2 Mounting and installation
BU 0200 en-US-4920
83
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2.6.2 Operation in potentially explosive environments - EAC Ex
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All of the conditions which must be observed for operation of the device in an explosion hazard
environment according to EAC Ex are summarized below. The conditions according to
Section
2.6.1 "Operation in potentially explosive environments - ATEX zone 22 3D "apply
.Deviations which are
relevant for approval according to EAC Ex are described below and must be complied with .
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2.6.2.1
Modification of the device
Section 2.6.1.1applies.
Labeling of the device according to EAC EX deviates as follows.
The following applies for wall mounted devices:
IP55:
Ex tc IIIB T125 °C Dc X
IP66:
Ex tc IIIC T125 °C Dc X
For motor mounted devices, the following apply:
IP55:
Ex tc IIIB Dc U
IP66:
Ex tc IIIC Dc U
Allocation:
• Protection with "housing"
• Procedure "A" zone "22" category 3D
• IP55/IP66 rating (according to the device)
IP66 is required for conductive dust
• Maximum surface temperature 125°C
• Ambient temperature -20°C to +40°C
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Information
Code "U"
Code "U" applies for devices which are intended for motor mounting. Devices which are so labeled are classed
as incomplete and may only be operated together with a corresponding motor. If a device with code "U" is
mounted on a motor, the codes and restrictions indicated on the motor or geared motor also apply.
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Information
Code "X"
Code "X" indicates that the permissible ambient temperature range is between -20°C and +40°C.
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