Vega KFD0-CS-Ex1.51P Manuale Utente Scaricare il pdf

071984_ENG.xml 2003-03-24

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

Safe area or hazardous area, zone 2

Hazardous

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 II

Test resistor

12- 11+

2- 1+

8- 10- 9+

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

1 2 3

Sommario

Pagina 1 - Composition

1071984_ENG.xml 2003-03-24Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in GermanyPepperl+Fuchs Grou

Pagina 2 - Technical Data

2Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in GermanyPepperl+Fuchs Group • Tel.: Germany +49 621

Pagina 3

3071984_ENG.xml 2003-03-24Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in GermanyPepperl+Fuchs Grou