This contact block is a separate component of the range of control and signaling units, Harmony 9001K / 9001SK diameter 30mm. It is compatible with Harmony 9001K or 9001SK push buttons and switches. It uses screw-clamp terminals and has 1 x NC contact. This contact block allows fast and easy replacement and configuration of your push buttons and selector switches. It features power reed contact operation. It weighs 45g. The 30 mm Harmony range offers a large choice of robust and reliable products to meet a great number of applications in heavy industries such as petrochemy, metallurgy, mining oil and gas wastewater treatment, automobile manufacturing. It is UL listed and CSA certified, CE declaration of conformity and RoHS compliant.