1756-L84E | Allen-Bradley ControlLogix Logix5580 Processor, 20MB, USB/EtherNet
1756-L84E | Allen-Bradley ControlLogix Logix5580 Processor, 20MB, USB/EtherNet
1756-L84E | Allen-Bradley ControlLogix Logix5580 Processor, 20MB, USB/EtherNet
    1756-L84E | Allen-Bradley ControlLogix Logix5580 Processor, 20MB, USB/EtherNet
1756-L84E | Allen-Bradley ControlLogix Logix5580 Processor, 20MB, USB/EtherNet

1756-L84E | Allen-Bradley ControlLogix Logix5580 Processor, 20MB, USB/EtherNet

Part #: 1756-L84E Manufactured by: Allen-Bradley
Regular price
$6,285.00
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$6,285.00
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Condition: New-Surplus Original Box
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Product Overview
The Allen-Bradley ControlLogix 1756-L84E is a ControlLogix Controller with N/A I-O Memory, 20 MB User Memory, 128000 Maxim...  Read more
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Product Description P/N: 1756-L84E

Description / Specifications

Description 

The Allen-Bradley 1756-L84E is a ControlLogix controller. It is part of the Programmable Automation Controller (PAC) family which features a user memory of 20MB with integrated One (1) Ethernet and One (1) USB communication ports. It is capable of interfacing 128,000 Discrete I/O and 4000 Analog I/O memory.

 

Technical Specifications 

Brand Allen-Bradley
Series ControlLogix
Part Number 1756-L84E
Manufacturer Rockwell Automation
Module Type ControlLogix Controller
Redundant Power Supply 1756-PA75R, 1756-PA75RK, 1756-PB75R, 1756-PB75RK, 1756-PSCA2, 1756-PSCA2K
Standard Power Supply 1756-PA50, 1756-PA72, 1756-PA72K, 1756-PA75, 1756-PA75K, 1756-PB50, 1756-PB72, 1756-PB72K, 1756-PB75, 1756-PB75K, 1756-PH75, 1756-PC75
Chassis 1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K,1756-A17, 1756-A17 K Series B, Series C
Communication interfaces One (1) Ethernet; One (1) USB
Enclosure None (Open-Style)
Isolation Voltage 50 Volts Continuous
User Memory 20 MB
Current Draw (1.2 Volts DC) 5.0 Miliamperes
Current Draw (5.1 Volts) 1.20 Miliamperes
Power Dissipation 6.2 Watts
Maximum I-O 128,000
Maximum Analog I-O 4,000
Maximum Digital I-O 128,000
Thermal Dissipation 21.2 BTU per hour

  

 

Information About 1756-L84E

The Allen-Bradley 1756-L84E is a ControlLogix controller. This controller belongs to the high-end controller with modern design and connectivity. This controller is ideally used for large applications as it can be used to interface and control Input and output devices, specifically, 128,000 Discrete Input and Outputs and 4000 Analog Inputs and Outputs.

It supports local I/O control as well as implementation of distributed I/O architecture utilizing one or more communication protocols such as EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O, SynchLink, and Third-party process and device networks

The 1756-L84E comes with integrated communication port such as One (1) Ethernet I/P. This embedded port supports 10/100/1000 Mbps transmission speed and may be used to communicate with Human Machine Interface (HMI), Supervisory Control and Data Acquisition (SCADA) and other controllers through messaging instructions within the same Ethernet network. The USB port is a USB 2.0 that supports 12 Mbps communication speed.

The 1756-L84E has a built-in user memory amounting to 20MB. An expansion non-volatile memory may be installed with the use of 1784-SD2 which is a 2GB Secure Digital (SD) card. This controller does not require a battery to retain the contents of the volatile memory as it comes with the modern energy storage solution, eliminating the need for use of batteries, making the controller user and environmentally friendly.

