Allen‑Bradley 1769-L23E-QB1B CompactLogix Controller

The Allen‑Bradley 1769-L23E-QB1B is an integrated CompactLogix programmable automation controller built for small and medium-scale automation projects. It combines embedded digital I/O points, processor unit and Ethernet communication interface into one compact module to execute automatic control logic.

This controller features built-in 16 digital inputs and 16 digital outputs, supporting expansion of additional 1769 series I/O modules. It uses EtherNet/IP protocol for networking with HMIs, drives and other controllers, widely used for equipment renovation, production line upgrades and spare part replacement.

Main Specifications

• Brand: Allen‑Bradley (Rockwell Automation)
• Model: 1769-L23E-QB1B
• Product Type: CompactLogix Integrated PAC Controller
• Embedded I/O: 16 DI / 16 DO, 24VDC discrete signals
• Communication: 10/100Mbps EtherNet/IP port
• Support expansion of 1769 series I/O modules
• Programming software: Rockwell Studio 5000 Logix Designer
• Operating Temperature Range: 0°C ~ +60°C
• Support peer-to-peer communication and tag-based data access
• Installation: DIN rail mounting for industrial control cabinets

Core Functions

• Cyclically execute control programs including ladder logic, structured text and FBD instructions
• Collect field switch signals and output drive commands to solenoid valves and actuators
• Realize data exchange with touch screens, inverters and remote controllers via EtherNet/IP
• Support online program download, monitoring and real-time parameter adjustment
• Built-in hardware diagnosis to detect I/O faults, short circuits and communication exceptions
• Store production parameters, alarm records and event timestamps for fault tracing
• Flexible I/O expansion layout adapts to different automation equipment demands
• Industrial anti-interference design ensures stable long-term unattended operation
• Compact DIN rail structure effectively saves internal cabinet installation space
• Standardized hardware facilitates rapid replacement during equipment maintenance

Application Scenarios

• Packaging machinery, conveyor and material handling automation control systems
• Food, beverage and plastic processing production line control cabinets
• Sewage treatment, water supply and environmental protection equipment automation units
• Small assembly equipment, testing machinery and automatic workstation control racks
• Auxiliary equipment control for mining, construction and logistics industries
• HVAC, pumping stations and small-scale factory utility control systems
• Printing machinery, textile equipment and metal processing automation devices
• Automobile auxiliary production equipment and semi-automatic assembly lines
• Upgrade and reconstruction of legacy CompactLogix automation control systems
• Industrial PAC spare parts maintenance and emergency replacement projects