When indicators use auditory buzzers or sirens alongside visual lights, IEC 60073 dictates the nature of the pulse:
Its primary objective is to reduce human error. By standardizing how machines display status information and how operators interact with controls, the standard: Increases operational safety in hazardous environments. Accelerates operator response times during emergencies. Simplifies the training process for technical personnel.
This multi-layered approach ensures that safety information remains accessible and unambiguous regardless of the specific conditions in which equipment operates. iec 60073 pdf
The formal title of the standard is "Basic and safety principles for man-machine interface, marking and identification - Coding principles for indicators and actuators."
In the complex world of industrial automation and human-machine interface (HMI) design, clear and consistent communication between equipment and operators is paramount to safety and efficiency. At the heart of this communication lies the standard—a critical framework that defines how indicators and actuators (controls like buttons and switches) should communicate their status and intended actions through visual, acoustic, and tactile signals. When indicators use auditory buzzers or sirens alongside
Green simply denotes a safe, normal state of operation or environment requiring no immediate action. It's essential to recognize green as a rather than a warning color:
I’m designing a control panel and need to double-check the flashing rates and colour meanings for pushbuttons vs. indicators per . Simplifies the training process for technical personnel
: Use of tone, frequency, and duration of sound signals to convey urgency.
for your control panel.