The 1756-L75 ControlLogix 5570 Processor Module from Rockwell Automation is a high-end industrial PLC/PAC controller designed for large-scale automation systems requiring very high memory capacity, fast deterministic execution, and advanced system scalability.
It is widely used in complex manufacturing plants, process industries, and infrastructure automation where large data handling, multi-task control, and long-term reliability are critical. The L75 represents one of the highest-capacity standard controllers in the ControlLogix 5570 family.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-L75 |
| Series | ControlLogix 5570 |
| Processor Type | PLC / PAC Controller |
| User Memory | 32 MB |
| I/O Memory | ~0.98 MB |
| Nonvolatile Memory | SD card (1784-SD1, expandable up to 2 GB) |
| Programming Port | 1 × USB 2.0 |
| Motion Support | Up to 100 axes |
| Maximum I/O Capacity | Up to 128,000 digital / 4,000 analog |
| Controller Connections | Up to 500 |
| Controller Tasks | Up to 32 tasks |
| Programs per Task | Up to 100 programs |
| Backplane Current (5.1V DC) | ~0.8 A |
| Backplane Current (1.2V DC) | ~5 mA |
| Power Dissipation | ~2.5 W |
| Battery / Energy Storage | 1756-ESMCAP module |
| Programming Software | RSLogix 5000 / Studio 5000 |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Weight | ~0.25–0.40 kg |
Physical Dimensions
- Size (H × W × D): 240 × 292 × 164.52 mm
The L75 is physically larger than lower-memory ControlLogix CPUs, reflecting its expanded processing and memory architecture for high-capacity industrial applications.
Recommended Related Models
For system expansion or modernization, the 1756-L75 is commonly paired with:
- 1756-L73 / 1756-L74 ControlLogix CPUs (lower memory variants)
- 1756-L7SP GuardLogix safety partner modules
- 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 / L62 legacy ControlLogix CPUs
- 1756-L63 / L64 / L65 high-memory 5560 controllers
- 1756-L71 / L72 / L73 / L74 / L75 5570 generation controllers
- 1756-L7SP GuardLogix safety modules
- 1756-EN2T high-speed Ethernet modules
These controllers form a scalable automation platform used in global industrial systems requiring high reliability and long lifecycle support.
