The Cutler Hammer EASY-E4-AC-12RCX1 is a reliable relay base unit designed for versatile control applications. Part of the EASY E4 series, this unit offers robust performance and is suitable for a wide range of industrial and commercial uses. Its compact design and compatibility with 100-240V AC/DC power make it an efficient choice for automation and control systems..The Cutler Hammer EASY-E4-AC-12RCX1 is a base unit for the EASY E4 series, operating with a power supply of 100-240V AC/DC. It is identified as a control device or control relay, potentially an automaton programmable (PLC).