Siemens Simatic S7-400 User 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.