLogix backplane
Current Draw (5.1V): 1.2 A
Port Type: Dual embedded switch Ethernet ports
Port Speed: 10/100 Mbps, auto-negotiation
Max CIP Connections: 128
Communication Protocols:

• EtherNet/IP
• TCP/IP
• DHCP/BOOTP
• SNMP
• CIP Sync (IEEE 1588 Precision Time Protocol)

Mechanical Specifications

Width: 35 mm
Height: 145 mm
Depth: 140 mm
Mounting Type: Module insertion into ControlLogix chassis
Cooling Method: Passive (no fan)
Connection Type: Integrated RJ45 (front-facing)

Environmental Specifications

Operating Temperature: 0…60 °C
Storage Temperature: -40…85 °C
Humidity: 5–95% non-condensing
Vibration Resistance: IEC 60068-2 compliant
Shock Resistance: 30g
IP Rating: N/A (enclosed in chassis)

Compliance & Standards

Certifications: CE, cULus, KC, ATEX (when used with compatible chassis)
Standard Compliance: EN/IEC 61131-2, IEEE 802.3
RoHS Compliant: Yes
UL Listed: Yes (Class I Div 2 hazardous locations when properly installed)

Key Features & Benefits

✅ Dual-Port Embedded Switch – Enables flexible topology and device-level ring redundancy

✅ High Connection Count – Handles up to 128 EtherNet/IP connections for robust network scaling

✅ Real-Time Ethernet Comms – Fully supports CIP Sync and time-critical control with low latency

✅ Modular Integration – Easy snap-in installation to ControlLogix backplanes without special tools

✅ Industry Proven – Trusted module for ControlLogix networks across automotive, pharma, and process industries

📦 Buy the Allen Bradley 1756-EN2TR at Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 1756-EN2TR prices. With competitive trade pricing and fast shipping across the UK & EU, we support your automation systems with genuine ControlLogix communication hardware.

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Drive Outlet Megastore – your trusted partner for Rockwell Automation ControlLogix solutions.