This Easy Harmony XB2, single contact block uses screw clamp terminals. This contact block allows fast and easy replacement and configuration of your push buttons and selector switches. It is easily installed and replaced on XB2 complete push-button units and selector switches via a screw assembly and connects to control circuits with simple screw-clamp connections. It protects operators from unexpected contact with live circuits thanks to its IP20 protection index. It is rated for 3 million mechanical cycles and 1 million electrical cycles, ensuring less maintenance and downtime in your installation. Vibration resistant screw clamp connection terminals ensure high vibration resistance making product suitable installation on high impact machines.