The SK-Series Control Relay is designed to be used in conjunction with safety elements such as Safety Contact Mats, Safety Contact Edges or Safety Contact Bumpers. The SK series relay utilized a current principle for monitoring the safety contact elements. This method of monitoring makes certain that the high demands for fault recognition as well as for safety are met. Relay switch status along with operating voltage status is displayed via LED’s. SK Series Relays are available in a variety of models depending on the application and conform to safety categories 2 and 3, EN 954-1 and are certified.