PR 5331A Manual page 20

5331QI01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Installation notes.
The sensor circuit is not infallibly galvanic isolated from the input circuit. However, the galvanic
isolation between the circuits is capable of withstanding a test voltage of 500Vac during 1
minute.
In a potentially explosive gas atmosphere, the transmitter shall be mounted in a metal form B
enclosure in order to provide a degree of protection of at least IP20 according to IEC60529. If
however the environment requires a higher degree of protection, this shall be taken into
account.
If the transmitter is installed in an explosive atmosphere requiring the use of equipment
protection level Ga, Ma and Mb, and if the enclosure is made of aluminum, it must be installed
such, that ignition sources due to impact and friction sparks are excluded.
For installation in a potentially explosive dust atmosphere, the following instructions apply:
For explosive dust atmospheres, the surface temperature of the outer enclosure is 20 K above
the ambient temperature.
The transmitter shall be mounted in a metal enclosure form B according to DIN43729 that is
providing a degree of protection of at least IP6X according to IEC60529, that is suitable for the
application and correctly installed.
Cable entries and blanking elements shall be used that are suitable for the application and
correctly installed.
For an ambient temperature ≥ 60ºC, heat resistant cables shall be used with a rating of at least
20 K above the ambient temperature.
Revision date: Version Revision 0Page:
2013-06-03 V1R0
2/2
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5331V11 4 -UK