1756-ENET | Allen-Bradley ControlLogix EtherNet/IP Bridge Module, Twisted Pair
1756-ENET | Allen-Bradley ControlLogix EtherNet/IP Bridge Module, Twisted Pair
1756-ENET | Allen-Bradley ControlLogix EtherNet/IP Bridge Module, Twisted Pair
    1756-ENET | Allen-Bradley ControlLogix EtherNet/IP Bridge Module, Twisted Pair
1756-ENET | Allen-Bradley ControlLogix EtherNet/IP Bridge Module, Twisted Pair

1756-ENET | Allen-Bradley ControlLogix EtherNet/IP Bridge Module, Twisted Pair

Part #: 1756-ENET Manufactured by: Allen-Bradley
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$882.00
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$882.00
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Condition: New-Surplus Original Box
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Product Overview
Allen Bradley ControlLogix Ethernet Communication Module with Chassis (any slot) Location
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Product Description P/N: 1756-ENET

Description / Specifications

Description 

The 1756-ENET is a ControlLogix Ethernet communication module from Allen-Bradley. This module is part of the ControlLogix platform which supports a variety of functions such as scanner and adapter mode for control of realtime I/O data, optimized messaging as well as Common Industrial Protocol (CIP). This module has one (1) 10-BaseT Ethernet interface and one (1) AUI Ethernet connector. This module is compatible for use with 1756-A4, -A7, -A10, -A13 Series A or Series B Chassis. It is also compatible with 1756-PA72 and 1756-PB72 power supplies.

 

Technical Specifications 

Brand Allen-Bradley
Series ControlLogix
Part Number 1756-ENET
Manufacturer Rockwell Automation
Backplane current consumption 350 mA
Module LEDs TXD; RXD; OK
Compatible Power Supply 1756-PA72 and 1756-PB72
Compatible Chassis Series A and B: 1756-A4, -A7, -A10, -A13 Chassis
Supported functions Scanner / Adapter; Messaging
Supported topologies Linear
Ethernet Data Transfer speed 10 Mbps
Communication Port One (1) Ethernet; One (1) AUI Port
Slot Width 1-slot
Module Type Ethernet Communication Module
Location Chassis (any slot)
Backplane Current (5.1 Volts DC) 900 milliamps
Backplane Current (24 Volts DC) 350 milliamps
Power Dissipation (Max) 13.3 Watts
Operating Temperature 32-140 Fahrenheit (0-60 Celsius)
Enclosure Open

  

 

Information About 1756-ENET

The Allen-Bradley 1756-ENET is a ControlLogix communication module. It is an EtherNet/IP (Ethernet Industrial Protocol) interface communication module. It has been discontinued by the company and replaced with new model number 1756-ENBT with the same specification. It supports general messaging, real-time I/O messaging, and the information exchange for applications like real-time control, time synchronization, and motion. The 1756-ENET also meats the CIP safety standard by allowing simultaneous transfer of safety and control data and diagnostics information. It uses advanced communication chips and physical media. The 1756-ENET Module has 100 Mbps EtherNet/IP communication rates and uses copper wire. It supports 128 Logix and 64 TCP/IP communication connections. It can support a maximum of 8 axes for integrated motion on the Ethernet/IP Network. It draws a 700 mA current at 5.1V DC and 3 mA at 24V DC. It has a maximum power dissipation of 3.7 W and thermal dissipation of 12.6 BTU/hr. It can be installed in any slot in the ControlLogix Chassis. For wiring, it uses unshielded RJ45, category 5, twisted-pair cable connectors to interface with the controller. To operate an EtherNet/IP network, parameters such as IP address, Subnet mask, Gateway etc., must be defined. The 1756-ENET bridge has various functions like providing support for messaging, distributed I/O, and tags. It encapsulates messages within standard TCP/IP protocol. ControlNet and DeviceNet network protocols allow it to share a common application layer. It does not require any scheduling or routing table to store information. Other features include explicit protected mode, electronic keying, device level ring network, and parallel redundancy protocol network support.

The 1756-ENET is an Ethernet communication interface from Allen-Bradley. This module is part of the ControlLogix platform. It is one of the first generation ControlLogix modules that is declared discontinued by the manufacturer in December 2020. This module comes with one (1) RJ-45 interface that supports Ethernet protocol and one (1) AUI port used for module maintenance and localized configuration.

The 1756-ENET is a single slot module therefore it occupies a single slot of the chassis. It is compatible for installation in Series A and Series B ControlLogix chassis particularly 1756-A4, -A7, -A10, -A13 as well as Series A and Series B power supplies such as 1756-PA72 and 1756-PB72 power supply.

