Siemens SIMATIC HMI Unified Comfort MTP700 Operating Instructions Manual page 172

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Markings and symbols
B.1 Safety-relevant symbols
Symbol
Meaning
Only for industrial applications and indoor areas (control cabinet)
Device is to be integrated into a control cabinet
Install devices approved for Ex Zone 2 in a control cabinet with at least
IP54
Install devices approved for Ex Zone 22 in a control cabinet with at least
IP6x
172
Reference
Unified Comfort Panels
Operating Instructions, 03/2020, A5E46641217-AA

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