The 1756-L84E ControlLogix 5580 Controller by Allen-Bradley is a high-performance controller with up to 128,000 I/O which enhance machine automation and increase performance. It comes with 20MB of user program storage memory and allows for expanded and long-term program storage via the optional pre-installed 2 GB Secure Digital Card (1784-SD2). Embedded on the controller is an energy storage module which removes the need for an extra battery and the entire controller draws a backplane current of 5mA at 1.2V DC and of 1.2mA at 5.1V DC. The 1756-L84E has an operational thermal dissipation of 21.2 BTU/hr, and provides 50V isolation between USB port-to-backplane, Ethernet port-to-backplane, and USB port-to-Ethernet port, utilizing basic insulation tested at 1000V AC for 1 minute.

The controller fits into any 1756 Chassis slot and uses a single slot width. The number of tasks performed by the controller is unlimited through the local I/O event triggers mechanism and programming are achieved using the Studio 5000 Logix Designer Application Version 3.0 or greater. It also has a built-in embedded 1 GB Ethernet port which supports a maximum of 250 nodes and provides enhanced performance, wider communication, and integrated motion control on the EtherNet/IP network. The controller is designated the T4 temperature code and is IEC tested to operates at 0-60 deg. Celcius temperature range, and functions without de-rating at 5-95% non-condensing relative humidity limits. The 1756-L84E can withstand a shock of 30G and a vibration of 2G and the entire controller weighs approximately 0.394kg.



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-L84E
Question: What is the main function of the 1756-L84E controller?
Date Update:05/06/2025
Answer:

The 1756-L84E is a high-performance Programmable Automation Controller (PAC) from the ControlLogix 5580 family. Its primary role is to execute control programs and manage complex automation tasks in large-scale industrial systems. It can handle up to 128,000 discrete and 4,000 analog I/O points, making it ideal for advanced machine or process control. The controller supports real-time processing, motion, and safety features. It integrates seamlessly with distributed and local I/O over EtherNet/IP and other industrial networks.

Question: How much user memory is available in the 1756-L84E controller?
Date Update:05/06/2025
Answer:

The 1756-L84E controller includes 20 MB of user memory for logic and data. This large memory capacity allows for the development of complex control applications with many routines, variables, and motion profiles. For expanded storage, it supports a 2 GB SD card (part number 1784-SD2) for non-volatile data and firmware. The SD card also allows storage of diagnostic logs and application backups. This helps ensure system recovery in the event of failure.

Question: Is a battery required for the 1756-L84E controller?
Date Update:05/06/2025
Answer:

No, the 1756-L84E does not require a battery to retain memory. It uses an integrated energy storage module to preserve program and data in case of power loss. This modern solution reduces maintenance and eliminates concerns over battery degradation or replacement. The storage is also safer and more environmentally friendly. It simplifies long-term operation in unattended systems.

Question: What power supplies are compatible with the 1756-L84E?
Date Update:05/06/2025
Answer:

The 1756-L84E is compatible with both standard and redundant ControlLogix power supplies. These include models such as 1756-PA72, 1756-PA75, 1756-PB75, and their redundant counterparts like 1756-PA75R and 1756-PSCA2. Power must be delivered through the backplane in the ControlLogix chassis. The controller draws 5 mA at 1.2 VDC and 1.2 A at 5.1 VDC, with 6.2 Watts power dissipation. Proper power planning ensures stable controller performance.

Question: Is the 1756-L84E still being manufactured and supported?
Date Update:05/06/2025
Answer:

Yes, the 1756-L84E is an active product in Rockwell Automation’s ControlLogix portfolio. It is fully supported with firmware updates, accessories, and technical documentation. This controller is recommended for new designs where high performance and large memory are required. Rockwell also offers lifecycle planning and migration tools. Therefore, the 1756-L84E is a future-ready choice for demanding automation systems.

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 Allen-Bradley 1756-L84E is a ControlLogix controller. It is part of the Programmable Automation Controller (PAC) family which features a user memory of 20MB with integrated One (1) Ethernet and One (1) USB communication ports. It is capable of interfacing 128,000 Discrete I/O and 4000 Analog I/O memory.

