3BHARDWARE CONFIGURATION AND INSTALLATION
SIWAREX U can be used in the Ex area Zone 2
(in accordance with IEC/CENELEC, Directive 94/9/EC).
Some details on the certificates ATEX (Europe) and UL (USA, Canada) are
described below.
Certificate: KEMA 08ATEX0002 X
!
Please always observe the relevant safety instructions. These can be
accessed on the Internet at
http://support.automation.siemens.com/WW/view/en/29443327
Certificate: c-UL-us haz. loc.
UL file number USA: NRAG.E239877
UL file number Canada: NRAG7.E239877
Note on c-UL-us haz.loc:
Danger of explosion – The electrical connections must not be undone live where it
is not certain that the area is not explosive.
Danger of explosion – The replacement of modules can impair suitability for use in
Class I, Division 2.
The device can be used in Class I, Division 2, Groups A, B, C, D or non-Ex areas.
Connection of load cells to SIWAREX U:
Load cells located in Zone 1 or Zone 2 can be connected to SIWAREX U.
For a connection of load cells in Zone 2 it is sufficient when the load cells also have
an authorization for Zone 2 and all relevant guidelines and assembly instructions
are observed.
For a connection of load cells in Zone 1 the load cells require the relevant
authorizations and relevant measures pursuant to the guidelines must ensure safe
operation. For example, the connection of SIWAREX R load cells via the Ex
interface SIWAREX IS is intrinsically safe. The instructions for the Ex interface, the
load cells, and from the ATEX and c-UL-CSA guidelines must be observed here.
Installation and maintenance:
The necessary connection and installation work may only be performed by
qualified personnel.
Repairs may only be carried out at the place of manufacture of the module.
SIWAREX U 4-25
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