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Siemens SIWAREX R Manual de Instruções
Edition 06/2009
5.2

Unit Version

SIWAREX R load cells are made of high-grade steel as a standard. They are
hermetically sealed which allows them to be used in a rugged or aggressive
environment. Their compact structure makes them mostly easy to install.
SIWAREX R load cells are licensed for use in scales with mandatory calibration of
class III DIN EN 45501 and comply with OIML R60 3000d.
SIWAREX R load cells are available alternatively with EEx (i) approval for
applications in hazardous areas.
The connecting cables are generally 4-wire cables.
The above specifications do not apply for the K series and load cells outside the
standard scope of delivery.
The housing of the SIWAREX R high-load cells of the K series are made of
varnished steel.
Descriptions of load cell models not belonging to the standard delivery program
can be found in the respective data sheet.
5.3

Explosion Protection

Only load cells and components with the appropriate Ex approval may be used in
hazardous areas. SIWAREX R load cells are approved according to
II 2 G EEx ib II C T6 or T4
II 3 G EEx nA II T6 or T4
II 3 G EEx nL IIC T6 or T4
II 1 D T 70 °C
II 2 D T 70 °C
II 3 D T 70 °C
. The K series and load cell types outside the standard scope of delivery are
exceptions.
The circuits of the load cells of series CC must be considered grounded. They are
equipped with an integrated overload protection as standard. For this reason, they
cannot be tested for dielectric breakdown with 500 VAC.
To connect the load cells in the hazardous area, the EC type examination
certificates KEMA 00ATEX1133X and KEMA 00ATEX1134X, and their
supplements, must be observed.
NOTE
If an Ex-approved load cell i used in a non-hazardous area, the license is
annulled. The Ex label must be endorsed. The load cell may no longer be used in
a hazardous area.
SIWAREX R Load Cells Operating Manual
A5E00159640
Technical Data
25