The 1756-L65 ControlLogix 5560 Processor Module from Rockwell Automation is a high-end industrial PLC controller designed for complex automation environments that demand very large memory capacity, strong deterministic performance, and extensive system scalability.
As one of the most powerful controllers in the ControlLogix 5560 series, the L65 is widely used in large manufacturing plants, utilities, and process industries where data-heavy control logic and long lifecycle stability are essential. Although now discontinued, it remains a critical part of many installed legacy systems worldwide.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-L65 |
| Series | ControlLogix 5560 |
| Processor Type | PLC / PAC Controller |
| User Memory | 32 MB |
| I/O Memory | 478 KB |
| Maximum I/O Capacity | 128,000 digital / 4,000 analog |
| Controller Connections | Up to 250 |
| Serial Port | RS-232 (DF1, ASCII, DH-485) |
| Nonvolatile Memory | 1784-CF128 CompactFlash (optional) |
| Redundancy Support | Supported |
| Tasks Supported | Up to 32 tasks |
| Programs per Task | Up to 100 |
| Backplane Current (5.1V DC) | ~1.2 A |
| Backplane Current (24V DC) | ~14 mA |
| Power Dissipation | ~3.5 W |
| Programming Software | RSLogix 5000 |
| Battery | 1756-BA2 lithium battery |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Dimensions (H × W × D) | 13.3 × 5.5 × 22.0 cm |
| Weight | ~0.49 kg |
The L65 is physically similar to other L6x controllers but typically associated with higher memory configurations, making it suitable for very large automation programs and data-intensive control strategies.
Recommended Related Models
For system upgrades or expansion, engineers commonly pair the 1756-L65 with:
- 1756-L71 / L72 ControlLogix 5570 CPUs (modern replacement path)
- 1756-EN2T EtherNet/IP communication module
- 1756-ENBT Ethernet bridge module
- 1756-CNB ControlNet bridge module
- 1756-IB16 / 1756-OB16 digital I/O modules
Popular Allen-Bradley ControlLogix Models
Within the same ecosystem, widely used controllers include:
- 1756-L61 mid-range CPU
- 1756-L62 high-memory processor
- 1756-L63 large-memory controller
- 1756-L64 extended-performance CPU
- 1756-L71 / L72 modern ControlLogix controllers
These models represent the evolution of ControlLogix systems from legacy high-memory control toward modern high-speed industrial automation platforms.
