Allen Bradley 1756-EN3TR ControlLogix Ethernet Module

The AB 1756-EN3TR is a high-performance dual-port Ethernet/IP communication module for the ControlLogix platform. With embedded switch technology and support for Device Level Ring (DLR) redundancy, this module enables robust network topologies and high-capacity communication between controllers, I/O modules, and CIP motion devices.

Featuring support for 128 TCP/IP connections, the 1756-EN3TR is ideal for demanding applications in motion control, safety, and real-time data transfer. It integrates seamlessly into Studio 5000 environments and supports linear, star, and DLR topologies.

Technical Specifications

Model: 1756EN3TR
Series: ControlLogix
Type: High-Capacity Ethernet/IP Communication Module
Communication Ports: 2 x 10/100 Mbps Copper (RJ45)
Integrated Switch: Yes – Embedded switch for DLR support
Redundancy: Yes – DLR and controller redundancy supported
Max CIP Connections: 256
Max TCP/IP Connections: 128
Backplane Interface: ControlLogix standard
CIP Motion Support: Yes
Compatible Software: Studio 5000 Logix Designer

Electrical Specifications

Power Supply Voltage: Supplied via 1756 backplane
Current Draw (5.1V): ~1.2 A
Current Draw (24V): 3 mA
Power Dissipation: 6.1 W
Thermal Dissipation: 20.8 BTU/hr
Isolation Voltage: 50V continuous (Ethernet ports to backplane)
Surge Protection: Yes (internal ESD and transient protection)

Network & Interface Specifications

Ethernet Speed: 10/100 Mbps, auto-sensing
Protocols Supported:
✅ EtherNet/IP
✅ CIP Motion
✅ CIP Safety
✅ IGMP Snooping for multicast optimization
❌ Modbus
❌ PROFIBUS
❌ TCP/IP (raw sockets)
❌ DeviceNet

Topology Support:

• Star
• Linear
• Device Level Ring (DLR)

Configuration Tools: Studio 5000 Logix Designer
Diagnostic Tools: Web-based diagnostics, Studio 5000 diagnostics

Mechanical Specifications

Enclosure Type: Open-style for 1756 chassis
Width: 35 mm
Height: 145 mm
Depth: 140 mm
Mounting Orientation: Chassis slot installation (ControlLogix)
Weight: Approx. 250 g
Connector Types:

• 2 x RJ45 for Ethernet
• 1 x USB (for configuration only)

Environmental Specifications

Operating Temperature: 0…60 °C
Storage Temperature: –40…85 °C
Relative Humidity: 5% to 95% non-condensing
Shock Rating: 30 g
Vibration Resistance: 2 g @ 10–500 Hz
Pollution Degree: 2
Enclosure Rating: IP20 (when installed in chassis)
Application Suitability: Industrial environments, enclosed systems

Compliance & Certifications

Certifications: UL, c-UL, CE, RoHS
Standards Met: EN 61131-2, EN 61000-6-2 / 6-4
EMC Compliance: Yes
Functional Safety: Not a safety-rated device
Use with: ControlLogix controllers and compatible chassis

Key Features & Benefits

✅ Dual-Port Ethernet – Embedded switch for topologies like DLR and star

✅ High-Capacity Connections – Supports up to 256 CIP and 128 TCP/IP connections

✅ CIP Motion Enabled – Real-time deterministic motion communication for advanced automation

✅ Studio 5000 Integration – Streamlined setup and diagnostics within Rockwell software

✅ Robust and Redundant – Industrial-grade reliability with integrated surge and ESD protection

📦 Order the Allen Bradley 1756-EN3TR from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 1756-EN3TR prices. This advanced ControlLogix Ethernet module is essential for building reliable, high-speed EtherNet/IP networks—available now with fast UK shipping and full product support.

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Drive Outlet Megastore – your trusted source for Allen Bradley ControlLogix communication and networking modules.