1756-L71 | Allen-Bradley ControlLogix Logix5571 Processor with 2 MB User Memory
1756-L71 | Allen-Bradley ControlLogix Logix5571 Processor with 2 MB User Memory
1756-L71 | Allen-Bradley ControlLogix Logix5571 Processor with 2 MB User Memory
    1756-L71 | Allen-Bradley ControlLogix Logix5571 Processor with 2 MB User Memory
1756-L71 | Allen-Bradley ControlLogix Logix5571 Processor with 2 MB User Memory

1756-L71 | Allen-Bradley ControlLogix Logix5571 Processor with 2 MB User Memory

Part #: 1756-L71 Manufactured by: Allen-Bradley
$1,765.00
$1,765.00
31 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
Allen-Bradley 1756-L71 ControlLogix Logix5571 Controller with 2 MB User Memory and 1 x Built-in USB 2.0 Programming/Downlo...  Read more
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Product Description P/N: 1756-L71

Description / Specifications

Description

The Allen-Bradley 1756-L71 is a ControlLogix Logix5571 processor module designed for medium-to-large automation systems requiring high-speed execution and extensive I/O capacity. It features 2 MB of user memory, 0.98 MB of I/O memory, and a built-in USB communication port for efficient programming and diagnostics.

 

 

Technical Specifications

Condition New/Never Used Surplus
Brand Allen-Bradley
Category PLC Controllers
Part Number 1756-L71
Subcategory ControlLogix Controllers
Series ControlLogix
User Memory 2 MB
I/O Memory 0.98 MB
Non-Volatile Memory 1 GB SD card (upgradeable to 2 GB)
Built-In Communication USB 2.0 full-speed
Supported Networks EtherNet/IP, ControlNet, DeviceNet, DH+, Remote I/O, SynchLink
Integrated Motion SERCOS, LDT input, SSI input, analog encoder options
Maximum Digital I/O 128,000
Maximum Analog I/O 4,000
Number of Tasks 32
Programs per Task 100
Current Draw (1.2 VDC) 5 mA
Current Draw (5.1 VDC) 800 mA
Power Dissipation 2.5 W
Thermal Dissipation 8.5 BTU/hr
Isolation Voltage 30 V continuous
Enclosure Open
Operating Temperature 0–60°C
Mounting ControlLogix chassis (1756-A4/A7/A10/A13/A17 and variants)
Manufacturer Rockwell Automation

  

 

Information About 1756-L71

The 1756-L71 is part of the ControlLogix Logix557x controller family, engineered to support complex automation tasks through advanced multitasking, motion integration, and extensive communication options. It supports up to 32 tasks and 100 programs per task, enabling structured, scalable project development. The controller ships with a 1 GB SD card for nonvolatile storage and uses a capacitor-based energy storage module instead of a battery to retain volatile memory. Designed for installation in any ControlLogix chassis slot, it supports full redundancy, high-speed motion control with SERCOS and EtherNet/IP, and a wide range of communication adapters for flexible system integration.

Key Features:

  • High-Performance Processor: Provides 2 MB user memory and 0.98 MB I/O memory for large control applications.
  • Extensive I/O Capacity: Supports up to 128,000 digital I/O points and 4,000 analog I/O points.
  • Integrated USB Port: Full-speed USB 2.0 connection for programming and diagnostics.
  • Advanced Motion Support: Compatible with SERCOS, SSI, LDT, and integrated motion over EtherNet/IP.
  • Full Redundancy Capability: Supports ControlLogix redundancy systems for high-availability applications.
  • Modular Communication Options: Works with EtherNet/IP, ControlNet, DeviceNet, Remote I/O, DH+, SynchLink, and third-party networks.
  • No Battery Required: Uses capacitor-based energy storage (1756-ESMCAP/ESMCAPK) for RAM retention.
  • Rugged Industrial Design: Supports high vibration, wide temperature range, and non-condensing environments.

The 1756-L71 delivers the reliability and precision required for large-scale industrial automation and high-performance control systems.

Frequently Asked Questions about 1756-L71
Question: What are the key features of the 1756-L71 ControlLogix processor?
Date Update:04/06/2025
Answer:

The Allen-Bradley 1756-L71 is a high-performance ControlLogix 5570 processor designed for demanding automation applications. Key features include:

  • User Memory: 2 MB
  • I/O Memory: 0.98 MB
  • Maximum I/O Capacity: 128,000 total I/O points
  • Maximum Analog I/O: 4,000 points
  • Maximum Digital I/O: 128,000 points
  • Built-in Communication Ports: 1 USB 2.0 full-speed port for programming and configuration
  • Supported Communication Protocols: EtherNet/IP™, ControlNet™, DeviceNet™, Data Highway Plus™, Remote I/O, SynchLink, and third-party process and device networks
  • Enclosure Type: Open-style
  • Power Consumption: 5 mA at 1.2V DC and 800 mA at 5.1V DC
  • Power Dissipation: 2.5 W
  • Thermal Dissipation: 8.5 BTU/hr
  • Operating Temperature Range: 0°C to 60°C (32°F to 140°F)
  • Storage Temperature Range: -40°C to 85°C (-40°F to 185°F)
  • Relative Humidity: 5% to 95% (non-condensing)

These specifications make the 1756-L71 suitable for a wide range of industrial automation applications.

