The safety relay ReLy EMSS1 is an evaluation unit for emergency stop pushbuttons and safety switches with volt free contacts. The safety relay must only be used within the limits of the prescribed and specified technical data and operating conditions at all times. Manual and Auto reset function External Device Monitoring (EDM) Reset Required indication Short safety distances owing to fast response times for compact machines and a high level of productivity Short maintenance times and low maintenance costs during module replacement thanks to plug-in terminals and the simple method of removing the safety relay from the mounting rail More space available in the control cabinet thanks to the slim housing Intuitive troubleshooting due to versatile diagnostics interfaces Easy wiring and installation – only one connection diagram required per module