Specifications
Publication 1794-SG002D-EN-P - May 2012
76 About the FLEX Ex I/O Systems
Use in North American Hazardous Locations
FLEX Ex modules are rated for installation in Class I Division 1 & 2, Groups
A-D hazardous areas. They are also rated to connect to field devices that are
located in Class I, II, or III, Groups A-G hazardous areas.
If FLEX Ex components are to be installed in a Class II or III location in your
application, you must mount them in a suitable, dust-proof enclosure with the
appropriate connectors, glans, and seals. For example, a NEMA 9 enclosure may
be appropriate. The FLEX Ex modules are rated to connect to devices located in
Class II or III locations.
FLEX Ex modules are rated for installation in North American Class I Zone 1 &
2, Groups IIC, IIB, & IIA hazardous areas. They are also rated to connect to field
devices that are located in North American Class I Zone 0, 1, & 2, Groups IIC,
IIB, & IIA hazardous areas.
As always, observe local code requirements when applying your FLEX Ex
application. For more information, refer to the FLEX Ex System Certification
Reference Manual, publication 1797-RM001
.
Use in ATEX Hazardous Locations
FLEX Ex modules are rated for installation in European Zones 1, 2 and 22. They
are also rated to connect to field devices that are located in European Zones 0, 1,
2, 21 and 22 hazardous areas. The FLEX Ex power supplies (1797-PS1E and
-PS2E2) are rated for use in Zone 1 and 22.
If FLEX Ex components are to be installed in a European Zone method dust or
fiber location in your application, you must mount them in an approved,
dust-proof enclosure with the appropriate connectors, glans, and seals.
Pepperl+Fuchs have three cabinets that are approved for use with FLEX Ex
components in Zone 22 applications: IVK2-ISRPI-V8LC;
IVK2-ISRPI-V8HYW; and IVK2-ISRPI-V16LC. P+F has offices in Twinsburg,
Ohio, USA, and Mannheim, Germany. See their website at
www.pepperl-fuchs.com
.
Typical Gas North American Gas Group IEC Gas Group
Acetylene A IIC
Hydrogen B
Ethylene C IIB
Propane D IIA
Methane
(1)
(1) Mining applications under jurisdiction of MSHA.
DI
Metal dust E —
Coal dust F
Grain dust G