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      Allen-Bradley 1756-ENBT
      Allen-Bradley 1756-ENBT
      Allen-Bradley 1756-ENBT
      Allen-Bradley 1756-ENBT
      Allen-Bradley 1756-ENBT
      Allen-Bradley 1756-ENBT

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      ControlLogix EtherNet/IP bridge module

      1756-ENBT

      Product Information:

      The Allen-Bradley 1756-ENBT is a single-slot ControlLogix EtherNet/IP bridge with a 10/100Base-T RJ45 port. It connects a ControlLogix chassis to EtherNet/IP networks and supports the documented TCP and CIP connection capacities for controller messaging, distributed I/O and supervisory communication.

      Product image is representative; revision or series may vary. Contact us to request a specific version.
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        • PRODUCT OVERVIEW

          What is this product?

          The Allen-Bradley 1756-ENBT is a single-slot ControlLogix EtherNet/IP bridge with a 10/100Base-T RJ45 port. It connects a ControlLogix chassis to EtherNet/IP networks and supports the documented TCP and CIP connection capacities for controller messaging, distributed I/O and supervisory communication.

          Selection basis

          The 1756-ENBT is discontinued and Rockwell Automation identifies 1756-EN2T as a functional replacement. Replacement still requires engineering review of connections, messaging, I/O ownership, firmware and network settings.
        • APPLICATIONS

          Where it may be used

          Typical industries that use an EtherNet/IP bridge to connect ControlLogix chassis traffic with plant-level Ethernet networks.

          Automotive Manufacturing

          Links controller cells to plant Ethernet supervisory networks.

          Oil & Gas

          Connects compressor and terminal controllers with supervisory systems.

          Water & Wastewater

          Integrates treatment PLCs with operations and historian networks.

          Pharmaceuticals

          Supports controller communications across validated production areas.
      Technical specifications for

      1756-ENBT

      0 TECHNICAL PARAMETERS
      • Manufacturer:
        Allen-Bradley
      • Product Category:
        PLC and Machine Control
      • Product family:
        ControlLogix 1756
      • Module type:
        EtherNet/IP bridge
      • Chassis slots:
        1
      • Ethernet interface:
        10/100Base-T
      • Connector:
        RJ45
      • TCP connections:
        64
      • CIP connections:
        128
      • Backplane current at 5.1 V:
        700 mA
      • Backplane current at 24 V:
        3 mA
      • Power dissipation:
        3.7 W
      • Isolation voltage:
        30 V continuous
      • Operating temperature:
        0...60 °C
      • Lifecycle:
        Discontinued 31 December 2021
      • Named functional replacement:
        1756-EN2T
      • Stock Availability:
        5
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      BUYER INFORMATION

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        Factory Sealed

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      • 03

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        New and current product sourced through the manufacturer or authorized supply channel when expressly confirmed in the quotation.

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      Revisions

      Revision Part #

      Also known as

      1756-ENBT Series A
      1756-ENBT/A, Series A, Rev A
      Get Parts Quote

      Alternative Names

      1756ENBT 1756-ENBT/A 1756-ENBT/B ControlLogix EtherNet/IP Bridge 1756 ENBT

      Information

      Overview Manuals EtherNet/IP Bridge Connection Capacity Migration Review

      Features:

      • Network identity: 1756-ENBT is a single-slot ControlLogix EtherNet/IP bridge with one 10/100Base-T RJ45 interface.
      • Connection capacity: Supports the documented TCP and CIP connections for controller messaging, distributed I/O and supervisory communication.
      • Verification focus: Preserve the chassis slot, IP configuration, firmware, connection loading, requested packet intervals and network topology before replacement.
      Allen-Bradley 1756-ENBT connects a ControlLogix chassis to an EtherNet/IP network through a 10/100Base-T copper interface. It exchanges controller messages, distributed-I/O traffic and supervisory data according to the installed network configuration. Firmware revision, chassis slot, IP addressing and configured connection load are part of the replacement identity.

      The technical content for 1756-ENBT is limited to the Rockwell Automation product page and publications 1756-IN019 and 1756-TD003. Rockwell Automation identifies 1756-EN2T as the functional replacement, but migration still requires review of connection capacity, network settings, firmware, electronic keying and controller project configuration.

      The Allen-Bradley 1756-ENBT EtherNet/IP communication module is supported by Moore Automated for verified legacy replacement and network-migration requirements.
      Allen-Bradley 1756-ENBT documentation and product resources.Important Notice: Confirm the complete catalog number, hardware revision and required controlled-document revision before replacement.

