This Harmony XB4, black head with key (key no.421E) for key selector switch has 3 positions, operates with spring-return-to-center mechanism with key withdrawal on center position. This head with key provides a versatile interface for controlling your machines. It is easily installed and replaced on compatible complete key selector switch units to provide 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 IP66. It has a metal bezel, this makes it Ideal for applications requiring high impact and vibration resistance. It is designed to fit in a standard 22mm cutout, ensuring compatibility when installing in pre-existing machinery. Secure machine and system operation with a key, only available to authorized operators. Its wide range of operating temperatures from -40°C to 70°C allows versatility in usage of product. Key removal allowed in only one of the positions, allowing for advanced interlocking between various parts of a machine or process, while limiting human errors. Specifications Main Range of Product Harmony XB4 Product or Component Type Head for key selector switch Device short name ZB4 Bezel material Chromium plated metal Mounting diameter 0.9 in (22 mm) Head type Standard Sale per indivisible quantity 1 Shape of signaling unit head Round Return To centre Operator profile Black key switch Type of operator Spring return Operator position information 3 positions +/- 45° Type of Keylock Key 421E Key withdrawal position Center Complementary CAD overall width 1.1 in (29 mm) CAD overall height 1.1 in (29 mm) CAD overall depth 2.8 in (72 mm) Net Weight 0.216 lb(US) (0.098 kg) Resistance to high pressure washer 1015.3 psi (7000000 Pa) 131 °F (55 °C) 0.1 m Mechanical durability 1000000 cycles Electrical composition code C3 6 single front mounting C4 6 single and double front mounting C5 5 single front mounting C6 5 single and double front mounting C7 4 single front mounting C8 4 single and double front mounting C11 3 single front mounting Device presentation Basic element