Schneider Electric Harmony XAP Push Button Control Station -

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 Ø 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.

•1 hole with blanking plug for cable gland <= 14 mm

•1 hole without blanking plug for cable gland <= 14 mm

A general-purpose push button switch is used for controls, e.g. to start machine operation or simply to switch modes. An emergency stop push button switch however, is mainly used as a safety measure to stop hazardous events.

How can I avoid pressing on the 22 diameter emergency stops when not necessary?

Option to be considered is to retrofit metal guards, which can be found under ZBZ160 category for 40 mm diameter emergency stops.

What is Trigger Action?

A standard operator can be teased enough to open a normally closed contact without latching into the depressed position. Trigger action units are spring loaded so they only depress the contact block after it latches into the depressed position.