![Siemens SIMATIC PRO Extension Unit 12](http://html.mh-extra.com/html/siemens/simatic-pro-extension-unit-12-f-pn-advanced/simatic-pro-extension-unit-12-f-pn-advanced_operating-instructions-manual_1265372098.webp)
Markings and symbols
B.1 Safety-relevant symbols
Extension Units KPxx
98
Operating Instructions, 05/2019, A5E43600360-AC
Symbol
Meaning
Reference
Only for industrial applications and indoor areas (control cabinet)
Install in control cabinet only
Devices approved for Ex Zone 2 in a control cabinet with min. IP54
Devices approved for Ex Zone 22 in a control cabinet with min.
IP6x