1769-L34ER Allen-Bradley CompactLogix Processor

Product Overview

The 1769-L34ER is a mid-to-high range controller in the CompactLogix 5370 L3 family, delivering enhanced processing performance and increased memory capacity for complex automation architectures. Equipped with dual EtherNet/IP ports, it supports Device Level Ring (DLR) topologies to provide network redundancy and high system availability. This controller is well suited for applications requiring a higher number of distributed I/O points and motion axes than the entry-level L30 series, while retaining a compact, fanless industrial design.

Technical Specifications

Advanced Controller Features

The 1769-L34ER uses a maintenance-free energy storage module, eliminating the need for a lithium battery to preserve the real-time clock and volatile memory during power interruptions. Programming and configuration are performed using the Studio 5000 Logix Designer environment, ensuring a consistent engineering experience across the Logix 5000 platform. With support for up to 32 EtherNet/IP nodes, the controller can manage extensive networks of PowerFlex drives, POINT I/O, Compact I/O, and Kinetix servo systems within a single control architecture.

System Capabilities Comparison

• Memory Capacity: 2 MB, double that of the 1769-L30ER

• EtherNet/IP Nodes: Up to 32 nodes, suitable for medium-sized systems

• Local I/O Support: Up to 16 modules, doubling the expansion capacity of the 1769-L30ER

Common Technical Questions

Does the 1769-L34ER support Device Level Ring (DLR)?
Yes. The dual EtherNet/IP ports function as an embedded switch. When configured in a DLR topology, the controller can tolerate a single network cable or device failure without loss of communication to downstream I/O or drives.

What software version is required for this controller?
The 1769-L34ER typically requires RSLogix 5000 or Studio 5000 Logix Designer version 20 or later, depending on the installed firmware revision.