Overview
The Allen-Bradley 1772-LI is a slot mount processor control module designed for integration into PLC-2 industrial automation systems. As part of the proven 1772 series, this processor module provides core computation and logic execution for legacy automation applications. The 1772-LI operates with LP2 firmware revision F, ensuring stable control for established manufacturing and process control environments.
Key Features
- Slot mount design for direct installation into 1772 series I/O chassis
- LP2 firmware (revision F) for reliable processor operation
- Operates within standard 10–32V DC industrial supply range
- Compatible with Allen-Bradley 1772 I/O modules and accessory boards
- Conformal coating provides protection in industrial environments
- Status monitoring and diagnostic indicators for fault identification
Technical Specifications
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Model: 1772-LI
- Type: Slot Mount Processor Control Module
- Firmware: LP2 (Revision F)
- Operating Voltage: 10–32V DC
- Series: 1772 PLC-2
- Form Factor: Single slot PCB module
- Environment: Conformal coated for industrial use
Typical Applications
The 1772-LI processor module is commonly used in:
- Machine tool and CNC control systems
- Material handling and conveyor automation
- Production line sequencing and logic
- Batch process monitoring and control
- Legacy system restoration and equipment upgrade paths
Compatibility & Replacements
The 1772-LI integrates with standard Allen-Bradley 1772 series I/O chassis and accessory modules. When replacing or upgrading, verify power supply compatibility (10–32V DC input) and confirm proper firmware revision for your application. Related processor models in the 1772 family include the 1772-LG, 1772-LN2, and 1772-LS, which offer alternative feature sets and memory configurations. For modern control applications, migration to CompactLogix or ControlLogix platforms may be considered. Consult technical documentation or contact your Rockwell distributor for module interchangeability details.
