KROHNE SMARTSENS PH 8xxx Ex EN - Manual (Page 11)

ELECTRICAL CONNECTIONS
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SMARTSENS PH 8XXX
www.krohne.com 07/2014 - 4002951402 - MA SMARTSENS PH 8xxx R02 en
Electrical connections
4.1 General notes
In order to avoid risks, always observe the following points when electrically connecting a
sensor:
• Ensure that all connecting cables conform to the valid installation standards (e.g. IEC 60079-
14) and withstand the maximum operating temperature.
• Securely lay the connecting cables and sufficiently protect them against damage.
• Securely connect all the cores not in use with the ground potential of the explosive area or
carefully insulate them from each other and from ground (test voltage ≥ 500V
eff
).
4.2 Power supply
The sensor does not require a separate power supply. The required supply for the electronics is
provided via the 4...20 mA current output.
4.3 Inputs/outputs
The connector pin assignment of the sensor is described in the standard documentation. The
sensor signal circuits may only be connected to certified intrinsically safe slave units or circuits.
For more information refer to chapter "Electrical data".
INFORMATION!
When connecting the sensor cable, observe the standard documentation for the sensor, the
chapter "Installation" .
When using junction box SJB 200 W-Ex, the corresponding Ex supplementary instructions must
also be observed.
.book Page 11 Monday, July 21, 2014 3:08 PM