The 1756-L81ES GuardLogix 5580 Safety Controller from Rockwell Automation is a next-generation safety-integrated PLC/PAC designed for advanced industrial systems requiring high-speed control, embedded Ethernet communication, and SIL-rated functional safety in a single controller platform.
It is part of the ControlLogix 5580 GuardLogix family and is widely used in smart factories, robotics safety systems, and process industries where both performance and certified safety execution are essential.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-L81ES |
| Series | ControlLogix 5580 GuardLogix |
| Processor Type | Safety + Standard Integrated CPU |
| Standard Memory | 3 MB |
| Safety Memory | 1.5 MB |
| Communication Ports | 1 × USB, 1 × Embedded EtherNet/IP |
| Ethernet Speed | 10/100/1000 Mbps (Gigabit) |
| Maximum 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 | Supported (system-dependent) |
| Security Features | Signed firmware, role-based access control |
| Backplane Current (5.1V DC) | ~1.20 A |
| Current (1.2V DC) | ~5 mA |
| Power Dissipation | ~6 W |
| Programming Software | Studio 5000 Logix Designer |
| Display | 4-character alphanumeric status display |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Weight | ~0.25–0.65 kg |
Physical Dimensions
- Size (H × W × D): 145.2 × 34.55 × 136.6 mm
This compact single-slot design integrates embedded Ethernet while maintaining full ControlLogix chassis compatibility, making it suitable for modern connected industrial systems.
Recommended Related Models
For system expansion or migration, the 1756-L81ES is commonly paired with:
- 1756-L82ES / 1756-L83ES higher-memory GuardLogix 5580 CPUs
- 1756-L8SP safety partner modules
- 1756-EN2T EtherNet/IP communication modules (legacy expansion)
- 1756-IB16 / 1756-OB16 digital I/O modules
- 1756-IF8 / 1756-OF8 analog I/O modules
Popular Allen-Bradley ControlLogix & GuardLogix Models
Within the same ecosystem, widely used controllers include:
- 1756-L71 / L72 / L73 ControlLogix 5570 CPUs
- 1756-L73S GuardLogix 5570 safety controllers
- 1756-L81E / L81ES / L82E / L83E ControlLogix 5580 CPUs
- 1756-L8SP safety partner modules
- 1756-EN2T Ethernet communication modules
These platforms support scalable architectures from discrete automation to safety-critical smart manufacturing systems.
