Siemens Simatic S7-400 - Manual (Page 45)

General Technical Specifications
1-17
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Ambient Climatic Conditions for the M7-400
The M7-400 may be used under the following ambient climatic conditions:
Table 1-15 Ambient Climatic Conditions for the M7-400
Climatic Condi-
tions
Permitted Range Remark
Temperature 0 to +60
°
C
5 to +55 ° C
5 to +40 ° C
When using a CPU 486-3 or 488-3
When using an MSM 478 without
diskette operation but with ventila-
tion
When using an MSM 478 with
diskette operation or without
ventilation
(when using an ATM 478, the
permissible temperature range is
restricted by the AT module used)
Relative
humidity Max. 95 % No condensation, corresponds to
RH stressing level 2 in accordance
with IEC 61131-2
Atmospheric
pressure 1080 to 795 kPa (corresponds to
a height of -1000 to 2000 m) Note the restriction on the power
supply in Table 1-12.
Concentration of
contaminants
SO
2
: < 0.5 ppm;
RH < 60 %, no condensation)
H
2
S: < 0.1 ppm;
RH < 60 %, no condensation)
Test:
10 ppm; 4 days
1 ppm; 4 days