PLC vs Arduino: Why CE / UL certification matters in U.S. factories Using CE or UL-certified PLCs isn’t just about compliance—it directly impacts factory safety, insurance approval, and liability risk. Unlike hobbyist controllers, certified industrial PLCs meet strict electrical and safety standards required by insurance companies and inspectors. The certification label proves your equipment is approved for industrial use. #PLC #IndustrialAutomation #ULCertification #CECertification #FactorySafe