Comments Ambient conditions Application areas
Storage and transport tempera‐
ture
-40 ... +85 °C
Relative humidity 5 ... 95 % No condensation; corresponds
to relative humidity (RH) stress
level 2 to DIN IEC 61131-2
Air pressure during operation IEC 60068-2-13 1 080 ... 795 hPa (operation)
(‑1 000 ... +2 000 m above sea
level)
Air pressure during transport and
storage
IEC 60068-2-13 1 080 to 660 hPa (storage)
(‑1 000 to +3 500 m above sea
level)
12.3 Reliability
Mean Time Between Failure (MTBF)
The MTBF calculation results in the following value:
Table 12-5 MTBF
Electronic Weighing System MTBF in years
SIWAREX WP321 1495 years @TA = 40 °C
12.4 Approvals
NOTICE
Safety guidelines for applications in hazardous areas
For applications in hazardous areas, read the safety instructions in the document "Product
Information - Use of SIWAREX Modules in a Zone 2 Hazardous Area (https://
support.industry.siemens.com/cs/ww/en/)".
Note
The current approvals for your device can be found on the nameplate.
→ CE approval (https://support.industry.siemens.com/cs/ww/de/
view/102423743/en)
→ UL approval USA (https://
support.industry.siemens.com/cs/ww/de/view/19248974/en)
→ UL approval Canada (https://
support.industry.siemens.com/cs/ww/de/view/89339055/en)
Technical data
12.4 Approvals
SIWAREX WP321
120 Operating Instructions, 08/2019, A5E33715669A-AD
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