This Harmony 9001K standard contact block uses screw terminals and has 1 x normally open contact. It is compatible with the push buttons and switches of Harmony 9001K. This contact block allows for quick and easy replacement and configuration of your push buttons and selector switches. It is easy to install and replace in the complete 9001K push button units and switches, connecting to control circuits via simple screw terminal connections. The clear color of the cover allows the user to visually identify it from a distance. With an IP20 protection rating, it protects the operator from unexpected contact with live electrical circuits.