WAGO-I/O-SYSTEM 750 Use in Hazardous Environments 69750-652 Serial Interface RS-232 / RS-485ManualVersion 1.4.010.2.2 Special Conditions for Safe Use(ATEX Certificate TÜV 12 ATEX 106032 X)1. For use as Gc- or Dc-apparatus (in zone 2 or 22) the Field bus IndependentI/O Modules WAGO-I/O-SYSTEM 750-*** Ex i shall be erected in anenclosure that fulfils the requirements of the applicable standards (see themarking) EN 60079-0, EN 60079-11, EN 60079-15 and EN 60079-31.For use as group I electrical apparatus M2 the apparatus shall be erected inan enclosure that ensures a sufficient protection according to EN 60079-0and EN 60079-1 and the degree of protection IP64.The compliance of these requirements and the correct installation into anenclosure or a control cabinet of the devices shall be certified by an ExNB.2. Measures have to be taken outside of the device that the rating voltage is notbeing exceeded of more than 40 % because of transient disturbances.3. The connecting and disconnecting of the non-intrinsically safe circuits isonly permitted during installation, for maintenance or for repair purposes.The temporal coincidence of explosion hazardous atmosphere andinstallation, maintenance resp. repair purposes shall be excluded.4. For the type the following shall be considered: The Interface circuits shallbe limited to overvoltage category I/II/III (non mains/mains circuits) asdefined in EN 60664-1.