VEGA KFD2-SR2-Ex1.W - Manual

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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
KFD2-SR2-Ex1.W Isolated switch amplifiers
yellow
green
Output Power
supply
Saf
e area
Input I EEx ia IIC
Switch S3 in position I
Switch S3 in position I
Switch S3 in position I
Switch S3 in position II
Hazar
dous area
LB
SC
red
Power
Rail
LB/SC
collective
error message
only
KFD2-SR2-Ex1.W
without LB, SC
without SC
&
3- 1+
7 8 9
S1
14 15
+
+ -
2+
II I
1+ 3-
1+ 3-
3- 2+
3- 1+
10 k Ω
10 k Ω
400 Ω ≤ R ≤ 2 kΩ
S3
-
Composition
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
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-SR2-
Ex1.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.
Function
Output: relay