Siemens SIMATIC S7-300 Reference Manual page 39

Climatic conditions
You can use S7-300s under the following climatic conditions:
Table 1-7
Climatic Conditions
Temperature:
horizontal installation:
vertical installation:
Relative humidity
Atmospheric pressure
Concentration of contami-
nants
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Climatic Conditions
from 0 to 60_C
from 0 to 40_C
10 to 95 %
1080 to 795 hPa
SO : < 0.5 ppm;
2
RH < 60 %, non-condensing
H S: < 0.1 ppm;
2
RH < 60 %, non-condensing
General Technical Specifications
Permitted range Remarks
–
Non-condensing, corres-
ponds to relative humi-
dity (RH) Class 2 accor-
ding to IEC 61131, Part 2
Corresponding to an alti-
tude of –1000 to 2000 m
Test: 10 ppm; 4 days
Test: 1 ppm; 4 days
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