1756-ENET | Allen-Bradley ControlLogix Ethernet Communication Module (10-BaseT, AUI)
1756-ENET | Allen-Bradley ControlLogix Ethernet Communication Module (10-BaseT, AUI)
1756-ENET | Allen-Bradley ControlLogix Ethernet Communication Module (10-BaseT, AUI)
    1756-ENET | Allen-Bradley ControlLogix Ethernet Communication Module (10-BaseT, AUI)
1756-ENET | Allen-Bradley ControlLogix Ethernet Communication Module (10-BaseT, AUI)

1756-ENET | Allen-Bradley ControlLogix Ethernet Communication Module (10-BaseT, AUI)

Part #: 1756-ENET Manufactured by: Allen-Bradley
$745.00
$745.00
5 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
Allen Bradley ControlLogix Ethernet Communication Module with Chassis (any slot) Location
We accept:
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Do you need help?

Call our Sales Manager
phone
+1 (828) 222-3490
Mon./Sat.: 7:00AM - 8:00PM
Write to us now
email
sales@iqelectro.com
Mon./Sat.: 7:00AM - 12:00PM
warranty
IQElectro 2-Year Warranty
Warranty for Product #: 1756-ENET
IQElectro offers a free 2-year warranty on all products. You can trust that every purchase is a reliable investment in the future of your company. Warranty Terms
2-3 Day Free Shipping
Packed Ready to Ship
24/7 Expert Support
Return within 30-Days
IQElectro is Not an authorized distributor for Allen-Bradley
Original Manufacturer's Warranty Not Covered, This Product is SURPLUS.

Product Description P/N: 1756-ENET

Description / Specifications

Description

The Allen-Bradley 1756-ENET is a ControlLogix Ethernet communication module engineered to provide reliable EtherNet/IP connectivity for distributed I/O, message exchange, and general industrial communication tasks. Featuring a 10-BaseT Ethernet port and an AUI connector, the module supports scanner and adapter operation, enabling efficient real-time data exchange across a ControlLogix system.

 

 

Technical Specifications

Condition New / Never Used Surplus
Brand Allen-Bradley
Series ControlLogix
Part Number 1756-ENET
Manufacturer Rockwell Automation
Product Type Ethernet Communication Module
Module Function Ethernet/IP messaging & I/O (Scanner / Adapter)
Communication Ports (1) 10-BaseT Ethernet, (1) AUI
Ethernet Speed 10 Mbps
Supported Topology Linear
Module Slot Width 1 slot
Installation Location Any slot in ControlLogix chassis
Compatible Chassis 1756-A4, A7, A10, A13 (Series A/B)
Compatible Power Supplies 1756-PA72, 1756-PB72
Backplane Current (5.1V) 900 mA
Backplane Current (24V) 350 mA
Power Dissipation (Max) 13.3 W
Operating Temperature 0–60 °C (32–140 °F)
Indicators OK, TXD, RXD
Supported Functions Messaging, distributed I/O, CIP communications
Enclosure Type Open-style

 

 

Information About 1756-ENET

The 1756-ENET is one of the early-generation Ethernet interface modules for the ControlLogix platform. Designed to integrate seamlessly into a Logix-based architecture, this module enables both explicit messaging and I/O communications using Ethernet/IP and CIP (Common Industrial Protocol). Its ability to function as either a scanner or an adapter makes it suitable for small to medium distributed I/O systems.

The module features a single-slot design and installs in any available position within a compatible ControlLogix chassis. It provides a 10 Mbps Ethernet interface for device-to-controller communication and includes an AUI port for legacy network configurations or module maintenance. Equipped with front-panel LED indicators (OK, TXD, RXD), the 1756-ENET simplifies diagnostics during installation and operation.

Though now officially discontinued, the 1756-ENET remains widely used in existing automation systems and can be replaced with newer modules such as the 1756-ENBT or 1756-EN2T for enhanced speed and performance.

Key Features

  • EtherNet/IP connectivity: Supports 10-BaseT communications for messaging and distributed I/O.
  • Scanner & adapter operation: Allows flexible network roles depending on application needs.
  • Front-panel diagnostics: TXD, RXD, and OK LEDs provide quick activity and health monitoring.
  • CIP protocol support: Ensures compatibility with multiple industrial communication layers.
  • Easy system integration: Installs in any slot of compatible ControlLogix chassis.
  • Legacy AUI interface: Offers optional physical media connection for older Ethernet hardware.
  • Compatible with Series A/B chassis: Including 1756-A4, A7, A10, and A13.

The 1756-ENET remains a dependable Ethernet interface for legacy ControlLogix installations requiring stable 10 Mbps communication.

Frequently Asked Questions about 1756-ENET
Question: What is the primary purpose of the 1756-ENET module?
Date Update:06/06/2025
Answer:

The 1756-ENET is an EtherNet/IP communication module designed for the ControlLogix platform. Its primary purpose is to enable real-time I/O messaging, general messaging, and CIP-based communication over Ethernet networks. It supports both scanner and adapter modes, facilitating distributed control systems. It allows integration of multiple devices and controllers in industrial Ethernet architectures. It is ideal for applications requiring fast and deterministic communication.

