Notes On Use In Hazardous Areas According To Atex / Iecex; Notes On Use In Hazardous Areas According To Ul Hazloc - Siemens SIMATIC S7-400 Operating Instructions Manual

3.1.3

Notes on use in hazardous areas according to ATEX / IECEx

Requirements for the cabinet
To comply with EC Directive 94/9 (ATEX95) or the conditions of IECEx, this enclosure or
cabinet must meet the requirements of at least IP54 in compliance with EN 60529.
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).
3.1.4

Notes on use in hazardous areas according to UL HazLoc

EXPLOSION HAZARD
DO NOT DISCONNECT WHILE CIRCUIT IS LIVE UNLESS AREA IS KNOWN TO BE
NON-HAZARDOUS.
This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D or non-
hazardous locations only.
This equipment is suitable for use in Class I, Zone 2, Group IIC or non-hazardous locations
only.
CP 443-1 OPC UA
Operating Instructions, 01/2017, C79000-G8976-C427-02
WARNING
WARNING
WARNING
WARNING
Installation, connecting up, commissioning
3.1 Important notes on using the device
31