24 •
Use in Hazardous Environments
Installation Regulations
WAGO-I/O-SYSTEM
750
I/O
Modules
3.2.1 Special Conditions for Safe Operation of the ATEX and IEC Ex
(acc. DEMKO 08 ATEX 142851X and IECEx PTB 07.0064)
The fieldbus-independent I/O modules of the WAGO-I/O-SYSTEM 750-.../...-...
must be installed in an environment with degree of pollution 2 or better. In the final
application, the I/O modules must be mounted in an enclosure with IP 54 degree of
protection at a minimum with the following exceptions:
-
I/O modules 750-440, 750-609 and 750-611 must be installed in an IP 64
minimum enclosure.
-
I/O module 750-540 must be installed in an IP 64 minimum enclosure for 230
V AC applications.
-
I/O module 750-440 may be used up to max. 120 V AC.
When used in the presence of combustible dust, all devices and the enclosure shall be
fully tested and assessed in compliance with the requirements of IEC 61241-0:2004
and IEC 61241-1:2004.
When used in mining applications the equipment shall be installed in a suitable en-
closure according to EN 60079-0:2006 and EN 60079-1:2007.
I/O modules fieldbus plugs or fuses may only be installed, added, removed or re-
placed when the system and field supply is switched off or the area exhibits no explo-
sive atmosphere.
DIP switches, coding switches and potentiometers that are connected to the I/O mod-
ule may only be operated if an explosive atmosphere can be ruled out.
I/O module 750-642 may only be used in conjunction with antenna 758-910 with a
max. cable length of 2.5 m.
To exceed the rated voltage no more than 40%, the supply connections must have
transient protection.
The permissible ambient temperature range is 0 °C to +55 °C.