The 1756-ENET may be configured to act as a scanner or adapter module. It may be used in Ethernet based distributed I/O configuration, allowing real-time control of I/O data. It also supports optimized rack configuration as well as perform I/O messaging. It is also compatible with Common Industrial Protocol (CIP) system protocol.

It also has front panel LED indicators such as RXD and TXD LED , intended for monitoring of received and transmitted data and a module OK LED for monitoring of the overall status of the module. The module’s MAC address is printed on the module’s front panel which may be viewed by flipping the module swing door.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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.
QElectro 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 1756-ENET is a ControlLogix Ethernet communication module from Allen-Bradley. This module is part of the ControlLogix platform which supports a variety of functions such as scanner and adapter mode for control of realtime I/O data, optimized messaging as well as Common Industrial Protocol (CIP). This module has one (1) 10-BaseT Ethernet interface and one (1) AUI Ethernet connector. This module is compatible for use with 1756-A4, -A7, -A10, -A13 Series A or Series B Chassis. It is also compatible with 1756-PA72 and 1756-PB72 power supplies.

 

Technical Specifications 

Brand Allen-Bradley
Series ControlLogix
Part Number 1756-ENET
Manufacturer Rockwell Automation
Backplane current consumption 350 mA
Module LEDs TXD; RXD; OK
Compatible Power Supply 1756-PA72 and 1756-PB72
Compatible Chassis Series A and B: 1756-A4, -A7, -A10, -A13 Chassis
Supported functions Scanner / Adapter; Messaging
Supported topologies Linear
Ethernet Data Transfer speed 10 Mbps
Communication Port One (1) Ethernet; One (1) AUI Port
Slot Width 1-slot
Module Type Ethernet Communication Module
Location Chassis (any slot)
Backplane Current (5.1 Volts DC) 900 milliamps
Backplane Current (24 Volts DC) 350 milliamps
Power Dissipation (Max) 13.3 Watts
Operating Temperature 32-140 Fahrenheit (0-60 Celsius)
Enclosure Open

  

 

Information About 1756-ENET

The Allen-Bradley 1756-ENET is a ControlLogix communication module. It is an EtherNet/IP (Ethernet Industrial Protocol) interface communication module. It has been discontinued by the company and replaced with new model number 1756-ENBT with the same specification. It supports general messaging, real-time I/O messaging, and the information exchange for applications like real-time control, time synchronization, and motion. The 1756-ENET also meats the CIP safety standard by allowing simultaneous transfer of safety and control data and diagnostics information. It uses advanced communication chips and physical media. The 1756-ENET Module has 100 Mbps EtherNet/IP communication rates and uses copper wire. It supports 128 Logix and 64 TCP/IP communication connections. It can support a maximum of 8 axes for integrated motion on the Ethernet/IP Network. It draws a 700 mA current at 5.1V DC and 3 mA at 24V DC. It has a maximum power dissipation of 3.7 W and thermal dissipation of 12.6 BTU/hr. It can be installed in any slot in the ControlLogix Chassis. For wiring, it uses unshielded RJ45, category 5, twisted-pair cable connectors to interface with the controller. To operate an EtherNet/IP network, parameters such as IP address, Subnet mask, Gateway etc., must be defined. The 1756-ENET bridge has various functions like providing support for messaging, distributed I/O, and tags. It encapsulates messages within standard TCP/IP protocol. ControlNet and DeviceNet network protocols allow it to share a common application layer. It does not require any scheduling or routing table to store information. Other features include explicit protected mode, electronic keying, device level ring network, and parallel redundancy protocol network support.

The 1756-ENET is an Ethernet communication interface from Allen-Bradley. This module is part of the ControlLogix platform. It is one of the first generation ControlLogix modules that is declared discontinued by the manufacturer in December 2020. This module comes with one (1) RJ-45 interface that supports Ethernet protocol and one (1) AUI port used for module maintenance and localized configuration.

The 1756-ENET is a single slot module therefore it occupies a single slot of the chassis. It is compatible for installation in Series A and Series B ControlLogix chassis particularly 1756-A4, -A7, -A10, -A13 as well as Series A and Series B power supplies such as 1756-PA72 and 1756-PB72 power supply.

The 1756-ENET may be configured to act as a scanner or adapter module. It may be used in Ethernet based distributed I/O configuration, allowing real-time control of I/O data. It also supports optimized rack configuration as well as perform I/O messaging. It is also compatible with Common Industrial Protocol (CIP) system protocol.

It also has front panel LED indicators such as RXD and TXD LED , intended for monitoring of received and transmitted data and a module OK LED for monitoring of the overall status of the module. The module’s MAC address is printed on the module’s front panel which may be viewed by flipping the module swing door.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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