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1756-EN4TR

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Allen-Bradley 1756-EN4TR is a dual-port 1 Gbps ControlLogix EtherNet/IP module with CIP Security, 512 TCP connections, and support for up to 256 axes.
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Technical specifications for 1756-EN4TR

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-EN4TR
  • Product Family:
    ControlLogix
  • Product Type:
    1 Gigabit EtherNet/IP Communication Module
  • Stock:
    1
  • EtherNet/IP Rate:
    1 Gbps
  • TCP Connections:
    512
  • Security Capability:
    CIP Security
  • Motion Support:
    Up to 256 axes
  • CIP I/O Connections:
    1000
  • CIP Messaging Connections:
    528
  • Ethernet Ports:
    2 RJ45, Category 5E
  • Power Dissipation:
    6.12 W
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications CIP Security 1G Design Secure Recovery

Features:

•Dual-port 1 Gbps ControlLogix EtherNet/IP communication
•CIP Security capability with approved software and policy management
•512 TCP connections and support for up to 256 axes

The Allen-Bradley 1756-EN4TR serves high-capacity ControlLogix networks that require gigabit performance, resilient media options, or authenticated and encrypted CIP communication.

Deployment planning should align module firmware, Studio 5000, FactoryTalk Linx, Policy Manager, switch features, certificates, IP addressing, time services, and recovery ownership.

Before procurement, identify whether the module will run standard I/O, DLR, PRP, secure remote access, motion traffic, or a combination approved by the project architecture.

Availability is subject to Apter Power's current inventory and sourcing confirmation.

Allen-Bradley 1756-EN4TR 1 Gigabit EtherNet/IP Communication Module Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Allen-Bradley 1756-EN4TR 1 Gigabit EtherNet/IP Communication Module Specs

General

  • ManufacturerAllen-Bradley
  • Model1756-EN4TR
  • ConditionNew Original ready stock
  • Product FamilyControlLogix

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Secure communication preparation

•Identity: Document module and system trust requirements.
•Certificates: Preserve enrollment and renewal records.
•Policy: Export the approved deployment and rollback plan.
•Time: Verify synchronized clocks before security tests.

Gigabit network integration

•Switch ports: Confirm speed, duplex, VLAN, and QoS settings.
•Traffic model: Budget I/O, motion, messaging, and service traffic.
•Cabling: Use the approved industrial Ethernet media.
•Diagnostics: Record baseline errors and utilization.

Controlled replacement sequence

•Clean start: Confirm normal communication before policy deployment.
•Policy deploy: Apply only the approved security configuration.
•Fault test: Validate DLR or PRP recovery as designed.
•Rollback: Prove the authorized recovery path.
Description
1756-EN4TR is the 1 Gbps dual-port ControlLogix EtherNet/IP communication module with CIP Security capability. Rockwell Automation lists 512 TCP connections and extensive CIP messaging capacity for this model.

1756-EN4TR supports DLR and, with qualifying firmware, Parallel Redundancy Protocol configurations, while providing secure-access functions that depend on approved FactoryTalk and Studio 5000 system versions.

1756-EN4TR requires a documented security and recovery plan covering firmware, certificates, deployed policy, IP settings, port topology, switch capabilities, controller project, time synchronization, and rollback authority before replacement.
Revisions

Revision Part #

Also known as

1756-EN4TR Ser A
1756-EN4TR/A, Series A, Rev A
Alternative Names
1756-EN4TR 1756EN4TR 1756 EN4TR Allen-Bradley 1756-EN4TR AB 1756-EN4TR Rockwell 1756-EN4TR ControlLogix 1756-EN4TR ControlLogix 1G CIP Security EtherNet/IP module
Technical notes
Allen-Bradley 1756-EN4TR provides dual-port 1 Gbps EtherNet/IP communication with CIP Security and 512 TCP connections. Verify firmware, software, policy, and redundancy design.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What security records should be preserved before replacing Allen-Bradley 1756-EN4TR?
Preserve firmware, IP data, certificates, deployed security policy, trusted identities, time settings, project files, and an approved rollback plan.
Which software compatibility checks matter for Allen-Bradley 1756-EN4TR?
Verify Studio 5000, FactoryTalk Linx, Policy Manager, controller firmware, module firmware, switch features, and the approved security architecture.
Why can Allen-Bradley 1756-EN4TR communicate before CIP Security is deployed but fail afterward?
Review identity, certificate trust, policy scope, time synchronization, IP changes, firmware support, allowed cipher settings, and secured endpoints.
What should an Allen-Bradley 1756-EN4TR quotation request include?
Provide hardware series, firmware, security use, DLR or PRP role, axis count, controller, quantity, destination, and required date.
How should engineers choose between DLR and PRP for Allen-Bradley 1756-EN4TR?
Base the choice on the approved fault-tolerance architecture, switch and device support, firmware, cabling, recovery objectives, and test procedure.
What acceptance tests are appropriate for Allen-Bradley 1756-EN4TR?
Verify standard traffic first, then policy deployment, authenticated sessions, I/O, messaging, redundancy failover, diagnostics, time synchronization, and restart recovery.