Allen-Bradley 1768-ENBT CompactLogix EtherNet/IP Communication Module

The 1768-ENBT is a CompactLogix EtherNet/IP Communication Module developed by Allen-Bradley to provide dedicated Ethernet networking capabilities for 1768 control systems. This module establishes reliable data transmission links across an industrial network, enabling seamless connectivity with multiple Logix5000 controllers, supervisory computers, and auxiliary automation equipment. It processes network traffic over a integrated communication interface while managing local status via an alphanumeric display and built-in diagnostic indicators. Designed as an open-type component, it installs directly within a synchronized hardware stack consisting of a 1768 controller and compatible power supplies to optimize throughput and minimize communication downtime.

Features

• Provides automated data management over EtherNet/IP networks to reduce packet collisions and sustain optimal bandwidth.
• Features an integrated alphanumeric display and three bi-color diagnostic status indicators (NET, Link, and OK) for rapid local troubleshooting.
• Supports high-speed data transmission over standard Category 5 or Category 5e cabling using a rugged RJ45 connector interface.
• Implements reliable electrical protection with a continuous functional insulation rating of 30V between the Ethernet network and internal system circuits.
• Interfaces directly with specialized 1768 CompactLogix system components and supports flexible expansion using combined 1769-series I/O modules.

Applications

• Distributed industrial automation and manufacturing plant network management.
• Inter-controller data synchronization across multiple Logix5000 systems.
• SCADA network routing and remote control system interface integration.

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Plan for a minimum hardware clearance of 105 mm (4 in.) at the top and bottom, and 90 mm (3.54 in.) on the sides from enclosure walls, wireways, and adjacent machinery.
• Ensure the system is grounded through the DIN rail to the chassis ground by utilizing zinc-plated yellow-chromate steel DIN rail; avoid aluminum or plastic rails which can oxidize and cause poor conductivity.
• Secure the mounting DIN rail to the surface approximately every 200 mm (7.87 in.) and install appropriate end-anchors to hold modules firmly.
• If choosing panel mounting instead of DIN rail installation, mark pilot holes using the hardware as a template, drill holes for M4 or #8 screws, and tighten to 1.16 N.m (10 lb.in) of torque. Do not use screws and DIN rail concurrently.
• Connect the network interface cable to a 100 MB Ethernet switch rather than a shared hub to increase network bandwidth and reduce lost packets.
• Never connect or disconnect network communication cables while power is actively applied, as an electrical arc can occur and present an explosion hazard in certified environments.
• Always wait for all diagnostic status lights on the power supply and controller to turn completely off before disconnecting any system module to allow the processor sufficient time to finish writing project parameters to non-volatile memory.
• Mitigate static risks by touching a grounded object, wearing an approved grounding wriststrap, and strictly avoiding contact with component board pins, connectors, or internal circuit elements.

Compliance and Certifications

• c-UL-us Listed Industrial Control Equipment, Certified for US and Canada (UL File E65584)
• c-UL-us Listed for Class I, Division 2 Group A, B, C, D Hazardous Locations, Certified for US and Canada (UL File E194810)
• CE Certified (European Union 2004/108/EC EMC Directive, compliant with EN 61326-1, EN 61000-6-2, EN 61000-6-4, and EN 61131-2)
• C-Tick Compliant (Australian Radiocommunications Act, compliant with AS/NZS CISPR 11)
• Ex Certified (European Union 94/9/EC ATEX Directive, compliant with EN 60079-15 and EN 60079-0; II 3 G Ex nA IIC T4)
• EtherNet/IP ODVA Conformance Tested