The 1756-L73 ControlLogix 5570 Processor Module from Rockwell Automation is a high-performance PLC/PAC controller designed for complex industrial automation systems requiring fast execution speed, large memory capacity, and scalable multi-network integration.
It is widely deployed in manufacturing, process control, and infrastructure automation applications where deterministic performance, system reliability, and long lifecycle support are essential. The L73 is considered one of the most balanced high-memory controllers in the ControlLogix 5570 series.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-L73 |
| Series | ControlLogix 5570 |
| Processor Type | PLC / PAC Controller |
| User Memory | 8 MB |
| I/O Memory | ~0.98 MB |
| Nonvolatile Memory | 1 GB SD card (expandable up to 2 GB) |
| Programming Port | USB 2.0 |
| Maximum I/O Capacity | Up to 128,000 digital / 4,000 analog |
| Controller Tasks | Up to 32 tasks |
| Programs per Task | Up to 100 programs |
| Backplane Current (5.1V DC) | ~0.8 A |
| Power Dissipation | ~2.5 W |
| Programming Software | RSLogix 5000 / Studio 5000 |
| Battery / Energy Storage | 1756-ESMCAP module |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Weight | ~0.26–0.45 kg |
Physical Dimensions
- Size (H × W × D): 127 × 178 × 102 mm
This compact yet high-performance design allows the L73 to integrate into standard ControlLogix chassis systems while supporting large-scale control applications.
Recommended Related Models
For system expansion and modernization, the 1756-L73 is commonly paired with:
- 1756-L71 / 1756-L72 ControlLogix CPUs (lower memory variants)
- 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 high-memory 5560 controllers
- 1756-L71 / L72 / L73 5570 generation controllers
- 1756-L7SP GuardLogix safety partner modules
- 1756-EN2T advanced Ethernet modules
These controllers form a scalable automation foundation used across global industrial sectors.
