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Allen Bradley 1756-L55M23 ControlLogix 5555 Processor

Allen Bradley 1756-L55M23 ControlLogix Processor Module

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ManufacturerAllen Bradley

Part number1756-L55M23

Memory 1.5 MB RAM

Nonvolatile Memory 1.5 MB

Max I/O 128,000 points

Max Analog I/O 4,000 input / 2,000 output

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12-month warranty

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Veteran-owned

CAGE: 9NK75

1.5 MB RAM 1.5 MB nonvolatile memory High I/O capacity Fast scan time Robust communication options Battery-backed operation

Product description

The Allen-Bradley 1756-L55M23 is a ControlLogix processor module from the Logix5000 family, designed for medium to large-scale automation tasks. It features 1.5 MB of RAM and 1.5 MB of nonvolatile memory, ensuring reliable execution of logic control applications. This controller has a Logix CPU and a backplane CPU to divide its resources, with application codes and messages executed by the Logix CPU, while the backplane CPU handles data communication.

This processor is well-suited for various industrial applications, including centralized control, coordinated motion, and high-speed I/O processing. It communicates via multiple networks such as EtherNet/IP, ControlNet, and DeviceNet, making it a versatile choice for complex automation systems. Its multitasking feature allows for efficient allocation of processing time to different operations.

Source your Allen-Bradley 1756-L55M23 controller from Stanlo Automation, a veteran-owned distributor. We offer reliable surplus parts to keep your operations running smoothly. Ensure your industrial control systems are supported by quality components from a trusted supplier.

Technical specifications

Memory	1.5 MB RAM
Nonvolatile Memory	1.5 MB
Max I/O	128,000 points
Max Analog I/O	4,000 input / 2,000 output
Program Scan Time	0.08 ms
Backplane Current (5V DC)	1.23 A
Backplane Current (24V DC)	14 mA
Vibration Rating	10–500 Hz
Humidity	5–95% noncondensing
Battery Type	1756-BA1 or 1756-BATM

Common applications

Centralized control

Coordinated motion

High-speed I/O processing

Real-time control

Industrial automation systems

Compatible systems

ControlLogix chassis Logix5000 software EtherNet/IP ControlNet DeviceNet RS-232 (DF1/DH-485)

Also known as

Allen Bradley Logix5555 ControlLogix Logix5555 1756-L55/A 1756-M23

Replaces / compatible with

The 1756-L55M23 controllers have nonvolatile memory and can be used without a battery. It is a component of the ControlLogix family.

Technical note

Expert tip

This controller can be inserted into any slot of a ControlLogix chassis, and multiple controllers can operate independently within the same chassis, communicating across the backplane.

What happens next?

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Frequently asked questions

What are the memory specifications for the Allen-Bradley 1756-L55M23 controller?

The Allen-Bradley 1756-L55M23 controller is equipped with 1.5 MB of RAM for data and logic, and an additional 1.5 MB of integrated nonvolatile backup memory. This provides ample capacity for storing application data and retaining it during power loss.