AB 1756-L71S

The Allen‑Bradley 1756‑L71S is a GuardLogix® 5571S safety controller from the ControlLogix® family, engineered to deliver both high‑performance standard automation and SIL 3‑rated safety control on a single integrated platform . As part of Rockwell Automation's Integrated Architecture™ system, this controller uses the Studio 5000 Logix Designer® environment and common network protocols, making it ideal for applications that demand rigorous safety compliance alongside complex machine control . The 1756‑L71S features a dual‑processor safety architecture that combines a primary controller with a 1756‑L7SP safety partner module. The safety partner is automatically configured and requires no separate setup or download, simplifying system integration . With no lithium battery required—the controller uses a 1756‑ESMCAP Energy Storage Module instead—maintenance is simplified and battery replacement concerns are eliminated.