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Allen Bradley

Allen Bradley 1756-L55M16 ControlLogix Controller

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ManufacturerAllen Bradley

Part number1756-L55M16

User Memory 7.5MB

I/O Memory 208KB

CPU Logix and Backplane

Software RSLogix 5000

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12-month warranty

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CAGE: 9NK75

7.5MB Data/Logic Memory 208KB I/O Memory Logix & Backplane CPU Multitasking Capability RSLogix 5000 Support Fault Handler

Product description

The Allen-Bradley 1756-L55M16 is a ControlLogix controller from the Logix5000 series. It features 7.5 MB of data and logic memory and 208 KB of I/O memory, with a Logix and a backplane CPU to divide its resources. The Logix CPU executes application code and messages, while the backplane CPU handles data exchange with the backplane and I/O. It connects to workstations or other controllers via a serial port using a 1756-CP3 serial cable.

This controller supports Logix5000 programming languages, both online and offline. It includes an I/O LED for communication failure diagnostics and a fault handler for advanced diagnostics. The 1756-L55M16 supports multitasking, allowing processing time allocation for different operations, and includes programs for group data and logic, with routines for encapsulating executable code in a single programming language.

Source your Allen-Bradley 1756-L55M16 controller from Stanlo Automation, a trusted veteran-owned distributor. We ensure reliable access to essential industrial automation components, providing quality parts and exceptional service for your operational needs.

Technical specifications

User Memory	7.5MB
I/O Memory	208KB
CPU	Logix and Backplane
Software	RSLogix 5000
Operating Temperature	0°C to +60°C

Common applications

Discrete Automation

Process Automation

Packaging Lines

Material Handling

Automotive Assembly

Utility Plant Automation

Compatible systems

1756 ControlLogix Chassis EtherNet/IP ControlNet DeviceNet

Also known as

ControlLogix 5555 Series B Logix5555 Processor 1756-L55 Base

Replaces / compatible with

Compatible with 1756 ControlLogix chassis and 1756 communication modules.

Technical note

Expert tip

Requires a 1756-BA1 or 1756-BATM battery, which needs regular maintenance.

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Frequently asked questions

What is the memory capacity of the Allen Bradley 1756-L55M16 controller?

The Allen Bradley 1756-L55M16 controller features 7.5 MB of data and logic memory, and 208 KB of I/O memory. This provides ample capacity for complex programming and I/O management.