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Electrical connection
Disconnect the system from power. Then connect the device according to the connection diagram.
BE-Connection:
When mounting the sensor, a galvanic connection has to be made from the electronics to the potential
of the protective wire. This is made by means of the red BE-cable.
The potential BE must be connected to the container potential! This connection should be
made over the shortest distance and routed with straight wire. (Shortening or lengthening
of the cable is possible, using a single-lead cable 0,25...1,5 mm
Please take note that the use of a DC / DC-transducer calls briefly for a higher current
than the operating current when initially switching on the equipment. Therefore the power
supply must have enough low-impedance!
Installation of cables
Wiring of the sensor should be routed separately or screened from heavy conductor
lines, as in extreme cases inductive peak voltages can destroy the sensors despite the
integrated protective circuit. Screened cable or twisted lines are recommended, espe-
cially for longer cable runs > 5 m. Direct control of electric light bulbs is to be avoided,
because during the switch-on moment cold current is many times the rated current and
can destroy the output stage of the sensor.
Units with strong fields nearby, e. g. high power walkie-talkies, or noise sources in the
lower frequency range, e. g. long, middle or short wave transmitters should not be oper-
ated close to the sensors or additional measures have to be taken in order to eliminate
incorrect operation.
10
(BE)
RD
BN/1
C
BK/4
WH/2
BU/3
PNP
+
-
2
)
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