Special Requirements; Enclosure; Areas With Different Classifications - Mettler Toledo IND780 Guia De Instalacion

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Special Requirements

When an IND780 terminal is installed inside an area classified as Division 2 or Zone 2/22, some
special requirements must be considered. This chapter discusses these items. The METTLER
TOLEDO control drawing 64069877 and the ATEX approval certificate must also be reviewed for
any special requirements.
3.1.

Enclosure

Only IND780 terminals that are factory-labeled as Category 3 or approved for Division 2 may be
installed into a Division 2 or Zone 2/22 hazardous area. Also note that a Nationally Recognized
Test Laboratory approved dust tight enclosure is also required for proper installation of the panel-
mount terminal in the U.S. and Canada. This note is on the METTLER TOLEDO control drawing
64069877.
3.2.

Areas with Different Classifications

Only properly marked IND780 terminals are approved for use in an area classified as Division 2 or
as Zone 2 or Zone 22. This approval DOES NOT mean that the IND780 terminal can be used in
Division 1 or Zone 0/1 areas. Different precautions must be taken when installing equipment into
these areas. METTLER TOLEDO offers other terminals for use in Division 1 or Zone 0/1 areas.
If any portion of the installation involves an area classified as Division 1 or Zone 0/1, then the
complete system should be configured to be compatible with a Division 1 or Zone 0/1
classification. For instance, if the IND780 terminal will be installed in a Division 2 area but the load
cells will be located within a Division 1 area, a load cell barrier is required. These barriers are
available through METTLER TOLEDO.
Some IND780 options are not approved for all areas. Please consult the METTLER TOLEDO control
drawing 64069877 for specific details. Applications involving a mixture of Division ratings or a
mixture of Zone ratings should be discussed with METTLER TOLEDO. Please consult your local
METTLER TOLEDO representative regarding these types of applications.
64063214 | 07 | 02/2018
IND780 TERMINALS THAT ARE NOT FACTORY-LABELED AS DIVISION 2 APPROVED OR
MARKED AS EUROPEAN CATEGORY 3 MUST NOT BE INSTALLED INTO A DIVISION 2 OR ZONE
2/22 ENVIRONMENT.
METTLER TOLEDO IND780 Division 2 and Zone 2/22 Installation Guide
WARNING
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