Notes On Use In Hazardous Areas According To Atex / Iecex - Siemens SIMATIC CC712 Operating Instructions Manual

Installation, wiring, commissioning
3.1 Important notes on using the device
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.
If a device is operated in an ambient temperature of more than 60 to 70 °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.
3.1.2

Notes on use in hazardous areas according to ATEX / IECEx

DIN rail
In the ATEX and IECEx area of application only the Siemens DIN rail 6ES5 710-8MA11
may be used to mount the modules.
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.
Cable
If the cable or conduit entry point exceeds 70 °C or the branching point of conductors
exceeds 80 °C, special precautions must be taken. If the equipment is operated in an air
ambient in excess of 50 °C, only use cables with admitted maximum operating temperature
of at least 80 °C.
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).
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WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
Operating Instructions, 05/2019, C79000-G8976-C503-01
SIMATIC CC712