VEGA KFD0-CS-Ex1.51P User Manual
Composition
1
071
98
4_
EN
G.xm
l
2
003
-03-
2
4
Subject to reasonable modifications due to technical advances.
Copyright Pepperl+Fuchs, Printed in Germany
Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
KFD0-CS-Ex1.51P
DC repeater without auxiliary power
Saf
e area or hazar
dous area,
zone 2
Hazar
dous
area
Channel I EEx ia IIC
Positioner
I/P converter
Fire detector
Voltage supply
current source
or
(only in 2 channel version)
Channel II EEx ia IIC
Channel I Channel
II
Test resistor
12-
11+
2-
1+
2-
1+
8-
10- 9+
5-
4+
5-
4+
J
J
Composition
1-channel
• Output EEx ia IIC
• Device installation permissible in
zone 2
• Polarity reversal protected
• Accuracy 1 %
• EMC acc. to NAMUR NE 21
Each channel (4 terminals per channel)
functions like a "DC current isolator".
Both channels have separate reverse
polarity protection. The input and output
are galvanically isolated from each
other.
These units are designed for the
connection of fire detectors, smoke
detectors, temperature sensors, etc.
Their increased current range and the
higher accuracy allow for differentiation
between normal operation, fire alarm,
lead breakage and short circuit currents
in the safe area. In many cases they
may also be used for controlling I/P
converters. A separate power supply
with auxiliary power is not required. The
2 channel version allows for the
connection of 2 independent circuits in
a single housing. Due to the input
voltage limiting of 24 V, the maximum
voltage output is 21 V.
• The isolation of power loops for the
control of positioner, I/P converters
etc. A current source is connected to
the safe area terminals.
• The isolation of a current signal from
fire detectors or similar sensors. In
this case, a voltage source can be
connected to the safe area terminals.
A specific measurement current
across a passive sensor can be
measured in the safe area with a
series resistor.
Function
Application