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2 Safety requirements and installation instructions
2.3
Installation in zone 2
–
Adhere to the specified conditions for use in potentially explosive areas. Only use a suitable ap-
proved housing of the minimum protection type IP54 that meets the requirements of EN 60079-15
during installation. Also observe the requirements of EN 60079-14.
–
Only devices which are suitable for operation in Ex-Zone 2 and the conditions present at the oper-
ation location can be connected to electrical circuits in Zone 2.
–
Connecting or disconnecting lines and setting the DIP switch is only admissible in a de-energized
state in Zone 2.
–
The device must be taken out of operation and removed from the Ex area immediately if it is dam-
aged, has been improperly stressed or stored, or malfunctions.
–
Temporary malfunctions (transients) must not exceed the value 497 V (355 V x 1.4).
2.4
Areas that are potentially explosive due to dust
–
The device is not designed for installation in Zone 22.
–
If you nevertheless want to use the device in Zone 22, you have to install it in a housing according
to EN 60079-31. In doing so, observe the maximum surface temperatures. Adhere to the require-
ments of EN 60079-14.
–
Only carry out interconnection with the intrinsically safe electrical circuit in areas that are potentially
explosive due to dust (Zones 20, 21, or 22) if the equipment connected to this electrical circuit is
approved for this zone (e.g. category 1D, 2D, or 3D).
2.5
Safety-related applications (SIL)
When using the device in safety-related applications, observe the instructions in the chapter "Safety-re-
lated applications", as the requirements for the safety-related function vary.
chapter 6 "Safety-related applications", Page 21
8
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