Humans depending on the activity with the machine need to select the machine working mode and as a consequence the safety protective stop to protect them
Key sequence and trapped key, machine designers needs to create a safe sequence with key access to operate with machines
What is operation selector mode
How to select the appropriate combination of devices and functions
How to combine the switch properly
This video shows how to combine the dangerous movements with the enabling device, movement instructions and their power
video 2:30 mins