IEC 60073 provides the universal rules for assigning meanings to visual, acoustic, and tactile signals. Whether you are designing a simple push-button or a complex SCADA screen, this standard ensures that an operator can immediately recognize a machine's state and know exactly how to respond.
The standard read like a hymn for clarity. Colours and shapes, meanings and priorities: red for danger, yellow for caution, green for safe; a triangle for warning, a circle for normal; a buzzer for attention, a steady tone for confirmation. It wasn’t just aesthetics. It was survival distilled into guidelines—how a single symbol could shorten reaction times in a control room, how standardized signals could prevent a cascade of errors when languages and cultures mixed. iec 60073 pdf
(flashing) are used to attract urgent attention. IEC 60073 specifies two flashing speeds: Normal (High Priority): 84–168 flashes per minute. Slow (Low Priority): 24–48 flashes per minute. 2. Acoustic Coding IEC 60073 provides the universal rules for assigning