Allen Bradley 1768-L43S Compact GuardLogix Safety Processor SIL3-certified industrial safety PLC controller — where safety meets performance in a single, unified platform. SIL3 Certified Compact GuardLogix Integrated Safety Studio 5000 Compatible A New Standard in Integrated Safety The 1768-L43S represents a paradigm shift in how manufacturers approach machine safety. Rather than relying on separate safety relays, dedicated safety controllers, and fragmented architectures,