What is the functional relationship between the stop functions in electrical and pneumatic systems?
DIN EN 60204-1:1993 (simultaneously known as VDE-0113), Electrical equipment on machines, sets out stop functions for electrical systems. There are the following three categories of stop functions: Category 0: Shutdown by immediately turning off the energy supply to the machine drives (i.e. uncontrolled shutdown); Category 1: Controlled shutdown, where the energy supply is only disconnected when the machine has stopped; Category 2: Controlled shutdown, where the energy supply to the machine components is maintained. Every machine must be equipped with a category 0 stop function. Category 1 and/or 2 stop functions must be provided if this is necessary for the safety and/or functional requirements of the machine. Category 0 and category 1 stops must be functional regardless of the operating mode and a category 0 stop must take priority.* The following assignments can be made for pneumatics: Category 0: Turn off compressed air and electrical power; Category 1: Use of clamping unit or clam
