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FAFNIR GmbH
⚫
Schnackenburgallee 149 c
⚫
22525 Hamburg
⚫
Tel.: +49 / (0)40 / 39 82 07-0
⚫
www.fafnir.de
⚫
V
Technical data
The following electrical input values apply to the sensors:
U
i
≤
30 V
I
i
≤
200 mA
P
i
≤
1 W
The effective internal capacitance and inductance that are externally effective, are negligibly small. If the
sensors are supplied with integrated cable, then the electrical characteristics are:
C
c
= 200
pF
/
m
L
c
=
1
µH
/
m
L
c
/R
c
=
30
µH
/
Ω
The sensors may be used in the following ambient temperature range:
T
a
= -40 °C
… +110
°C
When using a sensor with overvoltage protection, the maximum temperature is +90 °C for the sensor
head.
General remark (see also EN 60079-0, Clause 1):
Zone 0 is given only under atmospheric conditions:
Temperature range:
-20 °C
…
+60 °C
Pressure range:
0,8 bar
…
1,1 bar
Oxidant:
Air (oxygen content approx. 21 %)
The sensors achieves a degree of protection of:
degree of protection:
IP68
The following technical data apply to sensors with overvoltage protection:
The nominal DC spark-over voltage amounts to:
U = 350 V ± 20 %
The nominal impulse discharge current amounts to:
I
= 20 kA (10 × Wave 8/20
μs)
The nominal alternating discharge current amounts to:
I
= 20 A (10 × @ 50 Hz, 1 s)
The insulation resistance of an overvoltage arrester amounts to:
R > 10
GΩ
VI
Special conditions of use
1.
Overfill Prevention Sensor and Level detectors with overvoltage protection do not comply with the
dielectric strength requirements according to EN 60079-11, Clause 6.3.13. When performing an in-
sulation test of the intrinsically safe circuit it is therefore necessary to disconnect the device.
2.
When using the integrated overvoltage protection, integration into the equipotential bonding is re-
quired.