1769-AENTR Allen-Bradley Compact I/O Ethernet Comm Module

Product Overview

The Allen-Bradley 1769-AENTR is a high-performance CompactLogix EtherNet/IP adapter designed to provide a reliable bridge between 1769 Compact I/O modules and an Ethernet network. Featuring dual 10/100 Mbps Ethernet ports with an embedded switch, this module supports Device Level Ring (DLR) and linear topologies, significantly reducing the need for external switches. With the capacity to handle up to 128 simultaneous EtherNet/IP connections, it is an ideal solution for distributed I/O applications in automotive, packaging, and water treatment industries.

Technical Configuration

• Manufacturer: Allen-Bradley (Rockwell Automation)
• Full Model: 1769-AENTR
• Communication: Dual-port EtherNet/IP (Embedded Switch)
• Connection Capacity: 128 EtherNet/IP / 96 TCP/IP
• Current Draw: 500mA at 5V DC
• Mounting: 35mm DIN rail or Panel Mount
• Compatibility: 1769 Compact I/O Modules

Technical Specifications

Key Features & Operational Benefits

1. Network Resiliency with DLR: The 1769-AENTR supports Device Level Ring (DLR) topology. This allows the network to maintain communication even if a single cable break occurs, increasing uptime in critical machine automation and material handling systems without the cost of redundant hardware.

2. Simplified Architecture: By eliminating the need for standalone Ethernet switches between every module, the 1769-AENTR reduces panel space and wiring costs. Its integrated switch simplifies the daisy-chaining of distributed I/O drops, making it easier to integrate remote racks into a single Logix platform.

3. Seamless Migration: This adapter protects existing I/O investments by allowing users to upgrade their controllers to newer Logix processors while keeping their existing 1769 I/O modules. Remote monitoring and diagnostics are enabled immediately through its robust Ethernet connectivity.

Installation Guidelines

Mounting: Mount the unit on a standard 35mm DIN rail. Ensure the module is securely latched using the DIN rail mounting clip. When connecting to the 1769 backplane, ensure the tongue-and-groove slots are aligned before sliding the modules together.

Network Setup: Use Category 5e (or better) shielded twisted-pair cables. Set the unique IP address using the three rotary switches (range 001-254) for quick manual setup, or set them to 888 for a factory reset.

Clearance: Maintain at least 50mm (2 in) of clearance on all sides to allow for proper heat dissipation. This is critical for maintaining the 60°C maximum operating temperature rating in high-density enclosures.

Technical FAQs

Q: How many I/O modules can a single 1769-AENTR support?
A: It can support up to 30 modules across three I/O banks, depending on the power supply capacity and the specific requirements of the connected modules.

Q: Does it support Power over Ethernet (PoE)?
A: No, the 1769-AENTR requires a separate 5V DC power source, typically provided through the 1769 CompactLogix backplane and power supply.

Q: Can I use the two ports for different subnets?
A: No, the dual ports act as an unmanaged switch on the same subnet, intended for daisy-chaining or DLR ring configurations.