Description
Product Name : 1772-LI Allen Braley Programmable controller
Product details:
The Allen-Bradley 1772-LI is a Processor Interface Module specifically designed for use within the legacy PLC-2/30 and PLC-2/20 controller systems. It serves as a critical communication bridge, allowing the processor to interact with remote I/O chassis and other peripheral devices.
Product Parameters
| Feature | Specification |
| Manufacturer | Rockwell Automation / Allen-Bradley |
| Product Series | PLC-2 System |
| Model Number | 1772-LI |
| Module Type | Processor Interface / I/O Adapter Module |
| Communication Protocol | Proprietary Allen-Bradley Remote I/O (RIO) |
| Data Rate | 57.6 kbaud (Standard for PLC-2 era) |
| Mounting | 1771 I/O Chassis |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Status Indicators | LED indicators for Run, Fault, and Communication status |
Product Advantages
- System Reliability: Proven track record in industrial environments for decades, offering high stability in heavy-duty manufacturing.
- Seamless Integration: Designed specifically to slide into the standard 1771 universal I/O chassis, ensuring a perfect mechanical and electrical fit for PLC-2 setups.
- Simplified Troubleshooting: Includes built-in LED diagnostics that allow technicians to quickly identify power, processor, or communication link failures without complex tools.
- Modular Architecture: Facilitates easy replacement and maintenance, minimizing downtime in legacy production lines.
Key Applications
The 1772-LI is primarily found in aging industrial installations where PLC-2 systems are still operational. Common applications include:
- Material Handling: Coordinating conveyor belts and sorting systems in warehouses.
- Automotive Assembly: Managing legacy robotic arms and assembly line sequencing.
- Food and Beverage: Controlling basic mixing, bottling, and packaging processes.
- Legacy Upgrades: Acting as a placeholder or interface during phased migrations from PLC-2 to newer ControlLogix systems using specialized conversion kits.
Important Considerations & Precautions
- Lifecycle Status: The 1772-LI is a discontinued/obsolete product. It is no longer in active production by Rockwell Automation. New units are generally unavailable; most are refurbished or “new old stock.”
- Static Sensitivity: Like all electronic modules of its era, it is highly sensitive to Electrostatic Discharge (ESD). Always use a grounding strap when handling the module.
- Power Down Requirement: Never insert or remove the 1772-LI module from the 1771 chassis while the backplane power is ON. This can cause permanent damage to the processor or the interface circuitry.
- Backup and Documentation: Since these systems are legacy, ensure that PLC programs are backed up frequently. Finding software (like 6200 series or AI) and hardware interfaces (like the 1770-KF2) to communicate with these modules is increasingly difficult.
- Modern Alternatives: If your 1772-LI fails, consider this an opportunity to evaluate a system migration. Modern PLCs offer significantly higher speeds, better security, and Ethernet/IP connectivity.
Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!
We have the same series of models in stock. If you don’t find the model you need, please contact us and we will provide you with an official quotation！
Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: Sweden
Price: Please contact us Product weight：0.515kg
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