      The bridge exchanges controller, distributed-I/O and supervisory traffic through one 10/100Base-T RJ45 interface. Preserve the engineered network path and connection allocation.

      Review the documented 64 TCP and 128 CIP connection limits against the live project, produced/consumed tags, messages, HMI sessions and I/O adapters.

      Rockwell Automation names 1756-EN2T as a functional replacement. Confirm firmware, addressing, connection behavior, chassis loading and project changes before migration.

      Technical notes

      The Allen-Bradley 1756-ENBT is a single-slot ControlLogix EtherNet/IP bridge with a 10/100Base-T RJ45 port. It connects a ControlLogix chassis to EtherNet/IP networks and supports the documented TCP and CIP connection capacities for controller messaging, distributed I/O and supervisory communication. Source: Rockwell Automation 1756-IN019 installation instructions and product record Match 1756-ENBT, hardware series, firmware, chassis slot, 10/100Base-T interface and the documented 64 TCP / 128 CIP connection capacity before replacement. Record IP settings, switch port, connection loading and module status. Treat 1756-EN2T as an engineered migration, not an automatic drop-in, and validate controller communications after installation.

      Bridge Identity & Capacity

      Match 1756-ENBT, hardware series, firmware, chassis slot, 10/100Base-T interface and the documented 64 TCP / 128 CIP connection capacity before replacement.

      Network & Migration Checks

      Record IP settings, switch port, connection loading and module status. Treat 1756-EN2T as an engineered migration, not an automatic drop-in, and validate controller communications after installation.

      Customs & shipping dimensions / weight

      • Packed shipping dimensions
        Confirmed after final packing
        The module measures approximately 3.5 x 14.0 x 14.5 cm before packing; final packed dimensions are recorded after protective packing.
      • Packed shipping weight
        Confirmed after final packing
        Approximate net weight is 0.22 kg; final gross shipping weight is recorded after protective packing.
      • HS / customs code
        8537101190
        China customs classification for programmable-control apparatus; destination-country classification is confirmed by the customs declarant.
      • Country of origin
        USA
        The Rockwell Automation product record identifies United States of America; verify the supplied unit from its nameplate and shipment documents.
      • Ships from
        Xiamen, Fujian, China
        Dispatch location, quantity and handling time are confirmed in the written quotation.
      • Customs documents
        Confirmed for the destination
        Invoice, packing-list and origin-document requirements are agreed with the order.
      PRODUCT & ORDER FAQS

      Questions buyers ask about 1756-ENBT

      • What network interface does the 1756-ENBT provide?

        It provides one 10/100Base-T EtherNet/IP interface through an RJ45 connector.

      • How many TCP connections are documented?

        The Rockwell Automation product record lists 64 TCP connections for this exact module.

      • How many CIP connections are documented?

        The product record lists 128 CIP connections, subject to the complete application design.

      • How much backplane power does it use?

        The documented demand is 700 mA at 5.1 V DC plus 3 mA at 24 V DC, with 3.7 W dissipation.

      • Is the 1756-ENBT still active?

        No. Rockwell Automation lists it as discontinued as of 31 December 2021.

      • Is 1756-EN2T an automatic drop-in replacement?

        No. It is the named functional replacement, but firmware, connections, addressing and project behavior require engineering review.

      • What should be recorded before replacement?

        Record the IP configuration, hardware series, firmware, chassis slot, switch port, connection loading and status indicators.

      • What information is needed for quotation?

        Provide quantity, complete nameplate, hardware series, firmware, network role, destination and required delivery date.
      All FAQ
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          • 20+ years of experience

            Over 20 years of experience in industrial automation and hard-to-source legacy parts.

          • Product Lifecycle Stage

            Discontinued / Replacement Available

            Rockwell Automation lists 1756-ENBT as discontinued since December 31, 2021 and identifies 1756-EN2T as the functional replacement. Before migration, compare chassis slot, IP configuration, firmware, connection capacity, network topology, electronic keying and the controller project.

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          Moore Disclaimer: Moore Automated's sales automation equipment and related solutions are intended for industrial automation and business operational efficiency improvement purposes only. Product information, technical parameters, and application cases are for reference only and do not constitute an absolute guarantee of performance for any specific industry, scenario, or final application. Actual equipment performance may vary depending on factors such as the usage environment, system integration method, and maintenance conditions. Users should confirm compatibility and safety based on professional technical assessments. Moore Automated assumes no liability for any direct or indirect losses caused by improper use, modification, or failure to operate according to specifications, to the extent permitted by law.

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