Siemens SIPART Series Operating Instructions Manual page 286

Glossary
SIMATIC software
Programs for process automation (e.g. PCS7, WinCC, WinAC, PDM, Step7).
Zone 0
Area in which hazardous potentially explosive gaseous atmospheres build up often, regularly
or over long durations during the normal operation of a device.
Zone 1
Area in which potentially explosive gaseous atmospheres build up occasionally during the
normal operation of a device.
Zone 2
Area in which a potentially explosive gaseous atmosphere normally never builds up or builds
up only for a short while during normal operation of a device.
Zone 22
Zone 22 is an area in which a potentially explosive gaseous atmosphere in the form of a
cloud of combustible dust in air never develops or develops only for a short while during
normal operation.
284
SIPART PS2 with and without HART
Operating Instructions, 10/2013, A5E00074631-11