1769-L35CR

Overview of Allen Bradley 1769-L35CR

The Allen Bradley 1769-L35CR is a CompactLogix controller offering solid performance and flexibility for mid-sized automation tasks. With a ControlNet network interface, this processor is designed to manage distributed I/O and high-speed data exchange in demanding industrial settings. The 1769-L35CR features a memory capacity of 1.5 MB, supporting storage and execution of complex user programs for applications requiring reliable logic control and data handling. Operators appreciate its multiple interfaces, including a dedicated RS-232 serial port, ControlNet port, redundant communication port, and NAP (Network Access Port) for robust network integration. The open-frame design allows easy DIN rail mounting, saving panel space. Integrated LED indicators provide clear status feedback for maintenance and operation. The 1769-L35CR supports basic and advanced programming languages—ladder, function block, sequential function chart, and structured text—enabling versatile automation control. It can bridge data across networks, storing application configurations locally or on an optional CompactFlash card, making it a dependable core for industrial control applications.

Key Features of Allen Bradley 1769-L35CR

• 1.5 MB user memory for sophisticated logic applications
• Supports up to 30 I/O modules in 3 I/O banks with 2 expansion cables
• ControlNet interface for high-speed networked automation
• Embedded RS-232 serial port and redundant channel
• Open enclosure, DIN rail or panel mountable
• Expansion via CompactFlash for data storage and recovery
• On-board status LEDs for fast diagnostics
• Compatible with multiple IEC 61131-3 programming languages

Technical Specs of 1769-L35CR

• Memory: 1.5 MB user
• Max I/O modules: 30 (in 3 banks)
• Communication ports: 1 x RS-232, 2 x ControlNet (redundant), 1 x NAP
• Backplane current: 680 mA @ 5V DC; 40 mA @ 24V DC
• Power dissipation: 4.36 W
• Isolation voltage: 30V (continuous); type tested at 710V DC for 60 s
• Operating temperature: 0 to 60°C
• Weight: Approx. 0.32 kg (0.70 lb)
• Mounting: DIN rail or panel mount
• Replacement battery: 1769-BA

Applications / Use Case

The Allen Bradley 1769-L35CR is used in manufacturing plants, process automation, and OEM machinery where distributed I/O and networked control are necessary. It is ideal for applications demanding reliable data exchange and logic execution across multiple devices and systems, such as packaging, material handling, batch processing, and transportation systems. Its ControlNet interface ensures seamless coordination between controllers, intelligent devices, panels, and field I/O, minimizing downtime and facilitating real-time adjustments. Facility engineers leverage its flexibility for scalable solutions—configuring the controller for machine-level logic or integrating it into plant-wide automation architectures. The 1769-L35CR is chosen when system expansion, robust communication, and user-friendly programming are required, supporting efficient commissioning, diagnostics, and maintenance activities.

Related Resources

• LeadTime.ca – Industrial Automation Components & Repair Services
• View All Allen Bradley Products
• Top PLC Brands Compared: Siemens, Allen Bradley & Mitsubishi
• Allen Bradley 5069-L320ER CompactLogix Controller
• Allen Bradley 1769-OF8 Analog Output Module