Allen-Bradley 1756-EN2F
Allen-Bradley 1756-EN2F
Allen-Bradley 1756-EN2F
Allen-Bradley 1756-EN2F
Allen-Bradley 1756-EN2F
Allen-Bradley 1756-EN2F
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1756-EN2F

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Allen-Bradley 1756-EN2F is a ControlLogix EtherNet/IP communication module designed for high-speed industrial networking using multimode fiber connectivity. It supports 100 Mbps fiber communication with LC interface, enabling stable and reliable data exchange within automation systems.
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Technical specifications for 1756-EN2F

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-EN2F
  • Product Family:
    ControlLogix
  • Product Type:
    CLX ENet/IP 100M Fiber Communication Module
  • Communication:
    Ethernet/IP
  • Display:
    Digital
  • Enclosure:
    None (open-style)
  • Mounting:
    Chassis
  • Special Features:
    Fiber Optic
  • Sub Brand:
    ControlLogix
  • Communication:
    Ethernet/IP
  • Interface:
    1 Fiber MM LC (100 Mbps)
  • Number Of Channels:
    1
  • Power dissipation:
    6.2 W
  • Thermal dissipation:
    21.28 btu/h
  • Enclosure type rating:
    None (open-style)
  • Ethernet ports:
    1 Ethernet fiber
  • CIP unconnected messages:
    128 + 128 (backplane + Ethernet)
  • Current draw:
    1.2A @ 5.1V DC, 3mA @ 24V DC
  • Ethernet cable:
    Multimode fiber, LC connector
  • Wiring category:
    3 - on USB ports
  • Communication rate:
    10/100 Mbps
  • Connections supported, max:
    TCP: 128, CIP: 256 (CIP connections can be used for all explicit or all implicit applications. for exAle, a 1756-ENBT module has a total of 128 CIP connections that can be used for any combination of connections.)
  • Isolation voltage:
    30V (continuous), basic insulation type, USB to backplane type tested at 980V AC @ 60s
  • Slot width:
    1
  • ATEX temp code:
    T4
  • Transmitter launch power, min:
    At beginning of Life (BOL): -19 dBm into 62.5/125 µm fiber, N/A = 0.275, -22.5 dBm into 50/125 µm fiber, N/A = 0.20, Allow -1 dB at End of Life (EOL)
  • Surrounding air temperature, max:
    60 °C
  • Storage temperature:
    -40 °C <85 °C (-40 °F <185 °F)
  • Emissions:
    CISPR 11: Class A
  • Vibration:
    2 G @ 10...500 Hz
  • ESD immunity:
    6 kV contact discharges, 8 kV air discharges
  • Relative humidity:
    5...95% noncondensing
  • Shock:
    Operating: 30 G, Nonoperating: 30 G
  • Conducted RF immunity:
    10V rms with 1 kHz sine-wave 80% AM from 150 kHz...80 MHz
  • Operating temperature:
    0 °C <60 °C (32 °F <140 °F)
  • Radiated RF immunity:
    10 V/m with 1 kHz sine-wave 80% AM from 80...2000 MHz, 10 V/m with 200 Hz 50% Pulse 100% AM @ 900 MHz, 10 V/m with 200 Hz 50% Pulse 100% AM @ 1890 MHz, 3 V/m with 1 kHz sine-wave 80% AM from 2000...2700 MHz
  • North American temperature code:
    T4A
  • IECEx temperature code:
    T4
  • Module location:
    Chassis based, any slot
  • Weight:
    0.45 kg
  • Estimated shipping dimensions:
    23.3x18.2x5.3cm
  • Tariff Code:
    8708709900
  • 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 Compatibility Use Cases Diagnostics

Features:

  • Fiber optic EtherNet/IP communication ensures high resistance to electrical noise in industrial environments
  • Supports multiple CIP and TCP connections for flexible and scalable network communication
  • Chassis-based ControlLogix integration allows easy system expansion and modular installation
Allen-Bradley 1756-EN2F is designed for industrial automation systems requiring reliable fiber-based Ethernet communication. It integrates into ControlLogix platforms and supports EtherNet/IP protocol for real-time data exchange. The use of multimode fiber enhances communication stability in electrically noisy environments. Industrial control systems benefit from its high connection capacity and flexible network architecture. This module is widely used in process control and factory automation systems where communication reliability is critical.

The 1756-EN2F supports efficient network structuring through multiple CIP and TCP connection capabilities. It allows seamless communication between controllers, I/O systems, and supervisory platforms. Fiber optic transmission reduces signal degradation over distance, improving overall system integrity. Its chassis-based design simplifies installation in modular automation cabinets. The module contributes to improved system uptime in demanding industrial operations.

In industrial environments, the 1756-EN2F plays a key role in enabling high-speed data exchange across EtherNet/IP networks. It supports integration with modern control software environments such as Studio 5000. Its robust electrical isolation and environmental tolerance ensure stable operation under harsh conditions. The module is suitable for continuous industrial processes requiring uninterrupted communication. It provides a reliable foundation for scalable and future-ready automation systems.

