Product Description - Vega KFD0 Series Product Information

Product description

1
Functional principle
Separators separate intrinsically safe circuits from non-intrinsi-
cally safe circuits. In general, a difference is made between gal-
vanic separation by:
Ex separators (with external energy)
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Separators (without external energy)
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Limitation of the electrical variables by:
Safety barriers
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Ex separator VEGATRENN 149AEx
The Ex separator VEGATRENN 149AEx is used as intrinsically
safe power supply for Ex approved 4 ... 20 mA/HART sensors.
Through the auxiliary energy the sensor can be provided with
more power. The instrument ensures a galvanic separation be-
tween sensor circuit and processing circuit and hence between
Ex and non-Ex areas. The load-independent 4 ... 20 mA current
is transmitted linearly to the output. The sockets in the front en-
able HART communication with the sensor via VEGACONNECT
3. The necessary communication resistance (R = 250 Ω) is al-
ready integrated in VEGATRENN 149AEx.
Product properties:
Universal for all passive 4 ... 20 mA/HART sensors
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HART transmission to the output side
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Sockets in the front for connection of VEGACONNECT
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SIL 2 qualified
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Fig. 1: Ex separator VEGATRENN 149AEx
Separator type KFD0
The separator KFD0-CS-Ex1.51P is used for intrinsically safe
power supply and signal transmission of Ex approved 4 ... 20 mA
sensors. It is loop-powered without external energy. The instru-
ment ensures a galvanic separation between sensor circuit and
processing circuit and hence between Ex and non-Ex areas. The
load-independent 4 ... 20 mA current is transmitted linearly to the
output. However, a HART signal is not transmitted.
Product properties:
Universal for all passive 4 ... 20 mA sensors
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Also in conjunction with signal conditioning instruments with-
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out own Ex approval
Loop-powered, i.e. no additional power supply required
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Mounting of the separator in Ex zone 2 permitted
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Separating and protective instruments – Separating and protective instruments
Product description
Fig. 2: Separator type KFD0-CS-Ex1.51P
Safety barrier type 9001
The safety barrier type 9001 is used for intrinsically safe measur-
ing current transmission in Ex Zone 1 without galvanic separation.
It is hence suitable for connection of an indicating instrument to
the non-intrinsically safe 4 ... 20 mA output of a signal condition-
ing instrument. Safety barriers are also called zener barriers.
Product properties:
Universal use for all 4 ... 20 mA indicating instruments
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Loop-powered, i.e. no additional power supply required
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Fig. 3: Safety barrier type 9001
1.1 Application examples
Ex separator VEGATRENN 149AEx
Fig. 4: Intrinsically safe supply of an ultrasonic sensor via VEGATRENN 149AEx,
indication of the measured value or transmission to a PLC/ control system input card
(4 ... 20 mA)
1 Sensor
VEGATRENN 149AEx
2
3 Indication
PLC/Control system/Processing system
4
2 3 4
1
4 ... 20 mA SPS
20 ... 253 V
AC/DC
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