Siemens SIMATIC IPC427D Operating Instructions Manual page 26

Safety Instructions
2.2 Notes on usage
Note
Use in an industrial environment without additional protective measures
The device has been designed for use in a normal industrial environment in accordance with
IEC 60721-3-3 (pollutant class 3C2 for chemical influences, 3S2 for dust without sand).
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Operating Instructions, 05/2017, A5E31347215-AB
SIMATIC IPC427D