Description
Product Name : 1772-L2P Allen Braley Programmable controller
Product details:
The Allen-Bradley 1772-L2P is a legacy industrial processor from the PLC-2/15 family. While it is considered a “vintage” or “legacy” product in the 2020s, it remains a critical component for many existing manufacturing lines that rely on its proven reliability and simplicity.
Product Detailed Description
The 1772-L2P is a Mini-PLC-2/15 processor designed for small to medium-sized control applications. It functions as the “brain” of the control system, executing ladder logic programs to manage industrial machinery. It is typically housed in a 1771 Universal I/O chassis and communicates with various I/O modules to monitor inputs (sensors, switches) and control outputs (motors, valves).
Technical Parameters
| Feature | Specification |
| Model | 1772-L2P |
| Series | Mini-PLC-2/15 |
| Memory Capacity | Up to 2K (16-bit words) |
| Memory Type | RAM (Battery-backed) or EPROM |
| Max. I/O Capacity | 128 Inputs / 128 Outputs (Total 256) |
| Programming Port | 15-pin D-shell (compatible with 1770-T3 or PC-based software) |
| Scan Time | Typically 5ms to 15ms per 1K of program |
| Operating Temp | 0°C to 60°C (32°F to 140°F) |
| Battery Backup | Lithium battery for RAM data retention |
Product Advantages
- Proven Reliability: Known for operating in harsh industrial environments for decades without failure.
- Ease of Maintenance: The modular design allows for quick swaps if a unit fails, minimizing downtime.
- Deterministic Control: Provides consistent scan times for simple logic, ensuring predictable machine behavior.
- Compact Form Factor: The “Mini” designation allows it to fit into smaller enclosures compared to the larger PLC-2/30 systems.
Important Precautions & Considerations
⚠️ Note: This is a legacy product. Sourcing authentic replacement parts and finding engineers familiar with PLC-2 ladder logic is becoming increasingly difficult.
- Battery Maintenance: The RAM memory is volatile. If the internal battery dies while the power is off, the entire program will be lost. Always check the “Battery Low” LED.
- Compatibility: Ensure the firmware revision of the 1772-L2P is compatible with your existing I/O rack and communication modules (e.g., Data Highway).
- Electrostatic Discharge (ESD): Like all vintage electronics, the internal circuits are sensitive. Use grounding straps when handling the processor.
- Phase-Out Status: Since this is a discontinued model, it is highly recommended to plan a migration to modern platforms like Studio 5000 and CompactLogix.
Product Applications
The 1772-L2P is commonly found in the following legacy sectors:
- Material Handling: Control of conveyors, sorting systems, and basic palletizers.
- Packaging Machinery: Managing timing for filling, capping, and labeling machines.
- Food & Beverage: Simple batch processing and temperature control loops.
- Metal Fabrication: Operation of hydraulic presses and small-scale assembly lines.
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
Shipping Port: Xiamen, China
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