This is a Non-Illuminated Key Switch with key operator, round signalling unit head, Ronis 455 key lock and 3-position ±45° operator position, suitable for use with the Harmony XB4/ZB4 metal push buttons.

• · This Harmony XB4, black head with key (key no.455) 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.