Allen-Bradley 1769-L33ER is a mid-to-high tier CompactLogix 5370 series PLC controller with 2MB user memory and dual EtherNet/IP ports. Supporting DLR ring network topology and 32 EtherNet/IP nodes, it delivers powerful logic processing and stable network control, ideal for medium and complex discrete automation systems and factory network upgrade projects.

Core Technical Parameter Specifications

Controller Series：CompactLogix 5370 L3 High-performance CPU

User Memory：2MB program and data storage capacity

Network Interface：Dual 10/100Mbps EtherNet/IP ports (DLR topology support)

Max Network Nodes：Supports up to 32 EtherNet/IP device connections

Local I/O Expansion：Max 16pcs 1769 Compact I/O modules / 3 I/O banks

Onboard Storage：1GB standard SD card, expandable up to 2GB

Programming Port：Front USB Type-B port for fast download and debugging

Task Processing：Supports 32 multitasks for complex program scheduling

Backplane Current Draw：2.0A @5VDC operating current

Operating Temperature：0℃ ~ +60℃ continuous industrial operation

Certifications：UL, CSA, CE, Class I Div 2 hazardous location compliance

Dual-Port DLR Network & Enhanced Processing Performance

Compared with entry-level L30ER series controllers, the 1769-L33ER features doubled 2MB memory and expanded network node capacity, supporting more complex program logic, data recording and multi-device linkage control. The dual-Ethernet DLR redundant network design effectively avoids single-point network failures, greatly improving production line operational stability and anti-interference capability.

Adopting unified Studio 5000 Logix Designer programming, the controller supports multitask scheduling and standardized industrial control languages. Built-in real-time clock and non-volatile memory ensure reliable program storage and accurate equipment operation timing. Front panel LED indicators intuitively display network, power and running status, simplifying on-site fault diagnosis and daily maintenance.

High-Capacity Expansion & System Retrofit Compatibility

AllenBradley 1769-L33ER achieves full compatibility with all 1769 series digital, analog, communication and temperature I/O modules. The 16-channel local I/O and 32 network node expansion capability easily meets the control demands of medium-sized automated production lines and multi-device distributed systems.

It serves as an ideal upgrade replacement for discontinued L32E/L30ER legacy controllers. With consistent chassis installation size and backplane protocol, it requires no cabinet modification or wiring adjustment during renovation. Native open EtherNet/IP protocol enables seamless interconnection with third-party drives, HMIs and sensors, supporting hybrid-brand automation system integration and incremental factory upgrades.

Industrial Application Scenarios

AllenBradley 1769-L33ER is widely deployed in medium-complexity discrete manufacturing scenarios, including high-speed packaging machinery, automated assembly lines, logistics sorting systems and multi-station intelligent processing equipment.

North American equipment OEMs adopt the controller for standardized mid-range automated machine design with high network stability requirements. Latin American manufacturing factories deploy 1769-L33ER for batch production line logic control and data monitoring. European automation projects rely on its large memory and multi-node networking capability to build stable, expandable industrial Ethernet control systems.