E3H2-R2C4M-M1 is an Omron Safety Relay, which is digital input and output devices used to monitor and control safety functions in an automated system. It features 3 safety inputs, 2 normally-open contacts and 4 normally-closed contacts for the 4 monitored safety functions, and a manual reset. The M1 version is designed for UL, CSA, and TÜV certification.