Allen-Bradley 1756-L71 ControlLogix 5570 Controller with 2MB Memory

Allen-Bradley 1756-L71 ControlLogix 5570 Controller with 2MB Memory

Price range: $1,688.88 through $2,393.82

The Allen-Bradley 1756-L71 is a ControlLogix 5570 controller equipped with 2 MB of user memory and an onboard USB 2.0 programming port for rapid controller configuration. Designed for small-to-medium discrete, motion, and process control applications, it delivers high-speed processing and scan rates across ControlLogix chassis backplanes. Featuring an onboard USB 2.0 interface for easy local programming, commissioning, and firmware updates without needing network connections, it simplifies installation and maintenance. Utilizing a removable Energy Storage Module (ESM) to replace traditional lithium batteries, it provides reliable non-volatile data preservation and supports Removal and Insertion Under Power (RIUP) for continuous system availability.

$1,688.88
$2,279.43
$2,393.82
SKU: 1756-L71 Category: Brand:

Description

  • Part Number: 1756-L71
  • Manufacturer: Allen-Bradley
  • Type: ControlLogix 5570 Controller
  • Series: ControlLogix 1756 Series
  • Application: Modern Manufacturing Line Control
  • Size // Rating: 2 MB User Memory, USB 2.0 Programming Port
  • Connection Type: USB 2.0 Port / SD Card Slot / Backplane
  • Compatibility: Allen-Bradley ControlLogix 1756 System

TCI is not an authorized Allen-Bradley distributor.

Documentation

No documentation is available for this product.

Warranty Coverage

This product is backed by a TCI Supply 1 year Warranty.

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Description

The Allen-Bradley 1756-L71 is an entry-level processor in the ControlLogix 5570 controller family, engineered to provide fast processing speeds and high-performance control for compact to mid-sized industrial automation systems. With 2 MB of user application memory, it efficiently manages program routines, system tags, data logging, and multi-axis motion control loops across automated manufacturing lines.

Designed for user-friendly configuration and field maintenance, the 1756-L71 incorporates a front-panel USB 2.0 port. This dedicated point-to-point connection allows controls engineers to connect a PC running Studio 5000 Logix Designer or RSLogix 5000 software directly to the controller for rapid commissioning, ladder logic editing, and firmware updates without altering active network parameters. Paired with companion communication cards (such as EtherNet/IP or ControlNet modules), the controller seamlessly coordinates distributed I/O, drives, and supervisory software.

To maximize operational reliability and reduce maintenance overhead, the 1756-L71 replaces conventional lithium backup batteries with a removable Energy Storage Module (ESM). In the event of an unexpected power outage, the ESM powers the controller long enough to write active volatile RAM contents safely into non-volatile flash storage. Built-in digital status indicators and full Removal and Insertion Under Power (RIUP) capability allow technicians to inspect system health or swap hardware live without interrupting power to the chassis or adjacent modules.

Frequently Asked Questions

What is the primary function of the Allen-Bradley 1756-L71 controller?

The 1756-L71 is a ControlLogix 5570 PAC designed to manage discrete logic, process control, and motion control in small-to-medium automation systems.

How much user memory does the 1756-L71 offer?

How much user memory does the 1756-L71 offer?

What is the function of the USB port on the front of the 1756-L71?

The front USB 2.0 port allows direct PC connection for programming, configuring tags, editing logic, and flashing controller firmware without needing an Ethernet or network setup.

Does the 1756-L71 require a backup lithium battery?

No. It utilizes an Energy Storage Module (ESM), such as the 1756-ESMCAP or 1756-ESMNSE, which charges during operation to save RAM contents to non-volatile flash memory during power loss.

Which software is required to program the 1756-L71?

The 1756-L71 is configured and programmed using Studio 5000 Logix Designer or RSLogix 5000 software (Version 20 or higher).

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