1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
    1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
    1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
    1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory
1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory

1756-L73 | Allen-Bradley ControlLogix Logix5673 Processor with 8 Mbytes Memory

Part #: 1756-L73 Manufactured by: Allen-Bradley
Regular price
$2,037.00
Sale price
$2,037.00
Regular price
9 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
The Allen-Bradley 1756-L73 is a ControlLogix controller. It is part of the Programmable Automation Controller (PAC) family...  Read more
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warranty
IQElectro 2-Year Warranty
Warranty for Product #: 1756-L73
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Original Manufacturer's Warranty Not Covered, This Product is SURPLUS.

Product Description P/N: 1756-L73

Description / Specifications

Description 

The Allen-Bradley 1756-L73 is a ControlLogix controller featuring 8 MB of user memory and advanced processing capability for large automation systems. It supports up to 500 controller connections and includes a digital alphanumeric display for status and diagnostics.

 

 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category Controllers
Part Number 1756-L73
Subcategory ControlLogix Controllers
Controller Type Logix5573
User Memory 8 MB
I/O Memory 0.98 MB
Controller Connections Up to 500
Display Type 4-Character Digital Alphanumeric
USB Port Yes
Mounting Type Chassis
Operating Temperature 0–60 °C
Power Requirements 5 mA @ 1.2 VDC, 800 mA @ 5.1 VDC
Certifications CE, CUL, GOST, KC, Marine, RCM, UL
Enclosure None (open-style)
Application ControlLogix Automation and Process Control
Weight 0.66 lb

  

 

Information About 1756-L73

The 1756-L73 is part of the Logix5573 controller family and provides 8 MB of user memory along with 0.98 MB of I/O memory for handling extensive program logic, motion control, and distributed I/O operations. It supports up to 500 controller connections and includes a USB communication port for direct programming and diagnostics. The module mounts in a ControlLogix chassis, operates from 0 to 60 °C, and requires 5 mA at 1.2 VDC and 800 mA at 5.1 VDC for its power needs. Designed with an open-style enclosure and certified to global standards including UL, CE, CUL, KC, Marine, RCM, and GOST, the 1756-L73 offers reliable processing for demanding industrial automation environments.

Key Features:

  • 8 MB User Memory: Provides large program capacity for complex automation, motion, and process applications.
  • High Connection Capacity: Supports up to 500 controller connections for large distributed systems and multi-device coordination.
  • Digital Alphanumeric Display: Features a 4-character display offering clear diagnostics, fault codes, and module status.
  • Integrated USB Port: Enables convenient local programming, firmware updates, and troubleshooting.
  • Extensive I/O Memory: Includes 0.98 MB of dedicated I/O memory to support large, data-intensive systems.
  • Efficient Power Requirements: Operates on 5 mA at 1.2 VDC and 800 mA at 5.1 VDC, suitable for standard ControlLogix power supplies.
  • Industrial Operating Range: Designed to function reliably from 0 to 60 °C in industrial control cabinet environments.
  • Global Certifications: Meets CE, UL, CUL, KC, Marine, RCM, and GOST standards for worldwide deployment.

The 1756-L73 delivers the reliability and precision required for high-performance control, extensive networking, and large-scale system coordination in modern industrial applications.

Frequently Asked Questions about 1756-L73
Question: What is the 1756-L73?
Date Update:30/05/2025
Answer:

The 1756-L73 is a ControlLogix 5570 controller from Allen-Bradley. It is part of the 1756-series ControlLogix PLCs and is designed for high-speed and complex control applications. The 1756-L73 supports up to 8MB of memory and integrates seamlessly with ControlLogix I/O modules, motion control, and other devices over Ethernet/IP. It provides powerful processing capabilities for a variety of industrial applications, from machine control to process automation.

Question: Where can I find the manual for the 1756-L73?
Date Update:30/05/2025
Answer:

The manual for the 1756-L73 is available on the Rockwell Automation website. You can find the user manual, installation guide, and quick start guide in the Product Documentation section for ControlLogix controllers. The manuals provide detailed instructions for installation, configuration, wiring, and troubleshooting.

