Siemens SIMATIC NET S7-400 - Installation, Wiring, Commissioning, Removal; Important Notes on Using the Device; Notes on Use in Hazardous Areas; Notes on Use in Hazardous Areas According to ATEX UKEX Iecex CCC-Ex

CP 443-5 Extended
Equipment Manual, 01/2023, C79000-G8976-C162-10
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Installation, wiring, commissioning, removal
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3.1 Important notes on using the device
The following safety notices must be adhered to when setting up and operating the device
and during all associated work such as installing, connecting, replacing or removing devices.
3.1.1 Notes on use in hazardous areas
WARNING
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.
WARNING
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.
WARNING
EXPLOSION HAZARD
Do not operate the mode switch if there is a potentially explosive atmosphere.
3.1.2 Notes on use in hazardous areas according to ATEX / UKEX / IECEx / CCC-Ex
WARNING
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,
GB 3836.8.