Notices On Use In Hazardous Areas According To Atex / Iecex - Siemens Simatic RTU303xC Series Operating Instructions Manual

EXPLOSION HAZARD
The equipment is intended to be installed within an enclosure/control cabinet. The inner
service temperature of the enclosure/control cabinet corresponds to the ambient
temperature of the module. Use cables with a maximum permitted operating temperature of
at least 20 °C higher than the maximum ambient temperature.
When used in hazardous environments corresponding to Class I, Division 2 or Class I,
Zone 2, the device must be installed in a cabinet or a suitable enclosure.
3.1.2

Notices on use in hazardous areas according to ATEX / IECEx

Requirements for the cabinet/enclosure
To comply with EC Directive 2014/34 EU (ATEX 114) or the conditions of IECEx, this
enclosure or cabinet must meet the requirements of at least IP54 (in compliance with
EN 60529) according to EN 60079-7.
Take measures to prevent transient voltage surges of more than 40% of the rated voltage.
This is the case if you only operate devices with SELV (safety extra-low voltage).
If a device is operated in an ambient temperature of more than 60 °C, the temperature of
the device housing may be higher than 70 °C. The device must therefore be installed so
that it is only accessible to service personnel or users that are aware of the reason for
restricted access and the required safety measures at an ambient temperature higher than
60 °C.
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
WARNING
WARNING
WARNING
WARNING
WARNING
Connecting up, installation, commissioning
3.1 Important notes on using the device
63