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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.
Wall mounting outside of the control cabinet or housing does not fulfill the requirements of the
FM approval.
Note
You must not install the device on a wall in hazardous areas.
Safety notices when using the device as industrial control equipment according to UL
61010-2-201
If you use the device under UL 61010-2-201 conditions you must also keep to the following
safety notices in addition to the general safety notices for protection against explosion:
Open equipment
The devices are "open equipment" according to the standard IEC 61010-2-201 or UL
61010-2-201 / CSA C22.2 No. 61010-2-201. To fulfill requirements for safe operation with
regard to mechanical stability, flame retardation, stability, and protection against contact, the
following alternative types of installation are specified:
• Installation in a suitable cabinet.
• Installation in a suitable enclosure.
• Installation in a suitably equipped, enclosed control room.
If the temperature at the cable or housing socket or at the branching points of the cables
exceeds 60 °C, special precautions must be taken. If the equipment is operated at ambient
temperatures in excess of 40 °C, only use cables with permitted operating temperature of at
least 80 ℃.
SCALANCE M874, M876
Operating Instructions, 02/2023, C79000-G8976-C331-12
WARNING
WARNING
WARNING
WARNING
Installation and removal
4.1 Safety notices for installation
43
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