 

Technical Specifications 

Brand Allen-Bradley
Series ControlLogix
Part Number 1756-L84E
Manufacturer Rockwell Automation
Module Type ControlLogix Controller
Redundant Power Supply 1756-PA75R, 1756-PA75RK, 1756-PB75R, 1756-PB75RK, 1756-PSCA2, 1756-PSCA2K
Standard Power Supply 1756-PA50, 1756-PA72, 1756-PA72K, 1756-PA75, 1756-PA75K, 1756-PB50, 1756-PB72, 1756-PB72K, 1756-PB75, 1756-PB75K, 1756-PH75, 1756-PC75
Chassis 1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K,1756-A17, 1756-A17 K Series B, Series C
Communication interfaces One (1) Ethernet; One (1) USB
Enclosure None (Open-Style)
Isolation Voltage 50 Volts Continuous
User Memory 20 MB
Current Draw (1.2 Volts DC) 5.0 Miliamperes
Current Draw (5.1 Volts) 1.20 Miliamperes
Power Dissipation 6.2 Watts
Maximum I-O 128,000
Maximum Analog I-O 4,000
Maximum Digital I-O 128,000
Thermal Dissipation 21.2 BTU per hour

  

 

Information About 1756-L84E

The Allen-Bradley 1756-L84E is a ControlLogix controller. This controller belongs to the high-end controller with modern design and connectivity. This controller is ideally used for large applications as it can be used to interface and control Input and output devices, specifically, 128,000 Discrete Input and Outputs and 4000 Analog Inputs and Outputs.

It supports local I/O control as well as implementation of distributed I/O architecture utilizing one or more communication protocols such as EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O, SynchLink, and Third-party process and device networks

The 1756-L84E comes with integrated communication port such as One (1) Ethernet I/P. This embedded port supports 10/100/1000 Mbps transmission speed and may be used to communicate with Human Machine Interface (HMI), Supervisory Control and Data Acquisition (SCADA) and other controllers through messaging instructions within the same Ethernet network. The USB port is a USB 2.0 that supports 12 Mbps communication speed.

The 1756-L84E has a built-in user memory amounting to 20MB. An expansion non-volatile memory may be installed with the use of 1784-SD2 which is a 2GB Secure Digital (SD) card. This controller does not require a battery to retain the contents of the volatile memory as it comes with the modern energy storage solution, eliminating the need for use of batteries, making the controller user and environmentally friendly.

The 1756-L84E ControlLogix 5580 Controller by Allen-Bradley is a high-performance controller with up to 128,000 I/O which enhance machine automation and increase performance. It comes with 20MB of user program storage memory and allows for expanded and long-term program storage via the optional pre-installed 2 GB Secure Digital Card (1784-SD2). Embedded on the controller is an energy storage module which removes the need for an extra battery and the entire controller draws a backplane current of 5mA at 1.2V DC and of 1.2mA at 5.1V DC. The 1756-L84E has an operational thermal dissipation of 21.2 BTU/hr, and provides 50V isolation between USB port-to-backplane, Ethernet port-to-backplane, and USB port-to-Ethernet port, utilizing basic insulation tested at 1000V AC for 1 minute.

The controller fits into any 1756 Chassis slot and uses a single slot width. The number of tasks performed by the controller is unlimited through the local I/O event triggers mechanism and programming are achieved using the Studio 5000 Logix Designer Application Version 3.0 or greater. It also has a built-in embedded 1 GB Ethernet port which supports a maximum of 250 nodes and provides enhanced performance, wider communication, and integrated motion control on the EtherNet/IP network. The controller is designated the T4 temperature code and is IEC tested to operates at 0-60 deg. Celcius temperature range, and functions without de-rating at 5-95% non-condensing relative humidity limits. The 1756-L84E can withstand a shock of 30G and a vibration of 2G and the entire controller weighs approximately 0.394kg.



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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