What is difference between "Emergency stop operaton" and "Emergency switching off" operation of Emergency stop push-button
Emergency stop operation is “an emergency operation intended to stop a process or a movement that has become hazardous”. It is part of the emergency stop function system of the machine.
Emergency switching off operation is “an emergency operation intended to switch off the supply of electrical energy to all or part of an installation where a risk of electric shock or another risk of electrical origin is involved ". It is directly linked to risk of electrical origin, related to the machine or not.
For Emergency Stop Trigger Action Pushbutton, yellow color Circular legend with triangular marks must be always there which indicates the conformity to standard EN/IEC 60204-1 and EN/ISO 13850:2006
Emergency Switching off Pushbutton, user can select circular legend without triangular marks.