Product Overview
The Allen-Bradley 1756-L81ES GuardLogix 5580 Safety Controller combines standard and safety control in a single, powerful package. Designed for demanding industrial automation environments, this module delivers 3 MB of user memory and 1.5 MB of dedicated safety memory, ensuring reliable operation for both standard and safety-critical processes.
With integrated USB and Ethernet ports, the 1756-L81ES supports high-speed communication and seamless integration into existing ControlLogix systems. Its robust design and advanced diagnostic display make it a preferred choice for machine builders and end users seeking a scalable, high-performance safety controller.
Technical Specifications
Below are the key technical specifications for the Allen-Bradley 1756-L81ES, verified from the manufacturer's data:
| Specification |
Value |
| Brand |
Allen-Bradley / Rockwell Automation |
| Series |
ControlLogix |
| Part Number |
1756-L81ES |
| Product Type |
GuardLogix 5580 Safety Controller |
| Communication |
USB, Ethernet |
| Ethernet Communication Speed |
10 / 100 / 1000 Mbps |
| USB Communication Speed |
12 Mbps |
| Maximum Ethernet Nodes |
100 |
| Weight |
0.394 kg |
| Power Dissipation |
6.2 Watts |
| User Memory |
3 MB |
| Safety Memory |
1.5 MB |
| Nonvolatile Memory |
2 GB |
| Maximum I/O |
128,000 |
| Operating Temperature |
0 to 60 °C |
The 1756-L81ES supports up to 100 EtherNet/IP nodes, 256 EtherNet/IP connections (with 1756-EN2x), and various ControlNet configurations. For safety tasks, it supports Ladder Diagram only, while standard tasks support Ladder Diagram (LD), Structured Text (ST), Function Block Diagram (FBD), and Sequential Function Chart (SFC).
Real-World Applications
The Allen-Bradley 1756-L81ES is ideal for applications requiring both standard and safety control in a single controller. Typical use cases include:
-
Automotive Assembly Lines: Coordinate robotic cells and safety interlocks with high-speed EtherNet/IP communication.
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Packaging Machinery: Manage high-speed packaging processes while ensuring operator safety through integrated safety functions.
-
Material Handling Systems: Control conveyors and automated guided vehicles, with SIL 2 certified safety logic for hazard detection.
Its 128,000 maximum I/O capacity and 3 MB user memory make it suitable for large-scale applications that demand both performance and safety.
Installation & Setup Guidance
Install the 1756-L81ES into any compatible ControlLogix chassis, such as 1756-A4, 1756-A7, or 1756-A10. The module requires one empty slot. Use the integrated USB port for local programming and the Ethernet port for network connectivity. For safety tasks, program using Ladder Diagram only; for standard tasks, choose from LD, ST, FBD, or SFC in Studio 5000. Ensure proper grounding and follow standard ESD precautions during installation.
Maintenance & Reliability
The 1756-L81ES features an intuitive diagnostic display that provides real-time status and error messages, simplifying troubleshooting and reducing downtime. With a power dissipation of only 6.2 W and an operating temperature range of 0 to 60 °C, the module is designed for reliable operation in industrial environments. Regular inspection of the chassis cooling and network connections is recommended to maintain optimal performance.
Compatibility & Integration
The 1756-L81ES integrates seamlessly with the ControlLogix platform. It supports communication modules for ControlNet, DeviceNet, Remote I/O, DH+, and SynchLink. Compatible chassis include 1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K, 1756-A17, and 1756-A17K Series B/C. It also works with a wide range of power supplies, including 1756-PA50, 1756-PA72, and 1756-PB75. For redundancy applications, use compatible redundancy modules and power supplies like 1756-PA75R or 1756-PSCA2.
Selection Guide & Purchasing Advice
When selecting the Allen-Bradley 1756-L81ES, verify your system's memory and I/O requirements. Confirm that your chassis and power supply are compatible. For high-availability needs, plan for redundancy modules. The 1756-L81ES uses a removable memory card (1756-SD2) for program storage; ensure you have the correct memory card. PLC Source PRO offers genuine Allen-Bradley 1756-L81ES controllers with fast shipping and expert support. Contact us for availability and pricing.