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
$3,745.00
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$3,745.00
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Condition: New-Surplus Original Box
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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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Product Description P/N: 1756-L73

Description / Specifications

Description 

The Allen-Bradley 1756-L73 controller is a standard controller model from the Allen-Bradley ControlLogix product line. It is a ControlLogix 5570 type of controller that can handle 100 programs per task at a time and up to 32 tasks at a time. The 1756-L73 ControlLogix 5570 controller supports several communication options, including the ControlNet, Ethernet/IP, DeviceNet, Synchlink, Remote I/O, and the Data Highway Plus device networks. It is also compatible with several third-party device networks. The 1756-L73 ControlLogix 5570 controller also supports controller redundancy and up to 500 controller connections at a time.

 

Technical Specifications 

 

Brand Allen-Bradley
Series ControlLogix 
Part Number 1756-L73
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
Chassis 1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K,1756-A17, 1756- A17K
Communication interfaces One (1) USB
Enclosure None (Open-Style)
Isolation Voltage 30 Volts Continuous
Current Draw (1.2 Volts DC) 5.0 Miliamperes
Current Draw (5.1 Volts) 800 Miliamperes
Power Dissipation 2.5 Watts
I-O Memory 0.98 MB
User Memory 8 MB
Maximum I-O 128,000
Maximum Analog I-O 4,000
Maximum Digital I-O 128,000
Thermal Dissipation 8.5 BTU per hour

  

 

Information About 1756-L73

The Allen-Bradley 1756-L73 is a ControlLogix processor module that is part of the Logix 5570 product category. This is a Programmable Automation Controller (PAC) that is compatible for use in controlling large applications in the factory or process automation applications. It supports simplex configuration and high-availability (redundant) controller configuration for increased system availability.

The 1756-L73 is capable of interfacing 128,000 input and output signals as well as 4000 analog Input and output signals. It can be implement local I/O configuration where I/O modules are installed within the same chassis where the controller is installed or distributed I/O topology where expansion I/Os are installed remote from the processor and provides I/O through the extended communication bus. This controller supports Ethernet I/P, DeviceNet, ControlNet, Synchlink, as well legacy communication protocols such as Data Highway Plus (DH+), Remote I/O (RIO) and 3rd party protocols. It may also be configured to communicate with gateways and protocol converters. Similarly, this controller is compatible with any Allen-Bradley encompass partner ControlLogix modules.

This controller also comes with integrated motion as it supports SERCOS interface, analog motion sensors and motion control over Ethernet I/P. When programming this controller, applicable programming languages include relay ladder, structured text, function block diagram, and sequential function chart.

This controller is capable of handling 32 controller tasks, with 100 programs per task while event tasks accept all event triggers. This controller comes with 8MB user memory and I/O memory of 0.98 MB. It is also equipped with energy storage technology, eliminating use of battery for retaining contents of the volatile memory.

The 1756-L73 can use up to 8 MB of user memory with 0.98 MB of Input/Output memory. In addition, it has 128,000 total and digital I/O and 4000 analog I/O at most. The required current draw at 1.2V DC is 5 mA and 800 mA current draw is required at 5.1V DC. The 1756-L73 has 2.5 W power dissipation and 8.5 BTU/hour thermal dissipation. The isolation voltage is continuous at 30 V with basic insulation, tested at 500V AC for 60 seconds. Using a USB 2.0, it can reach up to 12 Mbps at its full speed. Approximately, it only weighs 0.25 kg with a 1-slot width and an open-style enclosure.

The module is chassis-based at any slot for the 1756 chassis series. The 1756-L73 controller’s power requirement is a standard 1756 power supply. Its wiring category is 3 on USB ports. The 1756-L73 controller has an operating temperature of 0-60 deg. Celsius and its non-operating temperature is -40-85 °. Celsius. The maximum surrounding temperature that it can operate at is 60°. Celsius with 5 - 95% non-condensing relative humidity. Its operating vibration is 10 - 500 Hz is 2 g and its operating shock is 30 g operating shock while its non-operating shock is 50 g. It can reach 45 g when an SD card was installed.



