Pepperl Fuchs KFD2-ST2-Ex1.LB Technical Data

Switch Amplifier

2

KFD2-ST2-Ex1-LB

Zone 2

Div. 2

Zone 0, 1, 2
Div. 1, 2

24 V DC

14+
15-

Power Rail

24 V DCERR

2+

3-

1+

7+

9+

I

II

10 kΩ

400 Ω ≤ R ≤ 2 kΩ

10 kΩ

Germany: [phone]Pepperl+Fuchs Group

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

USA: [phone] Singapore: [phone]

www.pepperl-fuchs.com [e-mail] [e-mail]

[e-mail]

KFD2-ST2-Ex1.LB

1-channel isolated barrier

<

24 V DC supply (Power Rail)

<

Dry contact or NAMUR inputs

<

Active transistor output

<

Active fault output

<

Line fault detection (LFD)

<

Reversible mode of operation

<

Up to SIL 2 acc. to IEC 61508

<

24 V DC

Function

This isolated barrier is used for intrinsic safety applications. It transfers digital signals (NAMUR sensors/mechanical contacts) from a hazardous
area to a safe area.
The proximity sensor or switch controls an active transistor output per channel for the safe area load. The normal output state is reversed using
switch S1. Switch S2 allows output II to be switched between a signal output and an error message output. Switch S3 enables or disables line fault
detection of the field circuit.
During an error condition, the transistors revert to their de-energized state and LEDs indicate the fault according to NAMUR NE44.
A unique collective error messaging feature is available when used with the Power Rail system.

Connection

Technical Data

General specifications

Signal type Digital Input

Functional safety related parameters

Safety Integrity Level (SIL) SIL 2

Supply

Connection Power Rail or terminals 14+, 15­Rated voltage U
Ripple ≤ 10 %
Rated current I

Input

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 180997_eng.pdf

r

r

20 ... 30 V DC

≤ 50 mA

1

Switch Amplifier KFD2-ST2-Ex1.LB

Germany: [phone]Pepperl+Fuchs Group

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

USA: [phone] Singapore: [phone]

www.pepperl-fuchs.com [e-mail] [e-mail]

[e-mail]

Technical Data

Connection side field side
Connection terminals 1+, 2+, 3­Rated values acc. to EN 60947-5-6 (NAMUR), see system description for electrical data
Open circuit voltage/short-circuit current approx. 8 V DC / approx. 8 mA
Switching point/switching hysteresis 1.2 ... 2.1 mA / approx. 0.2 mA
Line fault detection breakage I ≤ 0.1 mA , short-circuit I > 6 mA

Output

Connection side control side
Connection output I: terminals 7+ ; output II: terminals 9+
Signal level 1-signal: (L+) - 3.5 V (100 mA, short-circuit protected)

Output I signal , electronic output, active
Output II signal or error message , electronic output, active
Collective error message Power Rail

Transfer characteristics

Switching frequency ≤ 5 kHz

Galvanic isolation

Input/Output reinforced insulation acc. to IEC 62103, rated insulation voltage 300 V
Input/power supply reinforced insulation acc. to IEC 62103, rated insulation voltage 300 V
Output/power supply not available , common pole terminal 14+
Output/Output not available , common pole terminal 14+

Indicators/settings

Display elements LEDs
Control elements DIP-switch
Configuration via DIP switches
Labeling space for labeling at the front

Directive conformity

Electromagnetic compatibility

Directive 2014/30/EU EN 61326-1:2013 (industrial locations)

Conformity

Galvanic isolation IEC 62103:2003
Electromagnetic compatibility NE 21:2004
Degree of protection IEC 60529:2001
Input EN 60947-5-6:2000

Ambient conditions

Ambient temperature -20 ... 60 °C (-4 ... 140 °F)

Mechanical specifications

Degree of protection IP20
Connection screw terminals
Mass approx. 150 g
Dimensions 20 x 119 x 115 mm (0.8 x 4.7 x 4.5 inch) , housing type B2
Mounting on 35 mm DIN mounting rail acc. to EN 60715:2001

Data for application in connection with hazardous areas

EU-Type Examination Certificate PTB 00 ATEX 2035

Marking 1 II (1) G [Ex ia] IIC

Input Ex ia IIC, Ex ia IIIC
Voltage U
Current I
Power P

Supply

Maximum safe voltage U

Output

Maximum safe voltage U

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 180997_eng.pdf

0-signal: switched off (off-state current ≤ 10 µA)

1 II (1) D [Ex ia] IIIC

10.5 V

o

13 mA

o

34 mW (linear characteristic)

o

40 V DC (Attention! The rated voltage can be lower.)

m

40 V DC (Attention! The rated voltage can be lower.)

m

rms

rms

2