The Werma 840.400.00 is a robust push button module featuring a built-in LED indicator and a maintained (latching) switch designed for use within AndonCONTROL visual signaling systems. Operating at 24 V DC, this module allows operators to activate signals that remain on until manually reset, ideal for signaling continuous conditions such as machine faults or status holds. The integrated LED provides immediate visual feedback of the button’s status. The compact and ergonomic design fits easily into modular signal stacks or workstation panels. With an IP65-rated housing, it offers reliable protection against dust and water ingress, ensuring long-lasting performance in industrial settings. Key Features: • Maintained (latching) push button with integrated LED indicator • Operating voltage: 24 V DC • Designed for modular AndonCONTROL systems • Compact ergonomic design for easy integration • IP65 protection against dust and moisture • Provides continuous status signaling until reset • Suitable for production lines, machinery monitoring, and operator alerts