Iec 60073 Pdf -

For example, the standard dictates that a red actuator (button) should be used exclusively for stopping or emergency functions, while a green actuator implies starting or enabling a function. A flashing yellow light indicates a warning or abnormal condition requiring attention.

The standard assigns four primary colors for basic status, plus two auxiliary colors. iec 60073 pdf

| Color | Meaning (for indicators) | Meaning (for actuators) | |-------|--------------------------|--------------------------| | Red | Emergency, fault, danger condition requiring immediate action | Emergency stop, stop/off (mains disconnect) | | Yellow/Amber | Warning, abnormal condition, attention needed before a fault occurs | Acknowledge, restart after trip, return to normal | | Green | Safe, normal operation, ready | Start, on (mains connect), enable | | Blue | Mandatory action, operator intervention required (e.g., reset after override) | Reset, auxiliary function (not start/stop) | | White | Neutral information (power present, general data) | General actuation (no specific safety meaning) | | Black/Grey | Not preferred for safety – used only where color coding is impractical | Same – not for safety-critical functions | For example, the standard dictates that a red

Critical rule: Red and green must never be used together as the only means of distinction for color-blind operators (approx. 8% of males). Redundant coding (position, shape, label) is required. The standard assigns four primary colors for basic