The S1 is a 22mm non-illuminated metal selector switch operator used for industrial control applications. It features a durable metal construction certified for NEMA Type 4X and 12 environments, ensuring reliability in harsh conditions. The operator has an above-panel height of 27mm and can be configured with up to six switch contact circuits, which are sold separately. Contact blocks are available with self-wiping silver or gold-plated contacts. This modularity makes the S1 a versatile solution for various machine control and automation systems.