This Harmony 9001K emergency stop / shutdown 30mm mushroom head modular red button has 2 positions, operates with a locked twist to unlock. It has a chrome plated metal bezel and 2 x normally closed + 2 x normally open contacts. It is supplied with switching element and has screw terminals. This emergency stop / shutdown button, also called EMS (Emergency Machine Stop) and EMO (Emergency Off), is easy to install in a standard 30mm diameter cutout. Connection via simple screw terminal connections. A clear color and distinctive 40mm mushroom shape make it visually easy to see from a distance. Thanks to its IP66 protection rating, it is shockproof, dustproof, waterproof and vibration resistant, making it ideal for use in harsh environments.