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A-B 1756-L73 ControlLogix 5570 Controller

Product Overview

The Allen-Bradley 1756-L73 is a ControlLogix 5570 programmable automation controller designed for complex industrial control applications. It provides 8 MB of user memory, USB programming connectivity, and support for distributed I/O and industrial communication networks. It is installed in a compatible ControlLogix chassis.

Key Technical Specifications

Specification	Details
Brand	Allen-Bradley (A-B)
Model	1756-L73
Product Series	ControlLogix 5570
Controller Type	Programmable Automation Controller (PAC)
User Memory	8 MB
I/O Memory	0.98 MB
Maximum Digital I/O	128,000
Maximum Analog I/O	4,000
Programming Port	USB
Display	4-character alphanumeric display
Nonvolatile Storage	Secure Digital (SD) card
Communication	Requires compatible chassis communication modules for network connectivity
Power Supply	Supplied through the ControlLogix chassis backplane
Installation	Compatible ControlLogix chassis
Lifecycle Status	Active Mature; replacement available US +1

Features & Advantages

High-performance processing for complex automation tasks.
8 MB of user memory for application programs and controller data.
Supports large distributed I/O configurations.
USB connection for programming and maintenance.
Compatible with Studio 5000 Logix Designer.
Expandable communication through compatible ControlLogix modules.

Typical Applications

Industrial manufacturing and process control
Production and assembly lines
Distributed I/O systems
Material handling and packaging machinery
Large-scale machine automation
Industrial control system integration

Important Notes

The 1756-L73 is a controller, not a standalone I/O module.
A compatible ControlLogix chassis and power supply are required.
Ethernet/IP and other network connections generally require suitable communication modules.
Confirm firmware compatibility and Studio 5000 software version before installation.
Do not confuse the standard 1756-L73 with safety or enhanced variants such as the 1756-L73S or 1756-L73XT.