VEGA KFA6-SR2-Ex2.W User Manual
Isolated switch amplifiers
KFA6-SR2-Ex2.W
Output: relay
Input I EEx ia IIC Input II EEx ia IIC
230 V AC
• 2-channel
• Control circuit EEx ia IIC
• Reversible mode of operation
• 1 relay output with 1 changeover
contact per channel
• EMC acc. to NAMUR NE 21
• LB/SC monitoring
• 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-SR2Ex2.W, an LB/SC collective error
message is in addition transferred
through the Power Rail to the power
feed module. The intrinsically safe
inputs per DIN EN 50020 are safely
isolated from the output and the power
supply. Relay outputs are galvanically
separated from the mains power in
accordance with IEC 61140. Relay
outputs are galvanically separated from
each other in accordance with
IEC 61140.
1+ 3-
400 Ω ≤ R ≤ 2 kΩ
10 kΩ
1+ 3-
without SC
without
LB, SC
1+ 3-
10 kΩ
2+
II
I
S1 S2
yellow yellow
Composition
4+ 6-
400 Ω ≤ R ≤ 2 kΩ
10 kΩ
4+ 6-
3-2+
3-1+
4+ 6-
LB
SC
S3 S3
red red
789 101112
Output I
10 kΩ
6-5+
6-4+
5+
LB
SC
II
I
&&
Output II
green
Switch S3 in position I
Switch S3 in position I
Switch S3 in position I
Switch S3 in position II
+-
+-
14 15
Power
supply
LB/SC
Power
collective
Rail
error message
only
KFD2-SR2-Ex2.W
zone 0, zone 1
Hazardous area,
1
Safe area
103373_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 +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
Technical Data
Supply
Connection terminals 14, 15
Rated voltage 207 ... 253 V AC, 45 ... 65 Hz
Ripple Rated current Power loss 1,2 W
Power consumption ≤ 1,3 W
Input
Connection terminals 1+, 2+, 3-; 4+, 5+, 6-
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 output I: terminals 7, 8, 9 ; output II: terminals 10, 11, 12
Output I and II 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
Output/Output basic 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 2081 , 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 10,6 V
Current I0 19,1 mA
Power P0 51 mW (linear characteristic)
Type of protection [EEx ia and EEx ib]
Explosion group IIA IIB IIC
External capacitance 72 µF 16,2 µF 2,32 µF
External inductance 780 mH 390 mH 97 mH
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
Safety maximum voltage U
Electrical isolation
Input/Input not available
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
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
103373_ENG.xml 2003-03-25
Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany
m
m
107 switching cycles
253 V AC / 126,5 V AC (Attention! Um is no rated voltage.)
253 V AC (Attention! The rated voltage can be lower)
KFA6-SR2-Ex2.W
eff
eff
Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
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