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-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.
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-L73 controller is a standard controller model from the Allen-Bradley ControlLogix product line. It is a ControlLogix 5570 type of controller that can handle 100 programs per task at a time and up to 32 tasks at a time. The 1756-L73 ControlLogix 5570 controller supports several communication options, including the ControlNet, Ethernet/IP, DeviceNet, Synchlink, Remote I/O, and the Data Highway Plus device networks. It is also compatible with several third-party device networks. The 1756-L73 ControlLogix 5570 controller also supports controller redundancy and up to 500 controller connections at a time.

 

Technical Specifications 

 

Brand Allen-Bradley
Series ControlLogix 
Part Number 1756-L73
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
Chassis 1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K,1756-A17, 1756- A17K
Communication interfaces One (1) USB
Enclosure None (Open-Style)
Isolation Voltage 30 Volts Continuous
Current Draw (1.2 Volts DC) 5.0 Miliamperes
Current Draw (5.1 Volts) 800 Miliamperes
Power Dissipation 2.5 Watts
I-O Memory 0.98 MB
User Memory 8 MB
Maximum I-O 128,000
Maximum Analog I-O 4,000
Maximum Digital I-O 128,000
Thermal Dissipation 8.5 BTU per hour

  

 

Information About 1756-L73

The Allen-Bradley 1756-L73 is a ControlLogix processor module that is part of the Logix 5570 product category. This is a Programmable Automation Controller (PAC) that is compatible for use in controlling large applications in the factory or process automation applications. It supports simplex configuration and high-availability (redundant) controller configuration for increased system availability.

The 1756-L73 is capable of interfacing 128,000 input and output signals as well as 4000 analog Input and output signals. It can be implement local I/O configuration where I/O modules are installed within the same chassis where the controller is installed or distributed I/O topology where expansion I/Os are installed remote from the processor and provides I/O through the extended communication bus. This controller supports Ethernet I/P, DeviceNet, ControlNet, Synchlink, as well legacy communication protocols such as Data Highway Plus (DH+), Remote I/O (RIO) and 3rd party protocols. It may also be configured to communicate with gateways and protocol converters. Similarly, this controller is compatible with any Allen-Bradley encompass partner ControlLogix modules.

This controller also comes with integrated motion as it supports SERCOS interface, analog motion sensors and motion control over Ethernet I/P. When programming this controller, applicable programming languages include relay ladder, structured text, function block diagram, and sequential function chart.

This controller is capable of handling 32 controller tasks, with 100 programs per task while event tasks accept all event triggers. This controller comes with 8MB user memory and I/O memory of 0.98 MB. It is also equipped with energy storage technology, eliminating use of battery for retaining contents of the volatile memory.

The 1756-L73 can use up to 8 MB of user memory with 0.98 MB of Input/Output memory. In addition, it has 128,000 total and digital I/O and 4000 analog I/O at most. The required current draw at 1.2V DC is 5 mA and 800 mA current draw is required at 5.1V DC. The 1756-L73 has 2.5 W power dissipation and 8.5 BTU/hour thermal dissipation. The isolation voltage is continuous at 30 V with basic insulation, tested at 500V AC for 60 seconds. Using a USB 2.0, it can reach up to 12 Mbps at its full speed. Approximately, it only weighs 0.25 kg with a 1-slot width and an open-style enclosure.

The module is chassis-based at any slot for the 1756 chassis series. The 1756-L73 controller’s power requirement is a standard 1756 power supply. Its wiring category is 3 on USB ports. The 1756-L73 controller has an operating temperature of 0-60 deg. Celsius and its non-operating temperature is -40-85 °. Celsius. The maximum surrounding temperature that it can operate at is 60°. Celsius with 5 - 95% non-condensing relative humidity. Its operating vibration is 10 - 500 Hz is 2 g and its operating shock is 30 g operating shock while its non-operating shock is 50 g. It can reach 45 g when an SD card was installed.



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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