PR electronics 7501 Manual Del Producto página 46

7501QI01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Ex ia installation
General installation instructions
The sensor circuit is not infallibly galvanic isolated from the supply output circuit. However, the
galvanic isolation between the circuits is capable of withstanding a test voltage of 500Vac during 1
minute.
The enclosure must be connected to the potential matching line.
If the transmitter is physically connected to a possible source of heating or cooling, e.g. by
mounting to a process pipe or a temperature sensor, the temperature at the point of connection
shall be within the ambient temperature range as given in the certificate or in this manual.
Cable entries and blanking elements shall be used that are suitable for the application and correctly
installed.
For installalation of 7501A in zone 0 / EPL Ga, the transmitter must be installed such, that even in
the event of rare incidents, ignition sources due to impact and friction, sparks are excluded.
Protection degree of IP 54 according to IEC 60529 is achieved if certified cable glands or conduit
entry devices are used that are suitable for the application and correctly installed.
Protection degree of IP 68 according to IEC 60529 is only achieved if certified cable glands or
conduit entry devices are used that are suitable for the application and correctly installed with
sealing washers or Loctite sealant added to the threads of the sensor, blanking elements and cable
glands.
For group III (dust), electrostatic charging of the paint layer shall be avoided.
Revision date: Version Revision Page:
2015-09-16 V2R0 2/6
46 7501V104-ES