Question: What communication ports are available on the 1756-ENET module?
Date Update:06/06/2025
Answer:

The module provides one RJ-45 port for 10Base-T Ethernet communication and one AUI port for optional maintenance and diagnostics. The RJ-45 port uses unshielded Cat5 twisted-pair cabling. It supports 10 Mbps data transfer, suitable for small to medium-sized systems. The AUI connector offers flexibility for legacy configurations. Physical media must meet standard Ethernet specifications.

Question: Which topologies are supported by the 1756-ENET?
Date Update:06/06/2025
Answer:

The module supports linear topology, which is simple to implement in basic Ethernet layouts. While it lacks support for advanced features like Device Level Ring (DLR), it provides a reliable backbone for point-to-point and daisy-chained devices. For more advanced redundancy, users should upgrade to EN2T or ENBT models. It does not require scheduled configuration or routing tables.

Question: Does the 1756-ENET support CIP Safety or Secure Communication?
Date Update:06/06/2025
Answer:

While the module was one of the earliest to align with CIP safety standards, it does not support secure communication protocols like CIP Security or encryption. It can handle simultaneous transfer of safety and control data in non-secure networks. For modern cybersecurity compliance, newer modules like 1756-EN2T are recommended. Explicit Protected Mode is supported to limit access to configuration.

Question: Is the 1756-ENET module still being manufactured?
Date Update:06/06/2025
Answer:

No, the 1756-ENET was officially discontinued in December 2020 by Rockwell Automation. It has been replaced by the newer 1756-ENBT and 1756-EN2T models with enhanced functionality and faster speeds. While legacy stock may still be available through some suppliers, users are encouraged to migrate to supported models. The replacement modules offer improved diagnostics, redundancy support, and higher bandwidth. Always consult the official lifecycle status before deploying.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description

The Allen-Bradley 1756-ENET is a ControlLogix Ethernet communication module engineered to provide reliable EtherNet/IP connectivity for distributed I/O, message exchange, and general industrial communication tasks. Featuring a 10-BaseT Ethernet port and an AUI connector, the module supports scanner and adapter operation, enabling efficient real-time data exchange across a ControlLogix system.

 

 

Technical Specifications

Condition New / Never Used Surplus
Brand Allen-Bradley
Series ControlLogix
Part Number 1756-ENET
Manufacturer Rockwell Automation
Product Type Ethernet Communication Module
Module Function Ethernet/IP messaging & I/O (Scanner / Adapter)
Communication Ports (1) 10-BaseT Ethernet, (1) AUI
Ethernet Speed 10 Mbps
Supported Topology Linear
Module Slot Width 1 slot
Installation Location Any slot in ControlLogix chassis
Compatible Chassis 1756-A4, A7, A10, A13 (Series A/B)
Compatible Power Supplies 1756-PA72, 1756-PB72
Backplane Current (5.1V) 900 mA
Backplane Current (24V) 350 mA
Power Dissipation (Max) 13.3 W
Operating Temperature 0–60 °C (32–140 °F)
Indicators OK, TXD, RXD
Supported Functions Messaging, distributed I/O, CIP communications
Enclosure Type Open-style

 

 

Information About 1756-ENET

The 1756-ENET is one of the early-generation Ethernet interface modules for the ControlLogix platform. Designed to integrate seamlessly into a Logix-based architecture, this module enables both explicit messaging and I/O communications using Ethernet/IP and CIP (Common Industrial Protocol). Its ability to function as either a scanner or an adapter makes it suitable for small to medium distributed I/O systems.

The module features a single-slot design and installs in any available position within a compatible ControlLogix chassis. It provides a 10 Mbps Ethernet interface for device-to-controller communication and includes an AUI port for legacy network configurations or module maintenance. Equipped with front-panel LED indicators (OK, TXD, RXD), the 1756-ENET simplifies diagnostics during installation and operation.

Though now officially discontinued, the 1756-ENET remains widely used in existing automation systems and can be replaced with newer modules such as the 1756-ENBT or 1756-EN2T for enhanced speed and performance.

Key Features

  • EtherNet/IP connectivity: Supports 10-BaseT communications for messaging and distributed I/O.
  • Scanner & adapter operation: Allows flexible network roles depending on application needs.
  • Front-panel diagnostics: TXD, RXD, and OK LEDs provide quick activity and health monitoring.
  • CIP protocol support: Ensures compatibility with multiple industrial communication layers.
  • Easy system integration: Installs in any slot of compatible ControlLogix chassis.
  • Legacy AUI interface: Offers optional physical media connection for older Ethernet hardware.
  • Compatible with Series A/B chassis: Including 1756-A4, A7, A10, and A13.

The 1756-ENET remains a dependable Ethernet interface for legacy ControlLogix installations requiring stable 10 Mbps communication.

Check Out These Related Products