All Emergency Stop Push Buttons are designed to avert arising or to reduce existing hazards to person, damage to machinery or to work in progress
It is also to be initiated by a single human action when the normal stopping function is inadequate for this purpose
They may all arise from： Functional irregularities （malfunctioning of the machinery, unacceptable properties of the processed material, human errors） Normal operation The Harmony XAP range is designed for O 22 mm control and signalling units
There is IP degree of protection, which covers the following： IP65 conforming to IEC 60529 IP657 conforming to NF C 20-010 The air temperature for these XAP range oscillate from -40°C to 70 °C
Colours and their appearance is regulated by EN/IEC 60947-5-5, EN/IEC 60204-1, and EN ISO 13850, which states clearly that buttons used as actuators of an emergency stop devices shall be coloured red
When a background exists behind the actuator, and as far as it is practicable, it shall be coloured yellow
It is the responsibility of the designer and installer to know the applicable standards, safety requirements, codes, laws and other regulations.