The 1756-EN2F Allen-Bradley CLX ENet/IP 100M Fiber Communication Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1756-EN2F CLX ENet/IP 100M Fiber Communication Module Manuals,Datasheets,Link 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-EN2F CLX ENet/IP 100M Fiber Communication Module Specs

General

  • Manufacturer Allen-Bradley
  • Model 1756-EN2F
  • Condition New Original ready stock
  • Product Family 1756-EN2FK,1756-EN2T,1756-EN2TP
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.
  • Unified Industrial Protocol: Employs the standard CIP application layer protocol, achieving seamless interoperability with ControlNet and DeviceNet networks.
  • Standard Fiber Optic Interface: Supports standard 100BASE-FX fiber optic media, compatible with common multimode fiber optic network topologies.
  • Software Environment Integration: Perfectly compatible with RSLogix 5000 or Studio 5000 environments, supporting standard AOP module configuration files.
  • Hybrid Rack Interoperability: Enables backplane data exchange with multiple network modules of different generations within the same ControlLogix rack.
  • Long-distance Remote I/O Communication: Utilizing the inherent anti-interference properties of fiber optics, reliably connects local controllers to remote I/O racks several kilometers away.
  • Networking in High-Electromagnetic-Interference Environments: Replaces traditional copper cables in harsh environments such as metallurgy and substations where high-frequency inverter interference exists.
  • High-Capacity Interconnection of Plant Backbone Networks: Serves as the backbone network gateway for workshop control layers, handling high-speed peer-to-peer transmission of production data between controllers.
  • Centralized Factory SCADA Access: In large-scale distributed control systems, securely connects physically distributed control racks to the core HMI and the host computer monitoring network.
  • LED Status Indicators: Real-time display of link status, network activity, and module health via front-mounted indicator lights.
  • Web-based Diagnostics: The module has a built-in embedded web server, allowing users to view network statistics and packet loss rates via a browser without dedicated software.
  • Connectivity Monitoring: Supports intuitive viewing of the activation and disconnection status of current TCP and CIP connections within the Logix fault diagnosis tree.
  • Loop Fault Location: Works with industrial switches to quickly detect physical connectivity issues in fiber optic links, enabling precise location of faulty nodes.
Description
Allen-Bradley 1756-EN2F is a ControlLogix communication module built for EtherNet/IP networks using fiber optic transmission. It operates with a single multimode LC fiber interface supporting 10/100 Mbps communication rates, ensuring reliable high-speed industrial data exchange. The module is designed for chassis-based installation and fits any available slot within a ControlLogix system. Its open-style enclosure supports flexible integration in industrial control environments.

The 1756-EN2F is engineered to handle up to 128 CIP unconnected messages on the backplane and 128 on Ethernet, supporting scalable network communication structures. It provides up to 128 TCP connections and 256 CIP connections for flexible control and messaging operations. With 1.2A current draw at 5.1V DC and 6.2W power dissipation, the module is optimized for efficient system energy usage. Fiber multimode LC connectivity ensures resistance to electromagnetic interference in demanding industrial settings.

Designed for industrial reliability, the 1756-EN2F supports strong environmental resistance, including operating temperatures from 0°C to 60°C and storage conditions down to -40°C. It complies with CISPR 11 Class A emissions standards and provides immunity to vibration, shock, and RF interference. The module offers 30V continuous isolation voltage and tested dielectric strength for safe operation in control system environments. These features make it suitable for harsh industrial automation applications requiring stable communication.

Installation of the 1756-EN2F is straightforward within a ControlLogix chassis system. Network configuration can be completed using rotary switches, BOOTP/DHCP servers, RSLinx Classic software, or Studio 5000 environment tools. Once installed, the module connects directly to EtherNet/IP networks via multimode fiber cable with LC connectors. This structure supports efficient deployment in distributed control systems and ensures fast commissioning in industrial Ethernet architectures.
Revisions

Revision Part #

Also known as

1756-EN2F Ser A
1756-EN2F/A, Series A, Rev A
1756-EN2F Ser B
1756-EN2F/B, Series B, Rev B
1756-EN2F Ser C
1756-EN2F/C, Series C, Rev C
Alternative Names
1756EN2F I756-EN2F I756EN2F 1756-EN2FK 1756-EN2TK 1756-EN2TPK 1756-EN2TRK 1756-EN3TRK 1756-EN4TRK 1756-ENBTK 1756-EWEBK 1756-EN2T
Technical notes
The Allen-Bradley 1756-EN2F is a high-performance ControlLogix communication module that provides a dedicated 100 Mbps fiber-optic interface to support up to 256 CIP connections for immune-to-interference industrial networking.
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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 communication capability does Allen-Bradley 1756-EN2F provide in EtherNet/IP systems?
Allen-Bradley 1756-EN2F supports EtherNet/IP communication using multimode fiber with 10/100 Mbps data rate for industrial control networks.
Why does Allen-Bradley 1756-EN2F use fiber optic interface for industrial networking?
Allen-Bradley 1756-EN2F uses fiber optic LC interface to reduce electromagnetic interference and improve signal stability in harsh environments.
How does Allen-Bradley 1756-EN2F support network connection scalability?
Allen-Bradley 1756-EN2F supports up to 128 TCP connections and 256 CIP connections for flexible industrial network expansion.
What communication structure is supported by Allen-Bradley 1756-EN2F within ControlLogix architecture?
Allen-Bradley 1756-EN2F supports CIP messaging and EtherNet/IP networking for integration within ControlLogix modular control systems.

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