The Allen-Bradley 1769-L34ER, also cataloged as the 1769-L34ER CompactLogix 5370 L3 Controller, operates as a programmable automation controller for executing logic processing, I/O coordination, and EtherNet/IP communication tasks within CompactLogix control platforms.
Hardware Specifications
Parameter
Specification
Model
1769-L34ER
Brand
Allen-Bradley
Origin
USA
Operating Temp
0 deg C to 60 deg C
Power Consumption
Requires 24 VDC isolated power supply
Controller Family
CompactLogix 5370 L3
User Memory
2.0 MB
Ethernet Interface
2 x RJ45 EtherNet/IP ports with DLR support
USB Interface
1 x USB 2.0 full-speed programming port
Local I/O Capacity
Up to 30 I/O modules across 3 I/O banks
Motion Control
Supports up to 16 axes through Integrated Motion over EtherNet/IP
Isolation Voltage
50 V continuous, reinforced insulation type
Enclosure Type
Open-style, IP00
Programming Software
Studio 5000 Logix Designer version 20 or later
Communication Protocols
EtherNet/IP, Modbus via Add-On Instructions, DF1, DH-485 via serial modules
EtherNet/IP and CompactLogix Communication Features
The Allen-Bradley 1769-L34ER controller integrates dual EtherNet/IP interfaces for industrial network communication. The controller supports linear, star, and Device-Level Ring (DLR) topologies, allowing flexible network architecture design.
Furthermore, the controller uses EtherNet/IP deterministic communication for coordinated I/O exchange and motion synchronization. The integrated network interface supports CIP Motion functions, enabling multi-axis control without additional communication adapters.
The controller architecture supports backplane bus communication velocity management and I/O density scaling within the CompactLogix 5370 L3 platform. Therefore, users can expand local I/O configurations while maintaining coordinated controller execution.
Frequently Asked Questions
Q: Does the 1769-L34ER support hot-swapping of CompactLogix I/O modules? A: No. The 1769-L34ER system does not support live removal or insertion of local I/O modules. Power must be removed before changing hardware connections.
Q: What network function is provided by the two Ethernet ports? A: The two RJ45 EtherNet/IP ports support network communication and Device-Level Ring (DLR) topology configurations for connected automation devices.
Q: Which software environment configures the 1769-L34ER controller? A: The controller uses Studio 5000 Logix Designer software for programming, configuration, and firmware-compatible controller management.
Field Installation Guidelines
Install the 1769-L34ER controller on a DIN rail inside an appropriate industrial enclosure. Maintain proper spacing around the controller to support airflow and heat dissipation.
Connect the 24 VDC power supply according to the controller wiring requirements. Use properly rated industrial wiring and separate communication cables from high-voltage power conductors to reduce electrical interference.
For EtherNet/IP connections, use industrial Ethernet cables with suitable shielding and apply correct grounding practices. Verify network topology configuration before commissioning the controller.
Confirm firmware compatibility between the controller, Studio 5000 Logix Designer software, and connected CompactLogix modules before system startup.
