This Harmony XB5, modular black key selector switch (key no.455) has 3 positions, operates with a stay-put mechanism with key withdrawal on the center position and uses screw clamp terminals. This key selector switch provides a versatile interface for controlling your machines. It is easily installed into standard 22mm diameter cut-outs and connected to your control circuits with simple screw-clamp connections. It provides a secure manner for authorized staff to switch between process or machine operating modes. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP69, making it ideal for operation in harsh environments. Its plastic bezel makes it ideal for applications requiring good resistance to chemical agents and/or double electrical insulation.