INM 5500 Rev 11
67
9
APPLICATIONS INVOLVING ZONE 2 AND/OR ZONE 22
HAZARDOUS AREAS
IMPORTANT:
See page iv at the front of this manual for important additional information regarding
the use of these products in countries governed by the ATEX Directive.
The European Community permits Category 3G equipment, such as the MTL5500 , to be installed
in, or connected to, Zone 2 flammable atmospheres provided it meets the requirements of the
ATEX Directive.
MTL5500 Category 3 products have been designed to meet, and carry approval markings for,
Ex nC and/or Ex nA.
In general, meeting the relevant requirements of the appropriate European (CENELEC)
standards is considered the most appropriate method of demonstrating compliance with the
ATEX directive. However, Eaton often has its products approved by other national bodies, such
as FM and CSA and, because national, European, and international standards are converging, it is
generally possible to use other national approvals as supporting evidence for the ATEX Technical
File.
In the context of this document, Zone 2 (Division 2) and Zone 22 hazardous areas are those
that may become potentially explosive through the presence of flammable gases, vapours and
dusts for periods of up to 10 hours per year. It is recommended that the current version of the
standards is consulted for detailed information on the requirements applicable to the particular
installation.
As a consequence of their IS approvals, MTL5500 products
may also be connected into
Zone 22
hazardous areas. Consult individual module approvals for further details.
Unless otherwise specified, the following ambient conditions apply:
Ambient Temperature range –20°C to +60°C
Pollution Degree 2
(See EN 61010-1)
Measurement Category II
(See EN 61010-1)
9 .1 Enclosure
EN 60079-15 specifies the minimum required degree of protection to be IP54, but generally this
is provided by the external enclosure in which the product is mounted.
The user must refer to the specific certificates relating to the products being installed within the
hazardous area to check that all special conditions of safe use have been complied with.
