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IEC/ EN 60073

IEC/ EN 60073

IEC 60073 lays out general rules for allocating particular meaning to visual acoustic and tactile indications so that safety of person/property can be enhanced. Apart from it, proper monitoring, control and maintenance of the equipment can be encouraged.

This standard is applied to:

  1. Single indicator light
  2. Push buttons
  3. Mechanical indicators
  4. LED’s or video display screens
  5. Safety of person, property is evolved and also where codes are used to facilitate the proper monitoring and controlling of equipment
  6. Where particular kind of coding is to be assigned by technical committee for a special function.

Meaning of color, shape & acoustic – general principal








Safety of person/ EnvironmentCondition of ProcessState of equipment
Red-Sweeping sound

-Bursts of sounds







YellowPattern of segments with constant level 






GreenContinuous sound with constant level 






BlueAlternate sound pitchMandatory Significance
White/grey/BlackOther soundsNo specific meaning assigned


There are 3 indication modes

  • Alerting
  • Indication
  • Confirmation


Acuator type 

Identified by colour



Non illuminating acuators
Emergency /normal (stop/off)RedExceptions are allowed when red color is not available.
STOP/OFFWhite,  grey blackRed can be used but green is not permitted
START/ONWhite, grey, blackGreen  can be used but red is not permitted
RESETBlue,  white black ,grey
Use of black and white specific meaningWhite, blackWhite –start/on

Black- stop/off

Illuminating Acuators
Type aHave the same colour wheather or not they are litFor indication
Type bHave a single colour when lit that is different from the colour when not lit and both colour have meaningFor confirmation
Type cHave more than one possible colour of lightning


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