Description

The Allen-Bradley 1756-ENET is a legacy ControlLogix Ethernet communication module designed to provide robust networking capabilities for industrial automation systems. Operating within the ControlLogix platform, this module facilitates both implicit messaging for real-time I/O control and explicit messaging for configuration, programming, and data transfer with operator interfaces. It acts as an effective bridge between Logix controllers and Ethernet-enabled devices.

Engineered for versatility, the 1756-ENET module functions flexibly as either a scanner or an adapter on the network. It supports both direct connections and rack-optimized connections, allowing system architects to optimize data traffic and backplane bandwidth according to specific application needs. The module occupies a single slot in a ControlLogix chassis and integrates seamlessly into legacy Ethernet infrastructures utilizing standard 10 Mbps communication speeds.

Features

• Dual physical ports including one RJ45 Ethernet port and one AUI (Attachment Unit Interface) port
• Supports both scanner and adapter operational modes for flexible network architectures
• Handles explicit messaging for configuration and programming alongside implicit messaging for real-time I/O data
• Supports rack-optimized and direct connection methods to optimize controller backplane resource utilization
• Occupies a single standard slot width in any 1756 ControlLogix chassis
• Standard open-style industrial enclosure rating

Applications

• Legacy ControlLogix distributed I/O network management
• Real-time plant floor data collection and controller-to-controller messaging
• Interface linking for Human Machine Interfaces (HMIs) and programming workstations
• Supervisory control and data acquisition (SCADA) network integration

Technical Specifications

Connections / Interfaces

The 1756-ENET module features two distinct physical connection options on the front faceplate to interface with network infrastructure:

• Ethernet Port: Standard RJ45 connection used for connecting to 10 Mbps Ethernet local area networks.
• AUI Port: Attachment Unit Interface port allowing connection via transceiver cables to older network media such as coaxial thicknet or thinnet infrastructures.

Installation Guidelines

Ensure power is removed from the ControlLogix chassis before installing or removing the 1756-ENET module. Insert the module vertically into any available single slot of a 1756 chassis, making certain the backplane connector seats properly and securely fasten the top and bottom retaining screws. Configure the module IP address and network parameters using RSLinx and RSLogix 5000 software prior to runtime operation.