SIMATIC CM 1242-5
Operating Instructions, 01/2023, C79000-G8976-C245-06
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Installation, connecting up, commissioning
Safety notices on the use of the device
Note the following safety notices when setting up and operating the device and during all
associated work such as installation, connecting up or replacing the device.
3.1 Important notes on using the device
3.1.1 Notices on use in hazardous areas
The device may only be operated in an environment with pollution degree 1 or 2 as
described in EN/IEC 60664-1, GB/T 16935.1.
EXPLOSION HAZARD
You may only connect or disconnect cables carrying electricity when the power supply is
switched off or when the device is in an area without inflammable gas concentrations.
3.1.2 Notes on use in hazardous areas according to ATEX / UKEX / IECEx / CCC-Ex
Requirements for the cabinet
To comply with EU Directive 2014/34 EU (ATEX 114), UK Regulation SI 2016/1107 or the
conditions of IECEx or CCC-Ex, the housing or cabinet must meet the requirements of at
least IP54 (according to EN/IEC 60529, GB/T 4208) in compliance with EN IEC/IEC 60079-7,