Question: What software is compatible with the 1756-L71 processor?
Date Update:04/06/2025
Answer:

The 1756-L71 processor is compatible with the following Rockwell Automation software:

  • Studio 5000 Logix Designer: Version 21.00.00 or later
  • RSLinx Classic: Version 2.59.00 or later
  • RSLogix 5000: Version 20.01.02 or later

These software packages provide the necessary tools for programming, configuration, and communication with the 1756-L71 processor.

Question: What are the environmental and physical specifications of the 1756-L71 processor?
Date Update:04/06/2025
Answer:

The 1756-L71 processor has the following environmental and physical specifications:

  • Operating Temperature: 0°C to 60°C (32°F to 140°F)
  • Storage Temperature: -40°C to 85°C (-40°F to 185°F)
  • Relative Humidity: 5% to 95% (non-condensing)
  • Shock Rating: IEC 60068-2-27
  • Vibration Rating: IEC 60068-2-6
  • Weight: Approximately 0.25 kg (0.55 lbs)
  • Dimensions (H x W x D): 138 mm x 46 mm x 180 mm (5.43 in x 1.81 in x 7.09 in)

These specifications ensure that the 1756-L71 processor can operate reliably in various industrial environments.

Question: How does the 1756-L71 processor handle redundancy?
Date Update:04/06/2025
Answer:

The 1756-L71 processor supports redundancy configurations to enhance system reliability. Key features include:

  • Redundant Controllers: Allows for the installation of two processors in the same chassis, providing automatic failover in case of a processor failure.
  • Redundant Power Supplies: Supports dual power supplies to ensure continuous operation during power supply failures.
  • Redundant Communication Modules: Enables the use of multiple communication modules for network redundancy.

These redundancy features help maintain system availability and minimize downtime in critical applications.

Question: What certifications does the 1756-L71 processor have?
Date Update:04/06/2025
Answer:

The 1756-L71 processor is certified for the following standards:

  • CE: Compliant with European Union Directives
  • KC (Korea Certification): Certified for use in South Korea
  • C-Tick: Compliant with Australian EMC requirements
  • UL Listed: Meets safety standards for industrial control equipment
  • IECEx: Certified for use in explosive atmospheres

These certifications ensure that the 1756-L71 processor meets international safety and electromagnetic compatibility standards.

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-L71 is a ControlLogix Logix5571 processor module designed for medium-to-large automation systems requiring high-speed execution and extensive I/O capacity. It features 2 MB of user memory, 0.98 MB of I/O memory, and a built-in USB communication port for efficient programming and diagnostics.

 

 

Technical Specifications

Condition New/Never Used Surplus
Brand Allen-Bradley
Category PLC Controllers
Part Number 1756-L71
Subcategory ControlLogix Controllers
Series ControlLogix
User Memory 2 MB
I/O Memory 0.98 MB
Non-Volatile Memory 1 GB SD card (upgradeable to 2 GB)
Built-In Communication USB 2.0 full-speed
Supported Networks EtherNet/IP, ControlNet, DeviceNet, DH+, Remote I/O, SynchLink
Integrated Motion SERCOS, LDT input, SSI input, analog encoder options
Maximum Digital I/O 128,000
Maximum Analog I/O 4,000
Number of Tasks 32
Programs per Task 100
Current Draw (1.2 VDC) 5 mA
Current Draw (5.1 VDC) 800 mA
Power Dissipation 2.5 W
Thermal Dissipation 8.5 BTU/hr
Isolation Voltage 30 V continuous
Enclosure Open
Operating Temperature 0–60°C
Mounting ControlLogix chassis (1756-A4/A7/A10/A13/A17 and variants)
Manufacturer Rockwell Automation

  

 

Information About 1756-L71

The 1756-L71 is part of the ControlLogix Logix557x controller family, engineered to support complex automation tasks through advanced multitasking, motion integration, and extensive communication options. It supports up to 32 tasks and 100 programs per task, enabling structured, scalable project development. The controller ships with a 1 GB SD card for nonvolatile storage and uses a capacitor-based energy storage module instead of a battery to retain volatile memory. Designed for installation in any ControlLogix chassis slot, it supports full redundancy, high-speed motion control with SERCOS and EtherNet/IP, and a wide range of communication adapters for flexible system integration.

Key Features:

  • High-Performance Processor: Provides 2 MB user memory and 0.98 MB I/O memory for large control applications.
  • Extensive I/O Capacity: Supports up to 128,000 digital I/O points and 4,000 analog I/O points.
  • Integrated USB Port: Full-speed USB 2.0 connection for programming and diagnostics.
  • Advanced Motion Support: Compatible with SERCOS, SSI, LDT, and integrated motion over EtherNet/IP.
  • Full Redundancy Capability: Supports ControlLogix redundancy systems for high-availability applications.
  • Modular Communication Options: Works with EtherNet/IP, ControlNet, DeviceNet, Remote I/O, DH+, SynchLink, and third-party networks.
  • No Battery Required: Uses capacitor-based energy storage (1756-ESMCAP/ESMCAPK) for RAM retention.
  • Rugged Industrial Design: Supports high vibration, wide temperature range, and non-condensing environments.

The 1756-L71 delivers the reliability and precision required for large-scale industrial automation and high-performance control systems.

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