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Allen Bradley

Allen Bradley 1769-L23E-QB1B CompactLogix 5370 L2 Controller

Allen Bradley 1769-L23E-QB1B CompactLogix 5370 L2 Controller.

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ManufacturerAllen Bradley

Part number1769-L23E-QB1B

User Memory 512 KB

Embedded Inputs 16 x 24 VDC

Embedded Outputs 16 x 24 VDC transistor

Communication Ports 1 x Ethernet/IP, 1 x RS232

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Veteran-owned

CAGE: 9NK75

Integrated packaged design 512 KB user memory 16 DC inputs and 16 DC outputs Ethernet/IP and RS-232 communication Compact footprint DIN rail or panel mount

Product description

The Allen-Bradley 1769-L23E-QB1B is a CompactLogix 5370 L2 packaged controller, integrating CPU, power supply, and I/O into a single unit for machine-level automation. It features 512 KB of user memory, built-in Ethernet/IP and RS-232 serial ports, and 16 digital inputs and 16 transistor outputs.

This controller is ideal for applications with limited space and moderate I/O requirements, offering expansion capability for up to three 1769 Compact I/O modules. It supports programming languages such as Ladder, Structured Text, Function Block, and SFC, and is compatible with RSLogix 5000 software.

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Technical specifications

User Memory	512 KB
Embedded Inputs	16 x 24 VDC
Embedded Outputs	16 x 24 VDC transistor
Communication Ports	1 x Ethernet/IP, 1 x RS232
Mounting	DIN rail or panel mount
Power Supply	Integrated 24 VDC
Expansion	Max 3 x 1769 I/O modules
Certifications	UL, CE, CSA

Common applications

Machine control

Packaging machinery

Material handling

OEM equipment

Distributed control systems

Compatible systems

CompactLogix 5370 controllers RSLogix 5000 software

Also known as

Allen Bradley CompactLogix 5370 1769L23E-QB1B CompactLogix L2

Replaces / compatible with

This controller is part of the CompactLogix 5370 L2 family and is designed for new applications. Compatibility with older systems may vary.

Technical note

Expert tip

The 1769-L23E-QB1B controller does not require an external battery for memory retention due to its internal energy storage solution.

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Frequently asked questions

What are the communication capabilities of the Allen Bradley 1769-L23E-QB1B?

The 1769-L23E-QB1B features one Ethernet/IP port and one RS-232 serial port. These ports support communication protocols such as DF1, DH485, ASCII, and Ethernet/IP, enabling seamless integration with HMIs, SCADA systems, and other controllers.