VEGA KFD0-CS-Ex1.51P User Manual

Composition

071

G.xm

003

-03-

Subject to reasonable modifications due to technical advances.

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

(only in 2 channel version)

Channel II EEx ia IIC

Channel I Channel

Test resistor

12-

11+

10- 9+

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