Product Details
Product Overview
The Allen-Bradley 1756-L81ES functions as a high-performance SIL 3/PLe capable processor within the ControlLogix 5580 family. This GuardLogix controller provides a unified solution for both standard and safety-critical control tasks, executing complex safety logic alongside general automation processes. We supply this unit as 100% Brand New and Original, ensuring your system benefits from the high-speed 1Gbps Ethernet port and the latest security firmware essential for modern smart manufacturing environments.
Technical Specifications
| Feature | Specification Details |
| User Memory | 3 MB |
| Safety Memory | 1.5 MB |
| Nonvolatile Memory | 2 GB (Ships with secure SD card) |
| Ethernet Speed | 10 / 100 / 1000 Mbps (Gigabit) |
| Maximum I/O Points | 128,000 |
| Maximum Ethernet Nodes | 100 |
| Safety Languages | Ladder Diagram (LD) Only |
| Standard Languages | LD, ST, FBD, SFC |
| Power Dissipation | 6.2 Watts |
| Weight | 0.94 lbs (0.43 kg) |
Engineering Advantages
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Integrated Safety and Motion: The 1756-L81ES eliminates the need for a separate safety partner for many SIL 2 applications, reducing chassis space and hardware costs. It manages high-speed integrated motion over EtherNet/IP, allowing engineers to synchronize safety functions directly with servo drive performance.
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Gigabit Performance for Data-Intensive Loads: The onboard 1Gbps Ethernet port facilitates rapid data exchange between the CPU and up to 100 nodes. This high bandwidth prevents network bottlenecks when executing complex safety interlocking across distributed I/O systems.
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Strict Safety Logic Enforcement: To maintain the highest integrity, the controller restricts safety tasks to Ladder Diagram (LD) only. This ensures that safety logic remains easy to audit and verify during third-party safety inspections or risk assessments.
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Energy-Efficient Thermal Design: With a low power dissipation of 6.2W, the 1756-L81ES minimizes heat buildup within the ControlLogix chassis. This design extends the lifespan of adjacent modules and allows for reliable operation in enclosures where airflow is limited.
FAQs
Q: Can I use Structured Text (ST) for safety logic in the 1756-L81ES? A: No. While the 5580 GuardLogix supports multiple languages for standard tasks, safety tasks strictly require Ladder Diagram (LD). This limitation ensures maximum visibility and adherence to safety programming standards.
Q: Is this unit a "Refurbished" or "Used" surplus module? A: Absolutely not. We guarantee this 1756-L81ES is 100% Brand New and Original. It ships in the manufacturer’s original factory-sealed box, which is critical for safety-rated components where operational history and component fatigue are major factors.
Q: Does this controller require a Safety Partner module? A: The 5580 series controllers, such as the 1756-L81ES, provide an "integrated" safety solution. For many SIL 2 applications, you do not need a separate safety partner, though high-level SIL 3 requirements may still dictate specific architecture configurations in Studio 5000.
Q: How do I backup the program without a permanent PC connection? A: The module includes a 2GB nonvolatile memory card. You can configure the controller to load the program from this SD card automatically upon power-up, ensuring the machine resumes operation immediately after a power cycle or CPU replacement.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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Essential Motion Control Commands: A Practical Guide for Engineers
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The Role of Intrinsic Safety Barriers in PLC and DCS Architectures
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