Question: How do I configure the 1756-L73 controller?
Date Update:30/05/2025
Answer:

To configure the 1756-L73 controller, follow these steps:

  1. Install Studio 5000 (or RSLogix 5000) software on your PC.
  2. Create a new project in Studio 5000 and select the 1756-L73 controller from the device catalog.
  3. Set up communication by configuring the Ethernet/IP settings and assigning the correct IP address to the controller.
  4. Add I/O modules: Expand the system by adding appropriate ControlLogix I/O modules via the configuration tree.
  5. Develop the program: Use ladder logic, function block diagrams, or structured text to create the control logic for your system.
  6. Download the program to the controller and test the communication and control.

Detailed configuration steps are available in the manual, and additional help can be accessed within Studio 5000 software.

Question: Can the 1756-L73 be used in hazardous locations?
Date Update:30/05/2025
Answer:

The 1756-L73 controller is designed for indoor use with an IP20 rating, making it suitable for dry, indoor environments where dust and moisture are limited. It is not suitable for hazardous locations (e.g., explosion-proof or intrinsically safe environments). If you need a controller for hazardous environments, you should consider models that are rated for use in such environments, like those with an ATEX or Class I Division 2 rating.

Question: How do I troubleshoot the 1756-L73 controller?
Date Update:30/05/2025
Answer:

To troubleshoot the 1756-L73 controller, follow these steps:

  1. Check the status LEDs on the controller to identify any fault conditions (e.g., Status LED, Run/Stop LED, Fault LED).
  2. Verify power supply: Ensure the controller is receiving the correct 24V DC power input.
  3. Check the communication network: Use RSLinx or Studio 5000 to monitor the controller’s communication status. Verify that the Ethernet/IP and other communication networks are operational.
  4. Review error codes: If there is an issue, consult the error codes and diagnostics provided in the Studio 5000 or RSLogix 5000 diagnostic tools.
  5. Check program logic: If the system is not behaving as expected, verify the program logic in Studio 5000 or RSLogix 5000 to ensure that the control processes are correct.

You can also refer to the user manual for specific troubleshooting steps based on the fault codes.

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-L73 is a ControlLogix controller featuring 8 MB of user memory and advanced processing capability for large automation systems. It supports up to 500 controller connections and includes a digital alphanumeric display for status and diagnostics.

 

 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category Controllers
Part Number 1756-L73
Subcategory ControlLogix Controllers
Controller Type Logix5573
User Memory 8 MB
I/O Memory 0.98 MB
Controller Connections Up to 500
Display Type 4-Character Digital Alphanumeric
USB Port Yes
Mounting Type Chassis
Operating Temperature 0–60 °C
Power Requirements 5 mA @ 1.2 VDC, 800 mA @ 5.1 VDC
Certifications CE, CUL, GOST, KC, Marine, RCM, UL
Enclosure None (open-style)
Application ControlLogix Automation and Process Control
Weight 0.66 lb

  

 

Information About 1756-L73

The 1756-L73 is part of the Logix5573 controller family and provides 8 MB of user memory along with 0.98 MB of I/O memory for handling extensive program logic, motion control, and distributed I/O operations. It supports up to 500 controller connections and includes a USB communication port for direct programming and diagnostics. The module mounts in a ControlLogix chassis, operates from 0 to 60 °C, and requires 5 mA at 1.2 VDC and 800 mA at 5.1 VDC for its power needs. Designed with an open-style enclosure and certified to global standards including UL, CE, CUL, KC, Marine, RCM, and GOST, the 1756-L73 offers reliable processing for demanding industrial automation environments.

Key Features:

  • 8 MB User Memory: Provides large program capacity for complex automation, motion, and process applications.
  • High Connection Capacity: Supports up to 500 controller connections for large distributed systems and multi-device coordination.
  • Digital Alphanumeric Display: Features a 4-character display offering clear diagnostics, fault codes, and module status.
  • Integrated USB Port: Enables convenient local programming, firmware updates, and troubleshooting.
  • Extensive I/O Memory: Includes 0.98 MB of dedicated I/O memory to support large, data-intensive systems.
  • Efficient Power Requirements: Operates on 5 mA at 1.2 VDC and 800 mA at 5.1 VDC, suitable for standard ControlLogix power supplies.
  • Industrial Operating Range: Designed to function reliably from 0 to 60 °C in industrial control cabinet environments.
  • Global Certifications: Meets CE, UL, CUL, KC, Marine, RCM, and GOST standards for worldwide deployment.

The 1756-L73 delivers the reliability and precision required for high-performance control, extensive networking, and large-scale system coordination in modern industrial applications.

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