Siemens SCALANCE X-200 Operating Instructions Manual page 45

Devices with approval [op is Gb] for optical ports
Some devices have an additional ATEX approval according to II 3 (2) G Ex nA [op is
Gb] IIC T4 and an additional IECEx approval according to Ex nA [op is Gb] IIC T4 Gc, refer
to the section "Approvals (Page 77)". This is indicated on the type plate. With these devices
the FO bus connections may run through or in a Zone 1 hazardous area.
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.
Safety notices when using according to FM
If you use the device under FM conditions you must also keep to the following safety notices
in addition to the general safety notices for protection against explosion:
EXPLOSION HAZARD
For operation the device is intended to be installed within an enclosure/control cabinet. The
inner temperature of the enclosure/control cabinet corresponds to the ambient temperature
of the device. Use installation wiring connections with admitted maximum operating
temperature of at least 30 °C higher than maximum ambient temperature.
Wall mounting outside of the control cabinet or housing does not fulfill the requirements of
the FM approval.
Wall mounting is only permitted if the requirements for the housing, the installation
regulations, the clearance and separating regulations for the control cabinets or housings
are adhered to. The control cabinet cover or housing must be secured so that it can only be
opened with a tool. An appropriate strain-relief assembly for the cable must be used.
Note
You must not install the device on a wall in hazardous areas.
SCALANCE X-200
Operating Instructions, 02/2018, C79000-G8976-C284-12
WARNING
WARNING
WARNING
WARNING
Installation
4.1 Safety notices for installation
45