The 1756-L85E ControlLogix 5580 Processor Module from Rockwell Automation is a top-tier industrial PLC/PAC controller designed for high-performance automation systems requiring very large memory capacity, integrated Gigabit Ethernet, advanced motion control, and strong cybersecurity features.
It sits at the upper end of the ControlLogix 5580 standard (non-safety) lineup and is widely used in large-scale smart factories, automotive manufacturing, high-speed packaging systems, and complex distributed control architectures where maximum processing headroom is required.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-L85E |
| Series | ControlLogix 5580 |
| Processor Type | PLC / PAC Controller |
| User Memory | 40 MB |
| I/O Capacity | Up to 128,000 digital / 4,000 analog |
| Controller Tasks | Up to 32 tasks |
| Programs per Task | Up to 1000 programs |
| Motion Control | Up to 256 axes |
| Communication Ports | 1 × USB 2.0, 1 × Embedded EtherNet/IP |
| Ethernet Speed | 10/100/1000 Mbps (Gigabit) |
| Device Capacity | Up to ~300 EtherNet/IP devices |
| Security Features | Signed firmware, role-based access control |
| Programming Software | Studio 5000 Logix Designer |
| Backplane Current (5.1V DC) | ~1.20 A |
| Current (1.2V DC) | ~5 mA |
| Power Dissipation | ~6.2 W |
| Isolation Voltage | 50 V continuous |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Weight | ~0.20–0.44 kg |
Physical Dimensions
- Size (H × W × D): 145.2 × 136.6 × 136.6 mm
This compact single-slot design integrates high memory capacity and embedded Ethernet, reducing the need for external communication modules and simplifying high-density system architecture.
Recommended Related Models
For scalable system design, the 1756-L85E is commonly paired with:
- 1756-L84E / 1756-L83E ControlLogix 5580 CPUs
- 1756-L8SP GuardLogix safety partner modules
- 1756-IB16 / 1756-OB16 digital I/O modules
- 1756-IF8 / 1756-OF8 analog I/O modules
- 1756-PB75 / 1756-PA75 power supply modules
Popular Allen-Bradley ControlLogix Models
Within the same ecosystem, widely used controllers include:
- 1756-L71 / L72 / L73 ControlLogix 5570 CPUs
- 1756-L73S GuardLogix safety controllers
- 1756-L81E / L82E / L83E ControlLogix 5580 CPUs
- 1756-L84ES / L83ES GuardLogix safety CPUs
- 1756-L85E high-memory flagship controller
These controllers support scalable architectures from machine-level automation to enterprise-scale industrial systems.
