The Harmony XB4/ZB4 series made of metal offers a wide range of 22 mm and 30 mm control and signaling devices, including push buttons, indicator lights, and selector switches, as well as emergency stop switches. Thanks to the modular design of the devices, all components can be obtained as individual elements, in assemblies, or as complete units. Due to their quality, flexibility, and extreme robustness (protection classes up to IP69K), these devices are ideal for most applications in industry and buildings. This auxiliary contact block is compatible with the 22 mm and 30 mm devices and features one normally open contact. The connection of the auxiliary contact block is made via screw terminals. Mounting is done using a shock-resistant connection screw. Delivery is in bulk packaging. In addition to high vibration resistance and a very long lifespan, the XB4/ZB4 series devices also stand out due to their extremely high possible ambient temperature. Due to the numerous existing product standards and certifications, they are suitable for international use. Thanks to the Green Premium label, you can obtain detailed information on material contents, environmental impacts, and circular economy, which support your sustainability goals.