Omron Industrial Automation's D4NS tongue-operated safety door switch lineup includes three contact models with 2NC/1NO and 3NC contact forms and MBB models in addition to the previous contact forms, 1NC/1NO and 2NC. To save on labor and simplify replacement, M12 connector models are available. Standardized gold-clad contacts can be used with standard loads or microloads and provide high contact reliability, and a variety of metallic heads are available. D4NS safety switches are free of harmful lead, cadmium, and hexavalent chrome.