VEGA KFD2-SR2-Ex1.W User Manual

Isolated switch amplifiers

KFD2-SR2-Ex1.W

Output: relay

Input I EEx ia IIC

24 V DC

• 1-channel

• Control circuit EEx ia IIC

• Reversible mode of operation

• 1 relay output with 1 changeover
contact

• EMC acc. to NAMUR NE 21

• LB/SC monitoring

• LB/SC collective error message via
Power Rail

• Usable up to SIL 2 acc. to IEC 61508

Function

The transformer isolated barrier
transfers digital signals from the
hazardous area. Sensors per
DIN EN 60947-5-6 (NAMUR) and
mechanical contacts may be used as
alarms. Control circuits are monitored
for lead breakage (LB) and short circuit
(SC). The external faults are indicated
according to NAMUR NE44 by a red
flashing LED. For type KFD2-SR2­Ex1.W, an LB/SC collective error
message is in addition transferred
through the Power Rail to the power
feed module. The intrinsically safe input
is per DIN EN 50020 safely isolated
from the output and the power supply.
The relay output is in accordance with
IEC 61140 safely isolated from the
power supply.

1+ 3-

1+ 3-

without SC

without LB, SC

1+

Composition

10 kΩ

2+

S1

yellow

400 Ω ≤ R ≤ 2 kΩ

10 kΩ

3-2+

3-1+

3-

LB
SC

II

I

&

S3

red

green

789

Output Power

14 15

supply

Switch S3 in position I

Switch S3 in position I

Switch S3 in position I

Switch S3 in position II

+-

+

-

Power

Rail

only
KFD2-SR2-Ex1.W

Hazardous area

Safe area

LB/SC
collective
error message

103367_ENG.xml 2003-03-25

Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany

1

Pepperl+Fuchs Group • Tel.: Germany [phone] • USA [phone] • Singapore [phone] • Internet http://www.pepperl-fuchs.com

Technical Data

Supply

Connection Power Rail or terminals 14+, 15-
Rated voltage 20 ... 30 V DC
Ripple ≤ 10 %
Rated current 20 ... 23 mA

Input

Connection terminals 1+, 2+, 3-
Rated values acc. to IEC 60947-5-6 (NAMUR, DIN 19234), 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
Pulse / Pause ratio ≥ 20 ms / ≥ 20 ms
Lead monitoring breakage I ≤ 0,1 mA , short-circuit I > 6 mA

Output

Connection terminals 7, 8, 9
Output signal ; relay
Contact loading 253 V AC / 2 A / cos ϕ > 0.7; 126.5 V AC / 4 A / cos ϕ > 0.7; 40 V DC / 2 A resistive load
Energised/De-energised delay approx. 20 ms / approx. 20 ms
Mechanical life

Transfer characteristics

Switching frequency < 10 Hz

Electrical isolation

Output/Power supply reinforced insulation according to IEC 61140, rated insulation voltage 300 V

Standard conformity

Climatic conditions acc. to DIN IEC 721

Directive conformity

Electromagnetic compatibility standards

Directive 89/336/EG EN 61326, EN 50081-2, NE 21

Ambient conditions

Ambient temperature -20 ... 60 °C (253 ... 333 K)

Mechanical specifications

Protection degree IP20
Mass approx. 150 g

Data for application in conjunction
with hazardous areas

EC-Type Examination Certificate PTB 00 ATEX 2080 , for additional certificates see www.pepperl-fuchs.com

Group, category, type of protection ¬ II (1) G D [EEx ia] IIC [circuit(s) in zone 0/1/2]
Input EEx ia IIC
Voltage U0 10,5 V

Current I0 13 mA

Power P0 34 mW (linear characteristic)

Type of protection [EEx ia and EEx ib]

Explosion group IIA IIB IIC
External capacitance 75 µF 16,8 µF 2,41 µF
External inductance 1 H 840 mH 210 mH

Statement of conformity TÜV 99 ATEX 1493 X , observe statement of conformity

Group, category, type of protection,
Temperature classification

Supply

Safety maximum voltage U

Output

Contact loading 253 V AC / 2 A / cos ϕ > 0.7; 126.5 V AC / 4 A / cos ϕ > 0.7; 40 V DC / 2 A resistive load (PTB 00 ATEX 2080)

Safety maximum voltage U

Electrical isolation

Input/Output safe electrical isolation acc. to EN 50020, voltage peak value 375 V
Input/Power supply safe electrical isolation acc. to EN 50020, voltage peak value 375 V

Directive conformity standards

Directive 94/9 EU EN 50014, EN 50020, EN 50021

Entity parameter

Certification number J.I.3002773
FM control drawing No. 116-0035
Suitable for installation in division 2 yes
Connection terminals 1, 3; 2, 3; 4, 6; 5, 6
Input I

Voltage VOC 12,9 V

Current It 19,8 mA

103367_ENG.xml 2003-03-25

Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany

m

m

107 switching cycles

¬ II 3 G EEx nAC IIC T4 [device in zone 2]

253 V AC / 125 V DC (Attention! Um is no rated voltage.)

50 V AC / 4 A / cos ϕ > 0.7; 40 V DC / 2 A resistive load (TÜV 99 ATEX 1493 X)
253 V AC (Attention! The rated voltage can be lower)

KFD2-SR2-Ex1.W

eff

Pepperl+Fuchs Group • Tel.: Germany [phone] • USA [phone] • Singapore [phone] • Internet http://www.pepperl-fuchs.com

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