Allen-Bradley 1756-L73 ControlLogix 5570 Controller with 8MB Memory

Allen-Bradley 1756-L73 ControlLogix 5570 Controller with 8MB Memory

Price range: $1,627.50 through $4,064.10

The Allen-Bradley 1756-L73 is a ControlLogix 5570 controller featuring 8 MB of user memory and USB high-speed programming support for large-scale industrial operations. Designed to manage demanding discrete, motion, process, and safety applications, it offers high-speed execution times and expansive tag storage for complex automation systems. Its front-panel USB 2.0 port simplifies local programming, commissioning, and firmware flashes without needing active network connections. Replacing traditional lithium batteries with an Energy Storage Module (ESM), it provides reliable non-volatile data preservation and supports Removal and Insertion Under Power (RIUP) for maximum operational uptime.

$1,627.50
$3,487.50
$4,064.10
SKU: 1756-L73 Category: Brand:

Description

  • Part Number: 1756-L73
  • Manufacturer: Allen-Bradley
  • Type: ControlLogix 5570 Controller
  • Series: ControlLogix 1756 Series
  • Application: Large-Scale Industrial Process Control
  • Size // Rating: 8 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.

Industrial Repair Services

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Description

The Allen-Bradley 1756-L73 is a high-capacity 5570 Series ControlLogix processor designed to handle complex, data-intensive automation tasks across manufacturing and process facilities. Featuring 8 MB of user application memory, it easily accommodates large tag structures, extensive recipe management routines, complex math algorithms, and multi-axis motion control tasks across demanding multi-chassis architectures.

Engineered for operational flexibility, the 1756-L73 integrates a front-panel USB 2.0 port, providing field engineers and technicians with a dedicated high-speed point-to-point interface for direct system configuration, firmware flashing, and online ladder logic editing using Studio 5000 Logix Designer or RSLogix 5000 software. The controller supports integrated motion over EtherNet/IP, ControlNet, and SERCOS interfaces, allowing precise synchronization of servo drives and field actuators without compromising PLC scan performance.

To ensure high system availability and eliminate maintenance overhead, the 1756-L73 utilizes an Energy Storage Module (ESM) rather than traditional lithium batteries to write volatile RAM contents to non-volatile flash memory during sudden power failures. With built-in digital diagnostic displays and full Removal and Insertion Under Power (RIUP) capability, the 1756-L73 enables safe, live hardware servicing without shutting down chassis backplane power or interrupting adjacent I/O modules.

Frequently Asked Questions

What is the primary function of the Allen-Bradley 1756-L73 controller?

The 1756-L73 is a ControlLogix 5570 PAC that executes large-scale discrete logic, multi-axis motion control, and continuous process control routines.

How much user memory does the 1756-L73 provide?

It features 8 MB of user application memory for program code, system tags, and operational data storage.

What is the purpose of the front-panel USB port on the 1756-L73?

The USB 2.0 port provides a direct local connection for PC programming tools (such as Studio 5000) to configure the controller, edit logic, and update firmware without needing network access.

Does the 1756-L73 require a lithium battery for memory backup?

No. It uses a removable Energy Storage Module (ESM), such as the 1756-ESMCAP or 1756-ESMNSE, which charges during normal operation and saves memory to onboard non-volatile flash during power loss.

What programming software is required for the 1756-L73?

The 1756-L73 is programmed and configured using Studio 5000 Logix Designer or RSLogix 5000 software (Version 20 and higher).

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