Siemens Simatic S7-400 - Manual (Page 50)

General Technical Specifications
S7-400, M7-400 Programmable Controllers Module Specifications
1-22 A5E00069467-07
1.6.2 Use of the S7-400 in a Zone 2 Hazardous Area
Zone 2
Hazardous areas are divided up into zones. The zones are distinguished according
to the probability of the existence of an explosive atmosphere.
Zone Explosion Hazard Example
2 Explosive gas atmosphere
occurs only seldom and for a
short time
Areas around flange joints with flat
gaskets in pipes in enclosed spaces
Safe area No • Outside zone 2
• Standard distributed I/O
applications
Below you will find important information on the installation of the SIMATIC S7-400
in a hazardous area.
Further Information
You will find further information on the various S7-400 modules in the manual.
Production Location
Siemens AG, Bereich A&D
Östliche Rheinbrückenstraße 50
76187 Karlsruhe
Germany
Certification
II 3 G EEx nA II T3 .. T6 in accordance with EN 50021 : 1999
Test number: KEMA 03ATEX1125 X
Note
Modules with II 3 G EEx nA II T3 .. T6 certification can only be used in
SIMATIC S7-400 automation systems belonging to equipment category 3.